CA2220101C

CA2220101C - Advanced automotive automation and security system

Info

Publication number: CA2220101C
Application number: CA002220101A
Authority: CA
Inventors: Jerry W. Birchfield; Glenn R. Busse; Sidney B. Perdue; Kenneth Ward; Darrell Issa
Original assignee: Directed Electronics Inc
Current assignee: Directed Electronics Inc; DEI Headquarters Inc
Priority date: 1992-09-16
Filing date: 1995-05-15
Publication date: 2001-10-16
Anticipated expiration: 2015-05-15
Also published as: WO1996036949A1; CA2220101A1

Abstract

An electrically powered security system for monitoring and controlling access to a protected area and having multiple levels of alert signal commensurate with the level of security threat to the area; a siren (233 and 235) for communicating a variable alert signal, both visual and audible, progressively including: a low level, medium level and full level alert consisting of a voice warnaway (627), a series of audible chirps (633), or blinking lights (763); an electrically erasable and programmable read only memory (37) for permanently storing system operational parameters and a controller (35) for using the operational parameters for controlling the operation of security system, the security system including a emote transmitter (25) to remotely test all input sensors (69, 79, 89, 121, 131, 141, 151, 171, 191, 193, 197, and 203) and remotely disable specific sensors from operation, thus having control of any combination of variable audio and/or audio-visual alarm response.

Description

W096/~6949 PCT~S9SJ06098 ~D~ANCED AUTOMOTIVE AUTOMATION AND 3ECURITY SY~'1'~
TECHNICAL FIELD

This invention relates to the field of security systems for monitoring restricted areas, such as in and around a vehicle More particularly, it relates to a vehicle security system providing more features, greater range of operator-sys~em interface, and more user-friendly operation than those systems in the prior art.
BACKGROUND ART
Electronic security systems have been in use for many years monitoring or controlling access to secured or restricted ar~as.
These sec:urity systems normally use several sensors or trigger devices for monitoring an area of restriction. Normally a cent:ral controller monitors these devices and takes the appropriate action required by upon receipt of an input from one or more sensors.
Examples of such security systems would include vehicle and hame or business security systems. In today's art many o~ these security systems are controlled by a radio frequency pulse-width-modulated remote-control transmitter. The pulse-modulated radio frequency remote-control transmitter signal is digitally encoded to match the coding of the central controller's decoder, thereby restricting access of the security system to the allotted operators.
Security systems are no longer just security systems, but personal convenience systems as well. Vehicle security sy;stems today o~fer the operator many new, advanced features that were not even conQ;~ed a few years ago. Today the radio frequency remote-controllecl vehicle security system provides remote door Lock-ing/unlocking, remote trunk release, remote window roll up/~own, and remote vehicle starting, to mention a few of the newer features.
Most remote-controlled security systems today use both an audible and a visual arm/disarm notification signal to ver.ify arming and ~l;CArming of the security system. On many occasions, this would be con-q;~ed a nll;cAnce because it could disturb peol?le in an aparl:ment comple~, in a parking garage, or any residence wllen someone arrives in late at night. Most vehicle security systems SUBSTITUTE SHEET (RULE 26) W O 96/36949 PCTAUS9~/06098 today have some method of per~nently disabling siren chirps (audible noti~ication signals), but this does not give the user the :ElP~; hil; ty of choosing when to generate audible notiEication signals. A few security systems accomplish this by a radio frequency remote-control transmitter, but those lose something in the process. One such system delays the chirps (remote RF signal conf; rr~tion) until a second input on the control chAnnel is received or not received (the arm/~ rm noti~ication is just delayed). Another uses a second remote channel to disable the chirps, but loses use of that chAnnel for other purposes.
As of today no known security system uses a light sensor to control the vehicle's light systems. There are light sensor products for vehicles on the market, but none are built into a security system. Some use a light sensor to turn on lights, others turn on lights when the wipers are turned on, and some use a light sensor in vehicle convenience systems.
Most security systems with input ~;A~nostic and bypass capabilities allow as many as 10 full alarm trips, triggered by one input, before disabling that input. If an alarm cycle is reset by the security system's remote-control transmitter, the input is re-enabled; and there is no timer to re-enable the input if the input St ~ h;l; 7es or the environment changes. With today's sensors and the high sensitivity to which the user wishes them to operate, it is not uncommon for a sensor to develop some periods of instabil-ity, particularly with changes in the environmental conditions.
Most of today's security systems do not allow a sensor back into the system once it has been disabled until the security system is rmed and rearmed.
In present-day security systems, a "h;~Pn" switch may be manipulated by the owner to turn off the security system and allow the remote-control transmitter to be used only to lock and unlock the doors. This is called the "valet" mode and is used for vehicle servicing, etc. Valet mode is a set condition of the security system in which the operator may have control of convenience ~eatures, but all alarm functions and outputs are disabled.

SUBSTITUTE SHEET (RULE 26) WO 961315949 PCI~/US9S106098 One of the convenience features of today's remote security systems is the capability to add a remote car starter. This aLllows operators in extreme cold climate areas to remote-start their vehicles to prevent engine block freezing, and to start their vehicles in the morning to warm the vehicle. During hot periods, operators may pre-cool their vehicles before they get in to drive.
Usually when a vehicle is started by remote control, the security system must be disabled in some ~Anne~,otherwise the vibrations, voltage surges, and movement of the vehicle, would activate the A 1 A~ .
The progrA~; ng o~ operational ~unctions on most of tadayls security systems is accompl;~he~ through switches, jumpers, and input/output selection. This means the user or installe;r, if required, must access the control module to change any o~ the operational functions of the security system. This is a nll;c~nce in that most times the control module is buried under the dash, under a seat, or behind a kick panel. This limitation of the user interface with the system is a major problem with today's security systems.
The testing of one of today's comple~ security system~s installation can be a long and tedious task. The installer must check all the inputs to make sure that they are properly connected.
He or she must also check all of the outputs to verify that they operate properly. They also must check that the security system has prope!r range for the RF remote-control transmitter. One existing system has a built-in test mode which is referred ta as a "real time zone monitoring ~;Agnostic mode" and a "RF performance mode". Ha~wever, in these cases the installer requires assistance on the inside of the vehicle to monitor the LED or speaker. Other security systems have to be cont;n~lAlly armed and disarmed while these tests are co~llrted. This is a tedious task, but it also could be ~Am-g;n~ to the security system or vehicle since each time a security system is armed or disarmed the doors are locked or unlocked, the lights flash, and the siren chirps.
As stated in previous patents, one way an intruder gains SUBSTITUTE SHEET (RULE 26) access to a secured area is to remove and restore power to the security system, which on many older security systems will leave the security system inactive. Most of today~s security systems will restore to full alarm mode when power is reapplied, unless a certain condition is preset before power is restored.
The audible chirps or synthesized voice signals of today~s security system are quite loud in a low-noise environment, which can be a n~ nce under many situations. These audible signals are always of the same intensity day or night, in a busy parking lot, in a hospital zone, etc. Some security systems have the capability to completely silence these audible signals, but none have the c~r~h;l;ty to reduce the volume of these audible signals within the control module.
DISCLOSURE OF THE lNv~;N~l~loN
This invention is a automotive automation/vehicle security system that overcomes all of the problems described above. It provides more features, greater range of operator-system interface and more user-friendly operation than those systems in the prior art.
The problem of the chirps creating a nuisance is overcome in the disclosed security system by a means for silencing the security system arm/disarm notification chirps from the system~s remote-control transmitter. When the programmed ch~nn~l 2 remote-control signal is confirmed, the controller starts a 5-second quiet period, during which, if a security system arm/disarm occurs, no audio notification signal output will be generated. Therefore the security system arm/disarm notification will be indicated entirely by the system's visual devices (r~lnn;ng lights will flash and the status of the LED output will change).
The problem of a full alarm response being a nt~ n~e is over-come by the security system providing multiple levels o~ sensor input, which in turn causes the controller to generate multiple levels of alarm output. With the lowest level of threat, the first level of sensor input will never cause the security system controller to generate a full audio and visual output. The ~;~--~

SUBSTITUTE SHEET (RULE 26) CA 02220l0l lss7-l0-3l wog6/3~ss4s PCT~S9s/l~60s8 response to any activation of this input is several seconds of siren chirps or synth~c;~ed voice m~A~e. The second level of input wil;l always respond to the first activation of the second level inpllt within any short period, such as lO-seconds, with the same output as the lowest level of threat input above, bu1: any subsequent input within the lO-second window initiated by the ~irst (second level) input will cause the controller to generate a ~ull alarm response. This feature of the invention fully utilizes the capability o~ many of today's dual-level sensors. The third level input (the door input) is a two step input in that the first several seconds of alarm are siren chirps or synthec;7ed voice message, after which will always ~ollow the ~ull siren alarm mode, unless the security system is ~; ~Ar~9~ by the user. The fourth level of input is the normal alarm instant input, which initiates a full alarm mode immediately upon being activated.
The security system of the invention introduces a new feature that increases the convenience of automotive automation/security systems. :tt uses a light-sensor input to allow the security system controller to control the vehicle's light systems. The Nite-Lite ~eature uses the light sensor to measure the level of light to control the light systems of the vehicle under various circumstances. The security system also controls the lights under other circ:umstances associated or not associated with light sensor.
In daytime, the only lights that are turned on are the rnnn; ng lights, which are flashed during the full alarm mode and when the security system is armed or disarmed; with the exception that when the w;n~h;eld wipers are turned on, they override the light-sensor control and turn on the h~A~l; ghts and the r~1nn;ng lights for driving during rainy conditions. At night or under low light conditions; the h~A~ 1; ghts, r11nn; ng lights, and dome lights could be turned on; dep~n~;ng on the mode of operation. While driving, the headl:ights and r11nn;ng lights turn on automatically when the light level drops below the light-sensor li~hts-on-threshold, and off when the light level goes above the lights-off-threshold. When the security system is armed, the heA~l; ghts and rl1nn;ng lights SUBSTITUTE SHEET (RULE 26) turn on for 20 seconds. Upon ~;-CAr~ the headlights and rllnn;ng lights turn on for 20 seconds, and the dome lights turn on for 60 seconds or until the ignition is turned on. During a full alarm mode, the headlights turn on and the rllnn;ng and dome lights flash.
When the ignition is turned off, the lights go out for S seconds if on, then the headlights and running lights turn on for 20 seconds. If any lights are on when the ignition is turned on, they will turn off; five seconds later, the heA~l ights and rllnn; n~
lights will turn on for driving.
The problem with temporarily disabled sensors and the prior-art approach to remove them from the security loop is solved in this invention by the addition of circuitry that re- analyzes the unstable sensor at a later time and then, if the sensor is found to be stable, the sensor is returned to the system. If any prolonged sensor instability is detected, that sensor is bypassed for a stable period of one hour. If the sensor input in question activates the full alarm mode three times in one hour, that input is ~ypassed upon the ne~t activation without entry into the full alarm mode. If the input stabilizes for a period of one hour, it is re-enabled. If the bypassed input is activated ;nC;~e that one-hour window, the one-hour timer is reset to one hour and restarted.
The only way the bypass flag can be reset is for the timer to e~pire or for the ignition to be turned on while the security system is disarmed. Even if the security system is reset while in the full alarm mode via the system's remote-control transm~tter, the bypass counter would be incL- -nted and if the count was then four, the bypass flag for this input would be set, bypAs~;ng the input in question.
Another problem solving feature of the invention includes means for placing the security system in "valet" mode or ~ ving it from "valet" mode using the remote-control transmitter and one of the vehicle's doors. This is accompl; ~he~ by opening a door of the secured vehicle and transmitting remote control signals from chAnnel 1, then rhAnn~l 2 within two seconds, and again ch~nn~l 1 within two seconds. This toggles the valet mode; if valet is on, SUBSTITUTE SHEET (RULE 26) wos6l36s4s PCT~S95/06098 it is turned of~, or if valet is off, it is turned on.
The problem o~ losing ~ecurity an~ sa~ety while remote starting a secured vehicle is solved by this invention. This inventio~l allows the user to remote start the vehicle while at the same time cont;nl~es to provide fUll security to the doors, trunk, hood and windows. Thus remote starting may be provided with real security and safety being continued on the vehicle. ~f the security system is armed when the remote-control transmitter car-start signal is initiated, the security system will bypass some of the sensors before issuing the car start output signal. rf the security system is disarmed when the remote-control transmitter car-start signal is initiated, the security system will lock the vehicle'~5 doors before generating the car-start output signal, giving the user more security and safety. This feature requires a remote car-start control module for implementation of the remote car-starting and may be user-programmed to maintain security and safety wihen the car start output is generated.
An additional problem solving feature of the invention is the ~~-n~ for using the remote-control transmitter and valet switch located ~ithin the cabin to program the system. once entered into the function programming mode, the user may depress the valet switch to select the function to be programmed, then toggle that function by using the remote-control transmitter. The security system will generate siren chirps, to indicate the mode of the system operational function: one chirp to signify factory de~ault and two chirps to signify an alternate mode. By depres~;ng the valet s~itch, mounted on the dash, and transmitting wit:h the remote-control transmitter, all system-programmable operational functions may be selected and programmed. This overcomes the need to access the control module to change system operational function programm:ing, which in most cases with today's security systems would re~uire the user return the vehicle to the dealer/installer.
The installer benefits most from the next feature oE this invention because he or she will not require any assistance in testing the installation. The user also benefits in th;~t the SUBSTITUTE SHEET (RULE 26 WO 96/36949 PCT/US9S/06C9E~
installation may be tested quickly and efficiently reducing the cost of the in~tallation. Means are provided for the security system to be tested using a highly advanced installation test mode.
The security system-test mode is entered by generating certain inputs in a predetermined sequence. For instance, the user or installer may undertake a simple program, such as ~ rm the security system, press and hold the dash mounted valet switch, turn on the ignition, turn off the ignition, release the valet switch, then press and release the valet switch once more enter the "test~
mode. The disclosed security system will respond with one long chirp to indicate it has entered the test mode. While in the test mode, the user may test any of the operational inputs. The security system will respond with a siren chirp when the input goes active, and another siren chirp when the input goes inactive. At the same time, the security system's light-emitting-diode will indicate the last two inputs activated. By using the remote-control transmitterls chAnnel 1, the user may select one input to test, which will disable all the other inputs. The user can stçp through all the inputs in this mode by pressing the remote-control transmitter as many times as the zone of the input to be tested.
One of the most important features of the security system test mode is the remote-control transmitter range test.
System radio frequency remote-control transmitter range is a major problem with some installations due to interference from ; n~; ~e the vehicle or the placement of the control module, which contains the RF receiver. The RF range test is accomplished by transmitting a control signal on any remote chAnn~l other than chAnn~l l. As long as one of these All~; l; Ary remote-control transmitter inputs is active, the security system will respond by generating a siren chirp once a second. This allows the user to test the range of the system by WAl k; n~ away from and around the vehicle while pre~; ng one of the remote-control transmitter buttons.
A problem solving feature of this invention is the restoration of the security system's operational mode after a power failure. At SUBSTITUTE SHEET (RULE 26) _ WO 96/31S949 PCT/US9511~6098 power-down, all pertinent data is stored in permanent memor~r. At power-up, this data is restored to the system's random access memory ancl registers before the system's pro~ram is restarted. This feature a]lows the security system to be restored to the e~act same conditions that e~isted at power-down. If the security system was in the armed mode at power-down, it will return to the armed mode when power is restored.
A nuiLsance reducing feature of this invention is to lower the output vo~Lume o~ the siren chirps by varying the duty cycle of the siren power supply during the chirps. This invention also inc;ludes two means, by which the security system can reduce the output volt-age/power at the siren output to generate lo~er volume chirps. The volume of the output chirps may be fi~ed in the security syst~em at a certain power duty cycle, controlled by security system program switches, or remotely controlled/selected with the system remote-control transmitter. In this way, the invention is e~tremely use~ul in and around hospitals and in other areas requirins~ the arm/~i~A~n meCcAges to be issued quietly. The user has the ab:ility to change the decibel level of the audible arm/~;~Arm notific~tion outputs as well as to turn them off, using the hand-held remote-control tr.ansmitter.
Accordingly, the main object of this invention is a vehicle security system that provides the user with a better interface to the system, allowing him or her to select of a wide variet:y of unique features not easily accessible in e~isting security systems.
other objects of the invention include a vehicle security system that allows the user to turn off the audible arm/~i CArr notifications by using the hand-held remote-control transmitt~er; a security system with several levels of sensor inputs that caus,e the controller to generate several levels of alarm output; a security system wit:h a light sensor input and other inputs to control the vehicle light systems; a security system that provides means for re-analyzing an unstable sensor to determine if it's st~h;l;t~y has returned and return it to the security system if it has; a security system where the user may enter and e~it the valet mode usinq the _g_ SUBSTITUTE SHEET (RULE 26) wo96l36s49 PCT~S95/06098 remote-control transmitter and one of the vehicle doors; a security system that provides a remote start output while maint~;n;ng ~-~;mllr security and safety; a security system that allows the user to program system operational functions using the remote-control transmitter and the valet switch; a security system that allows the installer or user to test the system's operational inputs and the system's RF remote-control transmitter range with m;n;~l effort;
a security system that restores security to pre-power fail conditions when power is restored; and a security system that has the means for generating variable volume arm/~ rr notification chirps.
These and other objects of the invention may be found from a close reading of the Description of the Preferred Embodiment taken along with the drawings appended hereto. The scope of protection sought by the inventors may be gleaned from a fair reading of the claims that conclude this Specification.

BRIEF DESCRIPTION OF THE DRAWINGS
FIGURE 1 is a simplified block diagram of a automotive automa-tion/security system comprising this invention;
FIGURE 2A is a schematic diagram of the control module of the security system depicted in Figure l shown on two drawings for clarity;
FIGURES 2B and 2C are schematic diagrams of two alternate embodiments of the soft-chirp output feature;
FIGURE 3 is a schematic diagram of the radio-frequency receiver section of the control module depicted in Figure l;
FIGURE 4 is a schematic of the radio frequency remote-control transmitter depicted in Figure l;
FIGURES 5A and Sb are flow charts of the means for deleting chirps/soft chirps using the remote-control transmitter without losing any of the security systems other functions;
FIGURES 6A, 6B and 6C are flow charts of the feature allowing multiple levels sensor inputs controlling multiple levels of output device notification;

SUBSTITUTE SHEET (RULE 26) _ CA 02220l0l l997-l0-3l W096/3i6949 PCT~5~SJO~
FIG~rREs 7A-7H are flow charts of the means ~or using a l:Lght sensor i~LpUt to a security system, allowing the system controller to control the vehicle's light systems;
FIG~RES 8A and 8B are flow charts of the means for monit:oring the input: ~ensors of the security system, to bypass them after a prolonged period of instability and, after a given period of stability or when the ignition is turned on, while the sec:urity system i~ disarmed, readmit them to the system;
FIG~rRE 9 is a flow chart of the means for entering or e~iting "valet" mode using the security system's remote-control transmitter;
FIG~RES lOA-lOC are flow charts of the means for remote-starting the vehicle while maint~;n;ng maxim~m security and safety;
FIG~rRE 11 is a flow chart of the means for programming the selectable operational functions using the remote-control transmit-ter;
FIG~rRES 12A, 12B, and 12C are flow charts of the mear~s for testing i~ security system installation and its radio-frequency remote-cc~ntrol transmitter range;
FIG~RES 13 and 14 are flow charts of the means for rest:oring a security system status after a power ~;sconnect; and, FIGU~RES 15 and 16 are flow charts of the means for genera~ing soft chiIps by plllc; ng the siren output during chirps or redu(:ing the siren output voltage/current during chirping.

BEST MODE FOR CARRYING OUT THE lNV~N~ ON
FIGU~E 1 represents a simplified block diagram of the primary functional components of the automotive automation/security sy~tem of this invention. This invention may be used in other areas and the desc~iption of its use in a vehicle should not be ta~:en as l; m; ting it in any way. The security system generally involves the interaction between a user and the system controller to obtain the various functions and features of the invention. This invention includes a radio-frequency (RF) remote-control transmitter 25 and a control module 29. Control module 29 includes SUBSTITUTE SHEET (RULE 26) a RF receiver 33, which receives a digital encoded signal transmitted via receiving antenna 31 from remote-control transmitter 25 via its antenna 27. Controller 35 and an e~ternal electrically programmable and erasable read-only memory EEPROM 37.
The incoming digital signal code is either presented directly to controller 35, for decoding, or as an alternate means to a system integrated circuit decoder for decoding to give the proper chAnn~l output corresponding to the transmitted chAnnel.
The user may employ a plurality of system hardware to generate inputs, generally shown along the left side of controller 35, for cnrmlln;cating commands to the controller. Such hardware may include program switches, jumpers, or jumper pins, valet switches, ignition switches, and door switches. Most co~n~ are Co~
cated to the controller during normal use of the vehicle, such as turning the ignition on or off and opening or closing the vehicle door. The remote-control transmitter 25, in the hands o~ the operator or user, can issue operational, operation function progr~; ng, and operational testing commands to controller 35.
These commands include a stream of 29 binary bits of data that are assembled in a fi~ed sequence to form the particular user code for a given command. These codes are preset by programming either by the manufacturer, the installer or the user.
The vehicle battery supplies power to the control module 29.
The vehicle provides a nominal 12.6 volts direct current (DC) power to all powered inputs to the control module. Power supply 39 filters and regulates the power to supply either 5 or 12 volts as required to components of the control module. The RF receiver 33 power is further isolated and filtered-by an additional resistor and capacitor (RC) filter 41. The remote-control transmitter 25 is powered by either a 9-volt or 12-volt miniature Al kAl; n~ battery.
Remote-control transmitter 25 as shown in ~igures 1 and 4, in the most preferred form, provides a pulse-width-modulated radio frequency signal, wherein an RF carrier at some predet~rr; n~
frequency is modulated (turned on and off by variable pulse widths) by pulses from an internal encoder-integrated circuit 529. Remote-SUBSTITUTE SHEET (RULE 26) _ WO 96/3694~ PCI'IUS9 ,/n6C3n control t:ransmitter 25 is comprised of the chAnnel selection section 50CI, the transmit indicating LED 517, the battery 519, the encoding section 520, and the RF transmitting section 534. As i~ well-known in the art, remote-control transn~tter 25 is normally actuated by depressing one or more switches 501, 503, 505, or 507, located in the remote-control transmitter 25 CA-~; ng, to generate a distinct RF signal encoded with the information ~rom encoder integrated circuit 5Z9.
Encoder 529 generates a 29-bit binary digital code; the pulse width of each pulse det~r~;ne~ i~ the code bit is a zero or a one.
The speci~Eic code of a particular remote-con~rol transmitter 25 is det~rm;ne-~ by 12 trinary inputs controlled by cutting traces 523 and the remote-control transmitters switches 501-7. An optional resistor 525 and switch 527 allow the user to double the olutput ch~nn~l capability of remote-control transmitter 25. LED~ 517 indicates when the remote-control transmitter 25 is active. Battery 519 supplies power through LED 517, channel ~election section 500, to encoding section 520 and RF transmitting section 534.1 A
resistor 521 protects the battery from a dead short if neither a positive nor a negative trace is cut on one of the encoder trinary-input coding pins. A clock-adjust resistor 531, coupled to encoder 529, controls the width of all o~L~uL pulses.
An output drive resistor 533, coupled to encoder 529, pas~es drive curIent to the base of the remote-control transmitter's RF
oscillator transistor 543. RF transmitting section 534 comprises a Colpitts, ~scillator that includes CArAC; tors 535, 541, 537,, and 547, a transistor 543, an emitter resistor 545 and inductors 549 and 551. Inductor 549 acts as a power supply decoupler while inductor 551 acts as the printed circuit board antenna loop. Said antenna loop is the source of the RF signal generated by remote-control transmitter 25. A capacitor 553 is provided as a power-supply RF de-coupling capacitor.
Receiver 33, of the super-regenerative type, as shown in Figure 3 includes a local RF oscillator 419 section, comprising a tuning capacitor 427 and an inductor 435 that are driven by a SUBSTITUTE SH~ET (RULE 26) WO 96/36949 PCT/US9 ,/06C9~3 tra~sistor 437. The encoded RF signal is received through antenna 31, which may be a length of wire approximately one-half wavelength long. It is then AC-coupled by capacitor 415 to the emitter of the common base amplifier 399. This common base amplifier acts as an impedance-matching circuit for the antenna input and as an RF de-coupling isolator for the local super-regenerative oscillator to m;n;~;7e RF fee~hAck into the antenna- Capacitor 413 couples the amplified RF signal from the input amplifier 399 to oscillator 419.
Oscillator 419 actually includes two coupled oscillators; a low-frequency oscillator (capacitor 431 and inductor 439) that sweeps the high-frequency oscillator (capacitors 427 and inductor 435) over a wide range of frequencies via coupling capacitor 429. The low-frequency oscillator is referred to as a ql~ench;ng oscillator and also the quenching signal is sometimes injected from an e~ternal oscillator. An on-frequency RF signal injected into the high-frequency oscillator through input capacitor 413 causes the oscillator to go into oscillation prematurely, cAtlc;ng a change in duty cycle of the low-frequency quenching oscillator. This duty-cycle shift is detected at emitter resistor 441 and DC-coupled through resistor 445 to an RF filter capacitor 451 located in an amplifier 444, which filters out the high frequencies of both local o~c;llAtors, leaving a digital pulse train identical to that generated by encoder 520 in remote-control transmitter 25 except for amplitude.
A resistor 453 and a capacitor 465 further filter the pulse train to provide automatic gain control (AGC) reference to an operational amplifier 463. An input resistor 449 and a feedback resistor 461 establish the gain of amplifier 463. The output of amplifier 463 is then AC-coupled via a cArAc;tor 469 to an amplifier 458, which is set up as a Schmitt trigger, in that any signal at the input e~c~e~; n~ a predete~r;ne~ reference level causes a rail-to-rail shift at output 67. The receiver output signal at output 67 is now ready for decoding to see if it is a valid control signal.
OuL~uL from receiver 33 is then fed to an RF input 67 of SUBSTITUTE SHEET (RULE 26) WO 96/31S949 PCT/USgS/U60~1 controller 35, as shown in Figure 2A, for decoding to det~rr;ne if the input: is a valid control input. To establish validity, controller 35 must compare the input with the previously progra~med remote-control transmitter 25 codes stored in EEPROM 37. Controller 35 in thi; case comprises a National Semiconductor CoP880 microcon-troller w:Lth read-only memory (ROM) and random access memory (RAM).
If controller 35 receives a valid control signal, it responds to this signal by generating an output or outputs according to the control sLgnal received, the operational mode of controller 35, and the status of the other inputs at the time the signal is received.
As shown in Figure 2A, the security system inputs are indicated at 69, 79, 89, 121, 131, 141, lSl, 171, 191, 193, 197 and 203, and e~ach input is buffered by its own individual input buffer circuit. For example, for input 69 (sensor "lock" in Figure 1) the buffer circuit comprises an isolation resistor 71, a filter, a capacitor 73, an isolation diode 75, and a pull-up resistor 77. All other inputs have similar ~ilters, dep~n~;n~ on their application as is known in the art. E~amples of these sensor elements are shock sensors; field-distll~h~nre sensors (radar); door, hood, trunk, or ignition switches; audio discriminators (glass-break) sensors; a~nd light sensors.
When the security system is armed, and at other times as required, all the inputs are continllA~ly monitored as to the status of the inputs or the change thereof. Some inputs are assignled to various zones for convenience in monitoring the specific are,~s of the vehicle such as sensors, doors, hood or trunk, etc. These inputs are buffered for voltage transients and surges dep~n~;ng upon the type of input. For e~ample, positive triggered inputs are the positiLve door circuit Figure 2A 171, the ignition input 151, and the light sensor input 197/203. The sensor inputs 69, 79, and 89, valet 121, instant (hood/trunk) 131, and negative door 141 are triggered by negative inputs. The valet input comes from depr~cc;ng a dash-mounted valet switch 122. The wiper input 193 is programmable positive or negative by use of a jumper pin shorting connector at the input selection connector 349. The fact that all SUBSTITUTE SHEET (RULE 26) these inputs go independently directly to controller 35 allows it to monitor the status of each input separately, as well as to be able to independently disable unstable inputs, and allows for m~;mll~ security with the balance of the inputs when any one input becomes unstable and is disabled. This greatly ~nhAnces the C~Ah; 1; ty of the advanced self-diagnostics to help maintain the ~;mllm security possible when inputs become unstable.
The security system further includes multiple audio, visual, and electronic output devices. These are indicated in Figure 2A at 107, 233, 235, 269, 281, 291, 305, 313, 321, 329, 337, and 345.
E~amples of these output devices are sirens (either electronic or ~ch~n;cal) and/or synthesized voice outputs 233 or 235, lights (head, rllnn;ng/ and dome) 281, door actuators (locking/unlocking motors) 269, device enabled 313 (while the system is armed), trunk-release solenoid 281, dash mounted LED 107 (red/green), starter disconnect 305, horn 345, a remote pager, an autodialer, window roll up/down motors or other control modules, such as remote car-start module, and other vehicle security system sensors. Any All~; 1 ;~ry output ch~nnel can be used to control other electrically controlled devices as required by the user.
As shown in Figure 2A, all the outputs are generated by controller 35, but well-buffered by the different output devices, dep~n~; ng on the output in question. The power output from controller 35 is buffered by a power invertor 225. It is used to minimize the standby power drain of output power amplifier 263.
This power ampli~ier 263 is a push-pull amplifier with current l;~iting and th~r~-l shutdown that drives an output speaker connected between outputs 233 and 235 with synthesized voice audio signals from a voice synth~Q;7er 239 or a synthesized siren sound audio signals from si~-tone siren synth~Q;7er 257. The lock and unlock control signals are inverted by power invertors 267 and 265 respectively and sent to a three-pin door-lock control conn~ctor 269 via printed circuit board conductors that are not numbered in any o~ the Figures. A five-pin relay drive connector 281 receives its control signals from invertors 273, 275, 277, and 279 to drive SUBSTITUTE SHEET (RULE 26) CA 02220l0l l997-lO-3l WO 96/3~,949 PCT/US95~ C9~
control relays in an external module for all~; l; ~ry chAnnel 2, rllnn;ng 1 ights, dome lights and headlights. Four more al~i l; A~y output chAnnel~ and three other outputs are driven by output power transistors and provided with relay kickback protection di odes .
They are chAnn~l 3 at output 291, starter disconnect at OUtpUI: 305, ground when armed at output 313~ chAnnPl ~L at output 321~ chAnnel 5 at output 329 ~ chAnn~l 6 at output 337, and horn at output: :34s .
LED 107 visual outputs, either red or green or both red and green, will give~ a visual indication of the status of the security ~;y:;tem at all ti~nes.
A connLector at 191 is used for enabling/disabling the radio frequency remote-control transmitter 25 proc~ram mode of contro:Ller 35. The jumper must be removed to program the systeml s remote-control t ransmitters .
The clock speed of the microcontroller is 10 T~cJAhertz cmd is established by quartz crystal 103, cA~Ac;tors 99 and 101, and a resistor 105. Controller 35 clock, in conjliLnction with contro:Ller 35 program, establ; ~hec all of the system' s timing.
The controller reset is generated by an active reset ci rcuit consisting of resistors 49, 51, 55, and 61; transistors 57 and S9;
diodes 53 and 65; and rArAr;tor 63. When the 5-volt supply voltage drops below 4 volts, the ref erence at the base of transistor 57 drops below the recluired transistor turn-on voltage, which c:auses transistor 57 to turn off. When transistor 57 turns off, it removes the ground at the base of transistor S9, allowing the pull--up resistor 5S to pull-up the base of transistor 59, which turns on transistor 59, generating a reset .
The 12.6 volts DC power for control module 29 enters at 295 a~Ld the ground return exits at 299. A ceramic disc c Ap~C; tor 297 is provided as a radio-frecluency filter rAr~c i tor located aLt the power input. A diode 285 is provided as a reverse-protection power diode. Capacitors 229 and 221 are provided to act as a power-supply regulator pre-f ilter and post-f ilter respectively . A
voltage regulator 223 is provided and preferably is a 5-volt m.icro power, 100--milliampere regulator. CerAln; c disc cArAr; tor 217 and SUBSTITUTE SHEET (RULE 26) WO 96t36949 PCI~/US9~,/O~C9~3 the ferrite beads 215 and 219 are provided on the power traces o~
controller 35 to reduce radio frequency ~; Q~; ons therefrom which aids in ma~imizing the range of on-board RF receiver 33.
The first alternate embodiment of the soft-chirp feature is shown in Figure 2B and shows that during chirps, the siren output 359 would be pulsed at a low-duty cycle rate, and a resistor 361 would limit the current of the pulses as the power is stored in a capacitor 363. A base drive resistor 365 is provided to limit the current from the limited power stored in c~r~c;tor 363 to the point that transistor 369 only pulls the input to base drive resistor 367 to, for e~ample, a +10 volts instead of ground. Base drive resistor 367 input only being pulled to +10 volts supplies a very limited current to siren output transistor 371, which then only supplies a very limited current to siren output 373. This limited output current may only generate a voltage of, for example, 2 volts across the siren, which would significantly reduce the output volume of the siren chirps. During normal siren output, the output at 359 would be on continuously, supplying a hard drive to pre-drive transistor 369, which in turn would supply a hard drive to siren output drive transistor 371, which would then supply sufficient current to develop a full 12 volts across the siren, which would develop a full-siren volume.
A second alternate embodiment is shown in Figure 2C and uses a separate output 375 from controller 35 to supply a limited drive to the siren output drive transistor 371. The output 375 from controller 35 would be on continuously during chirps. Base drive resistor 377 would then deliver current from the output 375 to turn on hard chirp pre-drive transistor 381. In this case, the base drive resistor 379 would be chosen to limit the drive current supplied to the siren output transistor 371, such that the current supplied to the siren would be limited signi~icantly, pro~--c; ng a chirp of a much lower volume. Another embodiment for generating a so~t chirp would be to use the alternate routing of the printed circuit board conductor as shown in Figure 2C in dotted line. In this case, the l;~;ting of the output power would be accompl;~he~

SUBSTITUTE SHEET (RULE 26) WO 96/369~9 PCT/US95106098 by choosing the appropriate value of base drive resistor 377.l~sing a large-value resistor at 377 would limit the base drive current to the chirp pre-drive transistor 381 so that the voltage at the input to base dr.ive resistor 367 would be, for e~ample, 10 volts. This would limit the base drive current available to siren output drive transistor 371, thereby reducing the output current to the siren, which wou:Ld produce a reduced-volume chirp.
The security system of this invention is comprised of a m~mber of important new features and $unctions. The first such feature is the "silent" mode as shown in Figures SA and SB. The silent mode is the deletion of the siren chirps or syn~hec;~ed voice that normally accompany the arming or disarming of the vehicle security system. As is well-known in the art, most of today's ri~dio-frequency remote-controlled vehicle-security systems acknowle~dge the confirmation of the arm/~;SAr~ commands with siren chirps, synthec;7ed voice output and light flashes. ~ost of these security systems have the capability to p~r~n~nt]y disable the audio portion of the acknowledgments by use of program switches, jumpers, or changes in the system's operating program. A few seclarity systems have the capability to selectively disable these ~udio acknowl~r-nts via the RF remote-control transmitter, but in all those instances, something is lost in the process. One such security system uses an All~; 1; Ary remote-control chAnnPl to disable the audible acknowledgment, but loses the u~e of that ch~nnel for other functions. Another uses a single remote-control transmitter chAnnel, but the audible acknowledgment is delayed until a second signal is transmitted on the same chAnn~l and received. In this case, how,ever, the delay becomes a nl~;CAnce to the user, and, further, if the first signal is not received, the second signal could be received as a first signal and cause the audible arming notification signal to be generated.
The D~ethod of selectively deleting the audio acknowled~ment while using the RF remote-control transmitter 25 to arm and disarm the vehicle security system in this invention eliminates both of these shortco~;ng-c. The programmed chAnn~ 2 of this invention has SUBSTITUTE SHEET (RULE 26) CA 02220l0l lgg7-lo-3l wo96l3694s PCT~S9S/o6os8 a built-in chAnnel-conf; rmAtion delay before the output pulse is generated. The ch~nnel 2 output is normally used for trunk release and has a built-in 2.5-second delay to prevent inadvertent release of the trunk. To silence the audible acknowledgments, the user presses chAnnel 2, cAllQing controller 35 to look for a chAnnel 1 input within the next 5 seconds. Upon receipt of this chAnnPl 1 input, controller 35 will delete all audible acknowledgments of Ar~; ng/disarming. The invention requires no loss of an au~iliary chAnnPl or the inconvenience of not having ;~-~;Ate acknowledgment of arm/~ r~ control signals.
ReferPnc;ng Figures 5A and 5B, when controller 35 confirms an input from remote-control transmitter 2S c~Annel 2, at 601, a time check is then made at 603 to determine if controller 35 should generate the trunk-control pulse or start the chirp-delete period.
If channel 2 validity is confirmed for two and one half seconds, controller 35 proceeds to 605 to generate a trunk-control pulse to unlock the trunk. If not, controller 35 proceeds to 607, where the five-second audible acknowledgment deletion timer is started, then to 609 where the deletion flag is set. Thereafter, controller 35 returns to the normal operating mode to wait for other events to occur. If a security system arm/disarm command (from chAnnel 1) is conf; rmed at 615 at this time, when controller 35 chP~k~ the audible acknowledgment (chirp) flag and finds it set at 617, controller 35 will bypass generating the audible acknowlP~l~r~nts at 619. When the deletion timer runs down to zero, an interrupt will be generated. When it is determined that the interrupt is a deletion timer interrupt, the interrupt processing routine at 611 is entered where the audible acknowle~i~r~nt (chirp) deletion flag is reset at 613.
Another feature of the invention is the addition of three new sensor-input cApAh;l;ties when the security system is armed: warn-away-only sensor input, dual level/warn-away with full-alarm trigger-sensor input, and a two-step door input. In the warn-away only sensor input, the warn-away-only input will not activate the full alarm mode of the security system, but on each new occurrence SUBST~TUTE SHEET (RULE 26) -WO 96/3694g PCTIUS~S~C~5~
o~ the input will generate several seconds of slren chirps or synthec;7ed voice output. This greatly reduces the n~ nce oi t:he security system for users who like their sensors highly sensitive.
In the caC~e of a field-disturbance sensor set at or near ~ -m sensitivity, the warn-away sensor input can generate sevelal seco~c of warn-away audible outputs if so~o~e comes too near t:he vehicle even without to--ch; ng it. Several seconds of chirps or syn~hec;7ed voice is less of a n--;CAnce than a ~ull duration oi t:he security system full-alarm mode.
In the dual level/warn-away with ~ull-alarm trigger-se!nsOr input, the dual-level sensor input will generate just the warn-away audible out:put the first time it is activated. If another activation of this sensor input occurs within about l0 se~o~s, it will trigger the full alarm mode of the security system; if not within the l0 seconds it will trigger only the warn-away aucLible output. In the two-step door input ~eature, upon opening 1;he door controller 35 generates several seconds of chirps or ~oice warn-away a~ter which controller 35 will move to the full al2lrm mode unless it is disarmed by the user using the transmitter 2~;.
The warn-away dual-level, and two-step features are depicted in Figures 6A, 6B and 6C and show the microcontrc,ller operations of these ~unctions. If the warn-away input is activa1:ed at 631, controller 35 proceeds to generate several seconds of ~;iren chirps or synth~c;7ed voice at 633 after which it returns to the normal armed mode. When the dual-level sensor is activated at 62l, controller 35 ch~ck~ to see if the input has been activated in ~he last l0 seconds at 623. If the input has been activated in the last l0 secc~nds, the security system enters the full-alarm mocle at 629 after ~hich it returns to the normal armed mode. If the input had not be!en activated within the last l0 s~co~-; the l0-second timer at 625 is started and controller 35 goes into the warn--away mode and generates several seconds of siren chirps or syn~h~c:;~ed voice output at 627 after which controller 35 returns to the normal armed mode.
The two-step door input feature is shown in Figure 6C. Wllen SUBSTITUTE SHEET (RULE 26) WO 96/36949 PCI~/US5510~C9~
the input is activated at 637 by opening a door, controller 35 generates several seconds of siren chirps or synthesized voice output at 639. Controller 35 will always go into full alarm mode at 645 if controller 35 is not disarmed at 643 by tr~nqr;s~;on from remote-control transmitter 25 on chAnnel 1 at 641.
The next innovative feature of the invention, termed the "Nite-Lite" is shown in Figures 7A through 7H. The Nite-Lite feature uses a light sensor, such as a photoresistor, mounted on the dash panel. It is used to measure the level of the available light so that controller 35 may control the lights of the vehicle under various circumstances. Further, controller 35 controls the lights of the vehicle under entirely different circumstances.
With respect to the light sensor used to control the lights as it relates directly to the security system, Figure 7A shows the basic function of the "Nite-Lite". When the security system is armed or disarmed, day or night, controller 3S flashes the r~nn;ng lights one to four times upon receipt of the trAn~ Q; o~ from remote transmitter 25 chAnnel 1. When the security system enters full-alarm mode during daytime, controller 35 flashes the rl~nn;ng lights for the duration of the alarm condition. When the security system is armed at night, the heA~1; ghts and r~lnn;n~ lights are turned on ~or 20 seconds; when the security system is disarmed, the h~A~l;ghts and rllnn;ng lights are turned on for 20 seconds or until the ignition is turned on, and the dome light is turned on for 60 s~con~ or until the ignition is turned on. During the full-alarm mode at night, the heA~l;ghts are turned on and the r~nn;ng and dome lights are flashed for the duration of the alarm condition.
When the user is driving the vehicle, the light sensor will turn on the heA~l;ghts and r~nn;n~ lights at a predetermined lower light level after a predetermined delay, and turn them off at a predet~r~;n~ higher light level after a predeter~;ne~ delay. Also, when the vehicle w;n~h;eld wipers are turned on in daytime, even in the intermittent mode, after a predet~rr;ne~ delay, the h~A~l; ghts and running lights will be turned on. At night, if the h~A~l;ghts and rllnn;ng lights are on (system was just disarmed) SUBSTITUTE SHEET (RULE 26) WO 96/3~;949 PCTIUS~51~16C93 when the u~ser enters the vehicle and the ignition is turned on, t:he lights will go out for ~ive seconds to allow ~or crAnk; ng of. t;he ~ng;n~, then turn back on. Under control of the "Nite-Lite", cmd the vehicle is being operated with the lights on, when the igni.tion is turned off, the lights will go off for five seconds and then come back on. and remain on for 20 seconds to allow for safe eglress ~rom the vehicle. If the lights remain on when the ignition is turned o~f, this draws attention to the user to turn of ~ the li~ht switch.
Other features of the Nite-Lite include a system light sensor 198 and an override switches 200 and 204 in both directions They are two sinsrle pole switches connected to wires 199 and 201 in. one position a:nd 197 and 203 in the other position. Light sensor 1.98 is in series with switch 200. Actuating switch 204 (connecting 201 and 203) causes controller 25 to interpret the input as dayti~e;
deactuating switch 200 (~;~co~necting 198 from wire 197). Throwi.ng the switch one way (shorting 201 and 203) causes controller 35 to interpret lthe input as daytime; throwing it the other way (opening the light sensor input and 199 tground]) causes controller 35 to interpret the input as night time. "Safe-Lite" is the name given to the open or always-night characteristic of the Nite-Lite featu.re o~ the invention, but it can still use the light sensor to det~rr;n~ wh,ether it is day or night. Safe-Lite provides for safer driving since the headlights and rllnni ng lights will always be on when the vehicle is being driven (the ignition is on). Another feature of the Safe-Lite when l;nkP~ with the light sensor is to connect the h~A~l;ghts in series during the day time, as an energy-conservation measure, while cont;nll; ng to run them in parallel at night to obtain ma~imum brightness.
In Figure 7A, if the ignition is not on at 667, controller 35 goes to the Nite-Lite ignition-off routine at 669, reference Filgure 7B. If the ignition is on at 667, controller 35 ch~rk-c to se,e if there has been a light-level threshold change at 671 and, if t:here has, controller 35 proceeds to the Nite-Lite light intenlsity routine at 673, reference Figure 7C. If no change has ]been SUBSTITUTE SHEET (RULE 26) CA 02220l0l l997-lO-3l W096/36949 PCT~S95/06098 recorded, controller 35 proceeds to check if it is day or night at 675. If it is night, controller 35 proceeds to check if ignition has just been turned on at 683. If it has, controller 35 turns off all lights at 685, starts a five-second "ignition on" timer at 687, and returns to the main program. If at 675, it is day time, controller 35 checks for wiper or Safe-Lite at 677 and proceeds to the appropriate wiper 6 79, reference Figure 7D, or Safe-Lite 681, reference Figure 7G, routine.
If the ignition is off at 667 in Figure 7A~ the security system proceeds to the ignition-off routine 669~ as shown in Figure 7B. If the ignition has not just been turned off at 689, controller 35 goes to the security routine 691, reference Figure 7E. If the ignition has just been turned off at 689, controller 35 checks to see if it is day or night at 693, daytime, controller 35 returns to the main program; otherwise controller 35 turns off the he~l;ghts and rllnning lights at 695, and starts a five-second ignition-off timer at 697, before returning to the main program.
If the ignition has been on for a measurable period, when the "Nite-Lite" routine is entered, controller 35 proceeds to 673, as shown in Figure 7C, where controller 35 chPckc the direction of the change at 707, since it has already been establ;cheA that a change has occurred. An upward change [it is getting lighter] starts the 30-second lights-off timer at 709 and returns to the main program.
A opposite or downward change starts the 30-second lights-on timer at 711 and returns to the main program. Thirty second delays are required to prevent controller 35 from turning the lights on and off every time controller 35 encounters brief periods of light change, such as when the vehicle goes under an overpass, etc.
Figure 7D represents a basic concept of the w;n~ch;eld-wiper routine. The system will operate with intermittent wipers even if they only operate once ever 15 ceco~C. In other words, if the light-sensor input goes active for a short period every 15 seconds, controller 35 will register it as a continuous input, keep the lights on or turn them on 30 seconds after the first input. The actual w;n~ch;eld wiper input circuit is as given above, but it is SUBSTITUTE SHEET (RULE 26) WO 96/36;949 PCT/US9~,/a60:~û
preferable to have a direct w; n~ch; eld wiper input to interface with the program to fuDLction as above so the light-senLsor circuit will not be af~ected by the intermittent w;n~ ch ' eld wiper input function. At 721, controller 35 checks to see if the w;n~h;eld wipers ha~Je just been turned onL. I~ they have, the 30-~econd Nite-Lite lights-on timer is started at 723, before returning to the main program. If not, controller 35 returns directly to the main program.
The Nite-Lite security system routine shown in Figure 7E
controls the lights according to light conditionLs at the t:Lme a security function occurs. The first check is to see if- the security system has been just armed or disarmed at 731. If not, controller 35 proceeds to the alarm routine 733, reference Figure 7F. If 1the arming state has just changed, a check is made to det~rr;n~ if the security system was armed or ~;cArmed at 735. In both case~s, controller 35 then checkq for day or night conditions at 737 anld 741. If day conditions, co~Ltroller 35 leLuL~s to the main program, where another routine (not Nite-Lite) flAQhP~ the rllnn; ng l:ights one to four times.
If the security system was just armed at 731/735 and it is night conclitions at 737, controller 35 turns on the heA~l;ghts and rllnn; n~ l:ights at 739, then starts a 20-second lights-on tim~ar at 743 before returning to the main program. If the security s~ystem was just ~; ~Ar~e~ at 731/735 and it is night conditions at 741, controller 35 turns on the h~l; ghts and rllnn; n~ lights at 7~5, starts a 20 second lights-on timer at 747, turns on the dome lights at 749, aLnd starts a 60-second dome-light timer at 751 b~afore returning to the main program.
The Nite-Lite alarm routine 733, as shown in Figure 7F, controls the lights during a full-alarm mode of the security system. C:ontroller 35 rechecks to see if the security system has just gone into the full alarm mode at 759. If no full-alarm mode e~ists, controller 35 LeLuL~s to the main program. If a Eull-Al Ar~ mode does exist, controller 35 check~ to see if it is day time or night time at 761. In daytime, controller 35 flashe~s the SUBSTITUTE SHEET (RULE 26) WO 96/36949 PCTltJS9J106C9$
rnnn;ng lights at 763 for the duration of the alarm. At night, controller 35 turns on the heA~l; ghts and flashes the rl~nn;ng and dome lights at 765 for the alarm duration.
Safe-Lite is the capability of the Nite-Lite feature that turns on the h~A~l;ghtS and rllnn;n~ lights any time the ignition is turned on. In Figure 7G, the light sensor allows the Safe-Lite feature to turn on headlights in series at 771 or in parallel at 767, dep~n~;ng on whether it is day or night at 769 respectively.
The Nite-Lite feature requires several timers that all generate interrupts when the time expires. This requires a routine to process these interrupts as shown in Figure 7H. The first item checked in this routine is whether the ignition is on or off at 775. If it is on, controller 35 cherk.c for on or off timer at 777.
An off timer will turn off the he~l; ghts and rl~nn;n~ lights at 779, while an on timer will turn on the headlights and rllnning lights at 781. If at 775 the ignition is not on, controller 35 again proceeds to check to see if it is an on or off timer at 783.
The on-timer interrupt turns on the headlights and rllnn;ng lights at 789 and starts a 20-second on timer at 793 before returning to the main program. The off-timer interrupt ch~ckq to see if the interrupt is for the headlights and rllnn;ng lights or dome light at 785, and proceeds to turn off the appropriate lights before returning to the main program. At 787 controller 35 turns off the dome lights, while at 791 controller 35 turns off the heA~l; ghts and running lights.
Another feature of the invention is shown in Figure 8A and is an advanced input-diagnostic and input-bypass CArAh; 1; ty in which an unstable input is bypassed (disabled) after starting four full-alarm cycles in one hour. The unstable input is thereafter bypassed for an additional hour from the time of any activation of the input during the one-hour bypass period, and the bypAqq;ng can only be ter~;nAted by the input rem~;n;ng stable for one full hour or the security system being disarmed and the ignition being turned on. Each time an input is activated that causes the security system to enter the full-alarm mode, controller 35 goes through a SUBSTITUTE SHEET (RULE 26) WO 96/3~i949 PCT/U~3S/C~C9U
routine t:hat checks the stability of the input for the last: one-hour peri.o~ or starts a check for the next one-hour period.
The input-bypass routine 79s, as shown in Figure 8A, starts by ch~C~; ng to deter~;ne if the security system is armed at 797. If the syst~em. is not armed, controller 35 check~ to see if the ignition has just been turned on at 799, and i~ it has, controller 35 will re~et all bypass flags, activation counters and associated timers a-t 801 before returning to the main program. If the security system is armed at 797, the input activation-counteI of controller 35 is incremented at 803 and the count is check~A t:o see if the input has been activated ~our times in the last hour at:~o5.
If this is the ~ourth activation, the input-bypa~s flag is set for this input at 807, the bypass timer is set to one hour and started at 811, then controller 35 returns to the main program wi.thout generating an alarm output. If the input was not the fourth activation in one hour at 805, controller 35 ch~ckQ to see if the bypass flag has been previously set at 809. If it has been set, controller 35 proceeds to 811. If the flag is not set at 809, controller 35 check~ to see if the input-bypass activation timer is r~nn;ng at 813. If it is not~ it means this is the ~i.rst activation of this input. Controller 35 then proceeds directly to 819, where the input-bypass activation timer is reset to zero and started. Thereafter, controller 35 proceeds to the full-alarm mode at 821. If the timer is running at 813, a check is made to see if the timer is above or below one hour at 815. If it is above one hour, thi.s input has not triggered in the last hour, so the activation counter is set to "1" at 817 and the timer is reset: to "0" and started, before going to the full-alarm mode at 821. If the input-activation timer is below one hour at 815, controller 35 proceeds directly to the full-alarm mode at 821. There i~s one input byp;~ss timer in controller 35 for each input that has been activated. If an input-bypass timer decreases ("decrementsl~) to zero, an interrupt is generated, c~ ;n~ controller 35 to go to the bypass-timer interrupt proceC~; ng routine at 827, as shown in Figure 8B. This resets the input-bypass flag for the appropriate SUBSTITUTE SHEET (RULE 26) input at 829, then returns to the main program.
Another feature of the invention is the capability of putting the security system into and out of "valet" mode by using tran~mitter 25 and one of the vehicle's doors, as shown in Figure 9. This simplifies the entry and e~it of "valet" mode for the user. The security system still has the capability to enter or e~it "valet" using the dash mounted system valet switch when the ignition is on.
The routine begins at 833 and, as shown in Figure 9, by disarming the security system at 835, opening a door of the vehicle at 839; and conf;rming receipt of a signal from security system remote-control shAnn~l one at 837. Then, within two seconds at 845 and 849, conf;rm;ng receipt of a trAnC~; .eS; on from security system remote-control chAnnel two at 847, and again within two s~co~ at 851 and 855 conf;rr;ng receipt of a trAn~ e;on from remote-control chAnnel one at 853. Controller 35 toggles the valet function at 859. During the process, controller 35 will always toggle into the arm mode at 843. If at any time during this operation the constraints specified above are not met, controller 35 will toggle between the security system arm/disarm modes at 841 and 857.
Programming one of the security system's All~;l;Ary control ~h~nnel~ ~chAnn~l 3], to operate a remote car-start module, is another of the invention's features and is shown in Figures lOA-C.
This ~ApAh;l;ty is enabled or disabled when the system operational functions are proyl -~. By customizing chAnnel 3 to be used as a remote car-start output chAnn~l~ the security system can disable the sensor inputs (radar, shock, motion, etc.) while maintA;n;ng a significant level of security by keeping all the other inputs active when the security system is in the armed mode.
In car start routine 871, when receipt of remote-control transmitter 25 chAnn~l 3 is conf;r~~~ at 873, controller 35 checks to see if chAnn~l 3 has been programmed for car-start mode at 875.
If it has not, the all~il;Ary chAnnel 3 output is turned on for the duration of the control-chAnn~l confirmation at 877 (as long as the SUBSTITUTE SHEET (RULE 26) WO 96136i949 PCI~/U~55~ C0:~
remote-control transmitter 25 button is depressed), before returning to the main program- If remote-control transmitter 25 ~hAnnel 3 is programmed for car start, then the car-start flag is set at 879 and a check is made to see if the security system is armed at 8~1. If the security system is not armed, the doors are locked at 883, chAnn~l 3 output is turned on for the duration of chAnnel confirmation at 887, and the car sta~t ~;~Ar~-~ flag is set at 891 before leL~L~ing to the main program. If at 881 the security system is armed, controller 35 turns on chAnnel 3 output for the duration of the trAn~ ion of remote-control transmit;ter 25 chAnnel three conf;rmation at 885, sets bypass flags for sensor inputs one and two at 893, then sets chAnn~l three car-start armed flag at 895 before returning to the main program.
In the chAnnel 3 car start disarmed flag routine 903, as shown in Figure! loB, when receipt of a trAn! ;~-~;on of remote-control transmitter 25 chAnnpl one is confirmed at 90s and the ch~nn~l three car-start flag is on at 907, the security system unlocks the vehicle's doors, resets the car-start disarmed flag and the car-start flag at 911, before returning to the main program; otherwise rhAnnel 1 operations are normal for the main remote-cont:rol transmitter 25 chAnnel 1, at 909. In the ~hAnnel 3 car start armed flag routiLe 917, as shown in Figure lOC, with the car-start armed flag set when receipt of remote-control transmitter 25 chAnnell :L is conf;rmed at 919 and the chAnnel 3 car-start flag is on at 5~21, controller 35 resets sensor one and two bypass flags at 925, disarms t:he security system, unlocks the vehicle's doors, and resets th,e car-start-armed flag and the car-start flag at 927, before returning to the main program; otherwise, chAnr operations are normal at 923.
Another feature of the invention allows all system-proyL --ble operational functions to be selected using the security ~ystem remote-control transmitter 25. Function programming is shc,wn in Figure 11 and is accompl;~h~ by using the security system~s noImal inputs (door, ignition, and valet) to put the security system into the function programming mode, then using the security syctem~s SUBSTITUTE SHEET (RULE 26 WO 96/36949 PcT/u~3~ c~c9u remote-control transmitter 25 to toggle the operational function to the desired state.
In Figure 11, the security system must be disarmed at 993, the doors closed at 995, and the ignition must be off at 997 to initiate the sequence required to begin entry into the security-system operat;onAl-function programming mode. The ignition must then be turned on at 999 and the valet switch must be pressed once at 1001 to enter the operational-function programming mode at 1003.
At this time, the state of the first operational-function can be toggled at 1007 using remote-control transmitter 2S at 1005. If the user does not desire to change the state of this function, he or she may advance to the ne~t selected function by deprec~; ng the valet switch once at 1009 for each function at 1015. If one desires to toggle function two at 1013, one activates remote transmitter 25 at 1011. There are only two states of any function, a factory-default state and an alternate state. Accordingly, one chirp denotes the factory-default state, while two chirps denote the alternate state. At any time a particular function is selected, that function's state can be toggled by using remote-control transmitter 25 at lOlS or not toggled by pressing the valet switch to advance the operat;o~Al function selection to the next in the sequence. At any time, the user can e~it the operat; O~A 1 -function programming mode by turning off the ignition at 1017, opening a door at 1019, or stepping through the balance of the programmable operational-functions at 1021.
The next new feature of the security system, the "test mode"
is shown in Figures 12A and will be a great aid to the security-system installer. This feature allows the installer or the user to conduct a complete test of all of the security system's inputs, including inputs from remote-control transmitter 25. Access to this test mode at 1041 is somewhat involved, but the steps are necessary to prevent inadvertent entry which would eliminate the security of the security system. In this test mode, the user may choose any input for testing and the security system will respond with a siren chirp when the input goes active, and another siren SUBSTITUTE SHEET (RULE 26) chirp wh~!n the input goes inactive. At the same time, the security system's light-emitting-diode, LED 107, will indicate the lact two inputs (zo~es) activated.
As shown in Figure 12A, to enter the security-systemi test mode, the security system must be disarmed at 1027-9. Valet sw:itch 122 must then be pressed and held at 1031, the ignition turned on and off at 1033, valet switch 122 released at 1035, and pressed and released ayain at 1037. Controller 35 the~l enters the test mode and acknowledges with a long siren chirp at 1039. While in the test mode, any input may be checked at any time until receipt: o~ a trAn~m;~cion from remote-control transmitter 25 chAnnel 1 is conf; r~-~ at 1077. Thereafter, any particular input may be selected by depre~~; ng the chAnnel 1 button on transmitter 25 the number of times corresponding to the number of that input.
E2amples of input testing are shown in Figure 12A and 12B by numbers 10~3-1071.
For e~ample, when the door is opened at 1043, the siren chirps once to acknowledge the door-open input going active and LED 107 flA~he~ twice at 1045, to indicate that it is a zone 2 input. LED
107 will continue to flash twice at 1045, with a short pause between groups of f 1 ~hec to continue to indicate that zone 2 was the zone from which the last two inputs came. When the door is closed at 1047, the input goes inactive; and at 1049 controller 35 acknowledl~es the door going inactive with another siren chirp, while LE~I 107 cont;nlle~ its fl~ch;ng at 1051. LED 107 will continue 1:o flash as above at 1063 until another input is activated at 1055 or the ignition is turned on at 1053, at which time controller 35 will e2it the test mode and return to the main program.
Tn ~lother e2ample, after the door input is tested, the hood or trunk is physically opened, activating zone three at 1055. The siren chirps once to acknowledge the input going active and LED 107 fl AQh~c 3 times (indicating zone 3), pauses, flashes twice at 1057 indicating that the previous input was from zone 2. When the hood or trunk is closed at 1059, the input goes inactive, controller 35 SUBSTITUTE SHEET (RULE 26) WO 96/36949 PCT/US9~,106C9~
acknowledges the input going inactive with another siren chirp, while the LED 107 continues to flash as above at 1061. Again the LED will continue to flash as above until another input goes active at 1067 (zone 4 acknowledged by chirps at 1069 and zone identification displayed at 1071) or 1075, or the ignition is turned on at 1053, 1065, 1073 or 1083, which in these instances will cause controller 35 to exit the test mode.
If at 1077 receipt of a trAn~;csion from transmitter 25 chAnnel 1 is confirmed for a selected number of times, that selected zone and only that selected zone can be tested at 1079. A
major feature of the security system test mode is the capability to test the range of the transmitter 25 by using any of the chAnnel~
e~cept chAnnel 1. While in the test mode, if any of the al~;l; Ary chAnn~l inputs are confirmed at 1081, the siren will chirp once a second at a test loop comprising 1081, 1085, and 1087 for as long as the input channel is confirmed at 1081. This allows the installer or user to walk away from and around the vehicle to test the range of transmitter 25 without operating any of the security system's functions e~cept for the chirping siren. If the installer or user notices a loss in chirping while in any specific location around the vehicle, control module 29 may be moved to a new location or an exten~r antenna may be added to increase the transmitter range.
Another feature of the invention is the capability of the security system to restart itself after a power failure to the same conditions in effect when the power failure occurred. In Figure 13A, at power-down at 1093, controller 35 checkc for the initiation of its reset function at 1095. If controller 35 has just entered reset, it stores the program counter at 1097, and the operating registers (in RAM) at 1099 in permanent memory, before halting the program. In Figure 15, when power is restored at 1107, the operating registers are restored at 1109 and the program returns to the point it was operating when the power failed at 1111 and 1113.
The last feature of the invention is the capability of the security system to lower the volume of the chirps. As shown in SUBSTITUTE SHEET (RULE 26) WO 96/36949 PCI~/US95/~60g8 Figures 14, 15 and 16, these chirps may either be "softened~l at 1121 using transmitter 25 or programmed for softer operation cluring system operational ~unction proyL ;n~. AS the pulse width of the power pulses is ~;~;n;~hed, the power-output (volume) of the siren is likewise dim; n; ch~. This is shown in Figure 14 where the reduction is set at 90% (a 10~ duty cycle).
In Figure 14, a 100-microseCond timer is started at 1123, the siren outptlt is turned on at 1125, and the program enters a.].oop until the 100 microseconds have expired at 1127- When the 100 microseconds e~pire, the siren-off timer is set to 900 microsecon~c at 1129 and the siren is turned off at 1131, before controller 35 returns to the main program.
In Figure 16, when the siren-off timer decrements to zero an interrupt is generated at 1135, the main chirp timer is decremented at 1137, and checked ~or a value o~ zero at 1139. If the timer is at zero, controller 35 returns to the main program, but i~ it i.s not at zero, the so~t chirp 1121 con~;ntl~Q.
Anot.her means o~ so~tening the chirps is shown in Figures 2B
and 2C where.the output transistor base drive current is redu.ced thereby providing a lower output voltage to the security system siren. This latter method may be accompl; ~h~A in two ways: the output of controller 35 may be pulsed during chirping to a holding c~p~c;tor, thereby re~-lc; ng the output transistor drive current (Figure 213), or a separate controller output. may be used to ~drive the siren output transistor (Figure 2C).

SUBSTITUTE SHEET (RULE 26J

Claims

WHAT IS CLAIMED IS:

1. A security system for monitoring and controlling access to a protected area and having multiple levels of alert signal com-mensurate with a level of security threat to an area, comprising:
a) a plurality of sensor input devices located about a protected area, for providing input corresponding to a level of security threat to said area;
b) means for communicating multiple levels of alert sig-nals, both visual and audible, commensurate with said level of threat received to said area, including:
(i) a low level alert consisting of a voice warn-away, series of audible chirps or blinking lights;
(ii) a medium level alert consisting of a combin-ation of said voice warnaway, series of said audible chirps and said blinking lights; and, (iii) a high level alert consisting of an immediate full siren alert and said blinking lights, wherein said audible siren alert is generated by a voltage at a siren;
c) means for permanently storing system operational parameters within an electrically programmable and erasable read-only memory; and, d) a controller for using said operational parameters for controlling the operation of said security system so that said system operates in an armed mode wherein said controller monitors said input devices and causes said means for communi-cating to issue said multiple levels of alert signals of a level commensurate with and in response to said sensor acti-vated signal, or in a disarmed mode wherein said system is disabled from communicating said alert signals, said con-troller comprising:
(i) means for detecting a sensor input signal corresponding to each said level of threat to said se-cured area;
(ii) means for generating an output signal to said means for communicating said level of alert corresponding to said sensor input signal; and, (iii) means for generating an additional output signal to said means for communicating said level of alert upon receipt of additional input signals from said sensors either at same or higher threat level or within a set period of time following receipt of first said sensor input signal.

2. A security system for monitoring and controlling access to a protected area and having a capability of selectively deleting audible alert signals following arm/disarm mode change, comprising:
a) a plurality of sensor input devices located about a protected area, for providing different inputs of security threat corresponding to a threat to said area;
b) means for communicating multiple levels of alert sig-nals, both visual and audible;
c) a radio frequency receiver and antenna for receiving a digitally encoded transmission, a radio frequency remote control transmitter having means for generating multiple digitally encoded control transmission signals to said re-ceiver; and, d) a controller for controlling the operation of said security system so that said system operates in an armed mode wherein said controller monitors said sensor devices and causes said communicating means to issue said multiple levels of alert signals in response to a sensor activated signal, or in a disarmed mode wherein said system is disabled from communicating said alert signals, said controller comprising:
(i) means for detecting said sensor input signal corresponding to each said threat to said secured area;
(ii) means for generating an output signal to said means for communicating said multiple levels of alert signals corresponding to said sensor input signal;
(iii) means in said controller for decoding said transmissions and processing said sensor input signals;

and, (iv) means for selectively changing audible and visual alert signal to an audio free, visual only alert signal upon receipt of a first control signal transmitted from one channel of said transmitter to said receiver and thereafter receipt of a second control signal transmitted from another channel of said transmitter within a set time period so that said two transmission channels are thereafter available for other programmed functions.

3. A security system for monitoring and controlling access to a protected area and having a manual and remote capability of changing a mode of said security system between a security mode and a valet mode, comprising:
a) a plurality of sensor input devices located about a protected area, for providing different inputs of security threat corresponding to a threat to said area;
b) means for communicating multiple levels of alert sig-nals, both visual and audible;
c) a radio frequency receiver and antenna for receiving a digitally encoded transmission, a radio frequency remote control transmitter having means for generating multiple digitally encoded control transmission signals to said re-ceiver; and, d) a controller for controlling the operation of said security system so that said system operates in an armed mode wherein said controller monitors said sensor devices and causes said communicating means to issue said multiple levels of alert signals in response to a sensor activated signal, or in a disarmed mode wherein said system is disabled from communicating said alert signals, said controller comprising:
(i) means for detecting said sensor input signal corresponding to each said threat to said secured area;
(ii) means for generating an output signal to said means for communicating said multiple levels of alert signals corresponding to said sensor input signal;
(iii) means in said controller for decoding said transmissions and processing said sensor input signals;
and, (iv) means for said controller to engage/disengage valet mode upon a user-activated input, decoding and acting upon a transmission of control signals from said transmitter.

4. A security system for monitoring and controlling access to a protected area and having a capability of switching from stored programming to other operational function programming, comprising:
a) a plurality of sensor input devices located about a protected area, for providing different inputs of security threat corresponding to a threat to said area;
b) means for communicating multiple levels of alert sig-nals, both visual and audible;
c ) a radio frequency receiver and antenna for receiving a digitally encoded transmission, a radio frequency remote control transmitter having means for generating multiple digitally encoded control transmission signals to said, re-ceiver;
d) an electrically programmable and erasable read-only memory; and, e) a controller for controlling the operation of said security system so that said system operates in an armed mode wherein said controller monitors said sensor devices and causes said communicating means to issue said multiple levels of alert signals in response to a sensor activated signal, or in a disarmed mode wherein said system is disabled from communicating said alert signals, said controller comprising:
(i) means for detecting said sensor input signal corresponding to each said threat to said secured area;
(ii) means for generating an output signal to said means for communicating said multiple levels of alert signals corresponding to said sensor input signal;
(iii) means in said controller for decoding said transmissions and processing said sensor input signals;
(iv) means for switching from operational function programming, stored in said electrically programmable and erasable read-only memory and initially preset therein, using a user-activated input, decoding and acting upon receipt of control signals from said transmitter.

5. A security system for monitoring and controlling access to a protected area and having a capability of testing the installation of said security system, comprising:
a) a plurality of sensor input devices located about a protected area, for providing different inputs of security threat corresponding to a threat to said area;
b) means for communicating multiple levels of alert sig-nals, both visual and audible;
c) a radio frequency receiver and antenna for receiving a digitally encoded transmission, a radio frequency remote control transmitter having means for generating multiple digitally encoded control transmission signals to said re-ceiver; and, d) a controller for controlling the operation of said security system so that said system operates in an armed mode wherein said controller monitors said sensor devices and causes said communicating means to issue said multiple levels of alert signals in response to a sensor activated signal, or in a disarmed mode wherein said system is disabled from communicating said alert signals, said controller comprising:
(i) means for detecting said sensor input signal corresponding to each said threat to said secured area;
(ii) means for generating an output signal to said means for communicating said multiple levels of alert signals corresponding to said sensor input signal;
(iii) means in said controller for decoding said transmissions and processing said sensor input signals;
and, (iv) means for using a siren to generate a chirp, audible in and around said protected area, to indicate a change of state of a sensor installation from active to inactive and inactive to active.

6. A security system for monitoring and controlling access to a protected area and having a capability of testing the installation of said security system, comprising:
a) a plurality of sensor input devices located about a protected area, for providing different inputs of security threat corresponding to a threat to said area;
b) means for communicating multiple levels of alert, both visual and audible;
c) a radio frequency receiver and antenna for receiving a digitally encoded transmission, a radio frequency remote control transmitter having means for generating multiple digitally encoded control transmission signals to said re-ceiver; and, d) a controller for controlling the operation of said security system so that said system operates in an armed mode wherein said controller monitors said sensor devices and causes said communicating means to issue said multiple levels of alert signals in response to a sensor activated signal, or in a disarmed mode wherein said system is disabled from communicating said alert signals, said controller comprising:
(i) means for detecting said sensor input signal corresponding to each said threat to said secured area;
(ii) means for generating an output signal to said means for communicating said multiple levels of alert signals corresponding to said sensor input signal;
(iii) means in said controller for decoding said transmissions and processing said sensor input signals;
and, (iv) means for identifying last two inputs tested using a visual indicator.

7. A security system for monitoring and controlling access to a protected area and having a capability of testing the installation of said security system, comprising:
a) a plurality of sensor input devices located about a protected area, for providing different inputs of security threat corresponding to a threat to said area;
b ) means for communicating multiple levels of alert sig-nals, both visual and audible;
c) a radio frequency receiver and antenna for receiving a digitally encoded transmission, a radio frequency remote control transmitter having means for generating multiple digitally encoded control transmission signals to said re-ceiver; and, d) a controller for controlling the operation of said security system so that said system operates in an armed mode wherein said controller monitors said sensor devices and causes said communicating means to issue said multiple levels of alert signals in response to a sensor activated signal, or in a disarmed mode wherein said system is disabled from communicating said alert signals, said controller comprising:
(i) means for detecting said sensor input signal corresponding to each said threat to said secured area;
(ii) means for generating an output signal to said means for communicating said multiple levels of alert signals corresponding to said sensor input signal;
(iii) means in said controller for decoding said transmissions and processing said sensor input signals;
and, (iv) means for testing range of transmissions from said remote transmitter away from and around said pro-tected area in a form of a periodic chirp issued from said means for communicating said multiple levels of alert signals in response to said transmissions received by said radio frequency and decoded by said controller.

8. A security system for monitoring and controlling access to a protected area and having a capability of testing the installation of said security system, comprising:
a) a plurality of sensor input devices located about a protected area, for providing different inputs of security threat corresponding to a threat to said area;
b) means for communicating multiple levels of alert sig-nals, both visual and audible;
c) a radio frequency receiver and antenna for receiving a digitally encoded transmission, a radio frequency remote control transmitter having means for generating multiple digitally encoded control transmission signals to said re-ceiver; and, d) a controller for controlling the operation of said security system so that said system operates in an armed mode wherein said controller monitors said sensor devices and causes said communicating means to issue said multiple levels of alert signals in response to a sensor activated signal, or in a disarmed mode wherein said system is disabled from communicating said alert signals, said controller comprising:
(i) means for detecting said sensor input signal corresponding to each said threat to said secured area;
(ii) means for generating an output signal to said means for communicating said multiple levels of alert signals corresponding to said sensor input signal;
(iii) means in said controller for decoding said transmissions and processing said sensor input signals;
and, (iv) means for using a siren to generate a chirp, audible in and around said protected area, to indicate a change of state of a sensor installation from active to inactive and inactive to active; and, (v) means for using said transmitter to select said sensor input for testing.

9. A security system for monitoring and controlling access to a protected area and having capability in a controller for monitoring and analyzing each sensor input for stability, comprising:
a) a plurality of sensor input devices located about a protected area, for providing different inputs of security threat corresponding to a threat to said area;
b) means for communicating multiple levels of alert sig-nals, both visual and audible;
c) a radio frequency receiver and antenna for receiving a digitally encoded transmission, a radio frequency remote control transmitter having means for generating multiple digitally encoded control transmission signals to said re-ceiver;
d) a radio frequency receiver and antenna for receiving a digitally encoded transmission, a radio frequency remote control transmitter having means for generating multiple digitally encoded control transmission signals to said re-ceiver; and, e) a controller for controlling the operation of said security system so that said system operates in an armed mode wherein said controller monitors said sensor devices and causes said communicating means to issue said multiple levels of alert signals in response to a sensor activated signal, or in a disarmed mode wherein said system is disabled from communicating said alert signals, said controller comprising:
(i) means for detecting said sensor input signal corresponding to each said threat to said secured area;
(ii) means for generating an output signal to said means for communicating said multiple levels of alert signals corresponding to said sensor input signal;
(iii) means in said controller for decoding said transmissions and processing said sensor input signals;
and, (iv) means for bypassing said sensor input found to be unstable for a period of time, and means for continuing to analyze all said inputs, including bypassed inputs, and returning said bypassed input to said security system when later determined to have regained stability.

10. A security system for monitoring and controlling access to a protected area and having capability in a controller for monitoring and analyzing each input for stability, comprising:
a) a plurality of sensor input devices located about a protected area, for providing different inputs of security threat corresponding to a threat to said area;
b) means for communicating multiple levels of alert sig-nals, both visual and audible;
c) a controller for controlling the operation of said security system so that said system operates in an armed mode wherein said controller monitors said sensor devices and causes said communicating means to issue said multiple levels of alert signals in response to a sensor activated signal, or in a disarmed mode wherein said system is disabled from communicating said alert signals, said controller comprising:
(i) means for detecting said sensor input signal corresponding to each said threat to said secured area;
(ii) means for generating an output signal to said means for communicating said multiple levels of alert signals corresponding to said sensor input signal;
(iii) means in said controller for decoding said transmissions and processing said sensor input signals;
(iv) means for bypassing said sensor input found to be unstable for a period of time, and means for con-tinuing to analyze all said inputs, including bypassed inputs, and returning said bypassed input to said secu-rity system when later determined to have regained stability; and, (v) means for counting number of activations from each input that cause said security system to actuate an alarm, over a period of time, in making a determination whether an input has become unstable.

11. A security system for monitoring and controlling access to a protected area and having capability in a controller for monitoring and analyzing each input for stability, comprising:
a) a plurality of sensor input devices located about a protected area, for providing different inputs of security threat corresponding to a threat to said area;
b) means for communicating multiple levels of alert sig-nals both visual and audible;
c) a controller for controlling the operation of said security system so that said system operates in an armed mode wherein said controller monitors said sensor devices and causes said communicating means to issue said multiple levels of alert signals in response to a sensor activated signal, or in a disarmed mode wherein said system is disabled from communicating said alert signals, said controller comprising:
(i) means for detecting said sensor input signal corresponding to each said threat to said secured area;
(ii) means for generating an output signal to said means for communicating said multiple levels of alert signals corresponding to said sensor input signal;
(iii) means in said controller for decoding said transmissions and processing said sensor input signals;
(iv) means for bypassing said sensor input found to be unstable for a period of time, and means for con-tinuing to analyze all said inputs, including bypassed inputs, and returning said bypassed input to said secu-rity system when later determined to have regained stability; and, (v) means in said controller to readmit said unsta-ble input into said security system only after being determined to have regained stability not withstanding said security system undergoing cycling through said arm/disarm/arm modes.

12. A security system for monitoring and controlling access to a protected area and having capability in a controller for monitoring and analyzing each input for stability, comprising:
a) a plurality of sensor input devices located about a protected area, for providing different inputs of security threat corresponding to a threat to said area;
b) means for communicating multiple levels of alert sig-nals, both visual and audible;
c) an electrically programmable and erasable read-only memory; and, d) a controller for controlling the operation of said security system so that said system operates in an armed mode wherein said controller monitors said sensor devices and causes said communicating means to issue said multiple levels of alert signals in response to a sensor activated signal, or in a disarmed mode wherein said system is disabled from communicating said alert signals, said controller comprising:
(i) means for detecting said sensor input signal corresponding to each said threat to said secured area;
(ii) means for generating an output signal to said means for communicating said multiple levels of alert signals corresponding to said sensor input signal;
(iii) means in said controller for decoding said transmissions and processing said sensor input signals;
(iv) means for bypassing for a period of time an input found to be unstable, and means for continuing to analyze all said inputs, including bypassed inputs, and returning said bypassed input to said security system when later determined to have regained stability; and, (v) means for permanently storing system opera-tional parameters in an electrically programmable and erasable read-out memory and for restoring said security, and upon restoration of power, to same state as it had when power was curtailed.

13. A security system for monitoring and controlling access to a protected area and having capability in a controller for reducing volume of alert siren chirps, comprising:
a) a plurality of sensor input devices located about a protected area, for providing different inputs of security threat corresponding to a threat to said area;
b) means for communicating multiple levels of alert sig-nals, both visual and audible, including a siren wherein volume of audible siren alert is generated by a voltage at a siren;
c) a controller for controlling the operation of said security system so that said system operates in an armed mode wherein said controller monitors said sensor devices and causes said communicating means to issue said multiple levels of alert signals in response to a sensor activated signal, or in a disarmed mode wherein said system is disabled from communicating said alert signals, said controller comprising:
(i) means for detecting said sensor input signal corresponding to each said threat to said secured area;
(ii) means for generating an output signal to said means for communicating said multiple levels of alert signals corresponding to said sensor input signal;
(iii) means in said controller for decoding said transmissions and processing said sensor input signals;
and, (iv) means in said controller for reducing said volume of siren chirps by effectively reducing voltage and current at said siren input.

14. A security system for monitoring and controlling access to a protected area and having capability in a controller for reducing volume of alert siren chirps, comprising:
a) a plurality of sensor input devices located about a protected area, for providing different inputs of security threat corresponding to a threat to said area;
b) means for communicating multiple levels of alert sig-nals, both visual and audible, including a siren wherein volume of audible siren alert is generated by a voltage at said siren;
c) a controller for controlling the operation of said security system so that said system operates in an armed mode wherein said controller monitors said sensor devices and causes said communicating means to issue said multiple levels of alert signals in response to a sensor activated signal, or in a disarmed mode wherein said system is disabled from communicating said alert signals, said controller comprising:
(i) means for detecting said sensor input signal corresponding to each said threat to said secured area;
(ii) means for generating an output signal to said means for communicating said multiple levels of alert signals corresponding to said sensor input signal;
(iii) means in said controller for decoding said transmissions and processing said sensor input signals;
and, (iv) means in said controller for reducing said volume of siren chirps by effectively reducing the voltage and current at said siren input, includes other means in said controller for reducing said volume of said siren chirps including means for temporarily changing an immediate audible/visual notification signal to an immediate reduced volume audible/visual notification signal upon receipt of a first control signal transmitted from one channel of said transmitter to said receiver and thereafter receipt of a second control signal transmitted from another channel of said transmitter within a set time period so that said two transmission channels are thereafter available for other programmed functions.

15. A security system for monitoring and controlling access to a protected area and having capability in a controller for reducing volume of alert siren chirps, comprising:
a) a plurality of sensor input devices located about a protected area, for providing different inputs of security threat corresponding to a threat to said area;
b) means for communicating multiple levels of alert sig-nals, both visual and audible, including a siren wherein volume of audible siren alert is generated by a voltage at siren input;
c) a controller for controlling the operation of said security system so that said system operates in an armed mode wherein said controller monitors said sensor devices and causes said communicating means to issue multiple levels of alert signals in response to a sensor activated signal, or in a disarmed mode wherein said system is disabled from communicating said alert signals, said controller comprising:
(i) means for detecting said sensor input signal corresponding to each said threat to the secured area;
(ii) means for generating an output signal to said means for communicating said multiple levels of alert signals corresponding to said sensor input signal;
(iii) means in said controller for decoding said transmissions and processing said sensor input signals;
and, (iv) means in said controller for reducing said volume of siren chirps by effectively reducing the voltage and current at said siren input, including other means in said controller for reducing said volume of said siren chirps by switching from operational function programming, stored in an electrically programmable and erasable read-only memory and initially preset therein, to other operational function programming, using transmissions from said remote transmitter, and including controller inputs, for activation as part of the routine for accessing said means.

16. A security system for monitoring and controlling access to a protected area and having capability in a controller for reducing volume of alert siren chirps, comprising:
a) a plurality of sensor input devices located about a protected area, for providing different inputs of security threat corresponding to a threat to said area;
b) means for communicating multiple levels of alert sig-nals, both visual and audible, including a siren wherein volume of audible siren alert is generated by a voltage at siren input;
c) a controller for controlling the operation of said security system so that said system operates in an armed mode wherein said controller monitors said sensor devices and causes said communicating means to issue said multiple levels of alert signals in response to a sensor activated signal, or in a disarmed mode wherein said system is disabled from commu-nicating said alert signals, said controller comprising:
(i) means for detecting said sensor input signal corresponding to each said threat to the secured area;
(ii) means for generating an output signal to said means for communicating multiple levels of alert signals corresponding to said sensor input signal;
(iii) means in said controller for decoding said transmissions and processing said sensor input signals;
and, (iv) means in said controller for reducing said volume of siren chirps by effectively reducing the voltage and current at siren input by increasing i:he value of a base drive resistor that inputs to said predriver transistor which in turn reduces said base drive current to said siren output drive transistor.

17. A security system for monitoring and controlling access to a protected area and having capability in a controller for reducing volume of alert siren chirps, comprising:
a) a plurality of sensor input devices located about a protected area, for providing different inputs of security threat corresponding to a threat to said area;
b) means for communicating multiple levels of alert sig-nals, both visual and audible, including a siren wherein volume of audible siren alert is generated by a voltage at siren input;
c) a controller for controlling the operation of said security system so that said system operates in an armed mode wherein said controller monitors said sensor devices and causes said communicating means to issue said multiple levels of alert signals in response to a sensor activated signal, or in a disarmed mode wherein said system is disabled from communicating said alert signals, said controller comprising:
(i) means for detecting said sensor input signal corresponding to each said threat to the secured area;
(ii) means for generating an output signal to said means for communicating said multiple levels of alert signals corresponding to said sensor input signal;
(iii) means in said controller for decoding said transmissions and processing said sensor input signals;
and, (iv) means in said controller for reducing said volume of siren chirps by effectively reducing the voltage and current at said siren input by increasing the value of a siren output base drive resistor that in turn reduces base drive current to said siren output drive transistor.

18. A security system for monitoring and controlling access to a protected area and having capability in a controller for reducing volume of alert siren chirps, comprising:
a) a plurality of sensor input devices located about a protected area, for providing different inputs of security threat corresponding to a threat to said area;
b ) means for communicating multiple levels of alert sig-nals, both visual and audible, including a siren wherein volume of audible siren alert is generated by a voltage at siren input;
c) a controller for controlling the operation of said security system so that said system operates in an armed mode wherein said controller monitors said sensor devices and causes said communicating means to issue said multiple levels of alert signals in response to a sensor activated signal, or in a disarmed mode wherein said system is disabled from communicating said alert signals, said controller comprising:
(i) means for detecting said sensor input signal corresponding to each said threat to said secured area;
(ii) means for generating an output signal to said means for communicating said multiple levels of alert signals corresponding to said sensor input signal;
(iii) means in said controller for decoding said transmissions and processing said sensor input signals;
and, (iv) means in said controller for reducing said volume of siren chirps by effectively reducing the voltage and current at said siren input by pulsing said siren input power at a low duty cycle rate.

19. A security system and convenience system for monitoring and controlling access to a vehicle and having multiple levels of alert signal commensurate with a level of security threat to the vehicle, comprising:
a) a plurality of sensor input devices located about the vehicle, including switches, shock sensors or field distur-bance sensors, each for sensing a threatening event and providing a sensor activated input of a level corresponding to a level of security threat to the vehicle;
b) means for communicating multiple levels of alert sig-nals, both visual and audible, commensurate with the level of threat received to said area, including:
(i) a low level alert consisting of a voice warn-away, series of audible chirps or blinking lights;
(ii) a medium level alert consisting of a combina-tion of said voice warnaway, series of said audible chirps and said blinking lights; and, (iii) a high level alert consisting of an immediate full siren alert and said blinking lights, wherein said audible siren alert is generated by a voltage at a siren;
c) means for permanently storing system operational parameters within an electrically programmable and erasable read-only memory; and, d) a controller for using said operational parameters for controlling the operation of said security system so that said system operates in an armed mode wherein said controller monitors said input devices and causes said means for communi-cating to issue said multiple levels of alert signals of a level commensurate with and in response to said sensor activated signal, or in a disarmed mode wherein said system is disabled from communicating said alert signals, said controller comprising:
(i) means for detecting a sensor input signal corresponding to each said level of threat to said s-ecured area;
(ii) means for generating an output signal to said means for communicating said level of alert corresponding to said sensor input signal; and, (iii) means for generating an additional output signal to said means for communicating said level of alert upon receipt of additional input signals from said sensors either at the same or higher threat level or within a set period of time following receipt of first said sensor input signal.

20. A security system and convenience system for monitoring and controlling access to a vehicle and having a capability of selectively deleting audible alert signals following arm/disarm mode change comprising:
a) a plurality of sensor input devices located about a protected area, for providing different inputs of security threat corresponding to a threat to said area;
b) means for communicating multiple levels of alert sig-nals, both visual and audible;
c) a radio frequency receiver and antenna for receiving a digitally encoded transmission, a radio frequency remote control transmitter having means far generating multiple digitally encoded control transmission signals to said re-ceiver; and, d) a controller for controlling the operation of said security system so that said system operates in an armed mode wherein said controller monitors said sensor devices and causes said communicating means to issue said multiple levels of alert signals in response to a sensor activated signal, or in a disarmed mode wherein said system is disabled from communicating said alert signals, said controller comprising:
(i) means for detecting said sensor input signal corresponding to each said threat to said secured area;
(ii) means for generating an output signal to said means for communicating multiple levels of alert signals corresponding to said sensor input signal;
(iii) means in said controller for decoding said transmissions and processing said sensor input signals;
and, (iv) means for selectively changing audible and visual alert signal to an audio free, visual only alert signal upon receipt of a first control signal transmitted from one channel of said transmitter to said receiver and thereafter receipt of a second control signal transmitted from another channel of said transmitter within a set time period so that said two transmission channels are thereafter available for other programmed functions.

21. A security system and convenience system for monitoring and controlling access to a vehicle and having a manual and remote capability of changing the mode of said security system between a security mode and a valet mode, comprising:
a) a plurality of sensor input devices located about a protected area, for providing different inputs of security threat corresponding to a threat to said area;
b) means for communicating multiple levels of alert sig-nals, both visual and audible;
c) a radio frequency receiver and antenna for receiving a digitally encoded transmission, a radio frequency remote control transmitter having means for generating multiple digitally encoded control transmission signals to said re-ceiver; and, d) a controller for controlling the operation of said security system so that said system operates in an armed mode wherein said controller monitors said sensor devices and causes said communicating means to issue said multiple levels of alert signals in response to a sensor activated signal, or in a disarmed mode wherein said system is disabled from communicating said alert signals, said controller comprising:
(i) means for detecting said sensor input signal corresponding to each said threat to said secured area;
(ii) means for generating an output signal to said means for communicating said multiple levels of alert signals corresponding to said sensor input signal;
(iii) means in said controller for decoding said transmissions and processing said sensor input signals;
and, (iv) means for said controller to engage/disengage valet mode upon a user-activated input, decoding and acting upon a transmission of control signals from said transmitter.

22. A security system and convenience system for monitoring and controlling access to a vehicle and having a capability of switching from stored programming to other operational function programming, comprising:
a) a plurality of sensor input devices located about a protected area, for providing different inputs of security threat corresponding to a threat to said area;
b) means for communicating multiple levels of alert sig-nals, both visual and audible;
c) a radio frequency receives and antenna for receiving a digitally encoded transmission, a radio frequency remote control transmitter having means for generating multiple digitally encoded control transmission signals to said re-ceiver; d) a controller for controlling the operation of said security system so that said system oper-ates in an armed mode wherein said controller monitors said sensor devices and causes said commu-nicating means to issue said multiple levels of alert signals in response to a sensor activated signal, or in a disarmed mode wherein said system is disabled from communicating said alert signals, said controller comprising:
(i) means for detecting said sensor input signal corresponding to each said threat to said secured area;
(ii) means for generating an output signal to said means for communicating said multiple levels of alert signals corresponding to said sensor input signal;
(iii) means in said controller for decoding said transmissions and processing said sensor input signals;
(iv) means for switching from operational function programming, stored in an electrically programmable and erasable read-only memory and initially preset therein, to other operational function programming, using a user-activated input, decoding and acting upon receipt of control signals from said transmitter.

23. A security system and convenience system for monitoring and controlling access to a vehicle and having a capability of testing the installation of said security system, comprising:
a) a plurality of sensor input devices located about a protected area, for providing different inputs of security threat corresponding to a threat to said area;
b) means for communicating multiple levels of alert sig-nals, both visual and audible;
c) a radio frequency receiver and antenna for receiving a digitally encoded transmission, a radio frequency remote control transmitter having means for generating multiple digitally encoded control transmission signals to said re-ceiver; and, d) a controller for controlling the operation of said security system so that said system operates in an armed mode wherein said controller monitors said sensor devices and causes said communicating means to issue said multiple levels of alert signals in response to a sensor activated signal, or in a disarmed mode wherein said system is disabled from communicating said alert signals, said controller comprising:
(i) means for detecting said sensor input signal corresponding to each said threat to said secured area;
(ii) means for generating an output signal to said means for communicating said multiple levels of alert signals corresponding to said sensor input signal;
(iii) means in said controller for decoding said transmissions and processing said sensor input signals;

and, (iv) means for using a siren to generate a chirp, audible in and around the protected area, to indicate the change of state of a sensor installation from active to inactive and inactive to active.

24. A security system and convenience system for monitoring and controlling access to a vehicle and having a capability of testing the installation of said security system, comprising:
a) a plurality of sensor input devices located about a protected area, for providing different inputs of security threat corresponding to a threat to said area;
b) means for communicating multiple levels of alert sig-nals, both visual and audible;
c) a radio frequency receiver and antenna for receiving a digitally encoded transmission, a radio frequency remote control transmitter having means for generating multiple digitally encoded control transmission signals to said re-ceiver; and, d) a controller for controlling the operation of said security system so that said system operates in an armed mode wherein said controller monitors said sensor devices and causes said communicating means to issue said multiple levels of alert signals in response to a sensor activated signal, or in a disarmed mode wherein said system is disabled from communicating said alert signals, said controller comprising:
(i) means for detecting said sensor input signal corresponding to each said threat to said secured area;
(ii) means for generating an output signal to said means for communicating said variable alert signal corresponding to said sensor input signal;
(iii) means in said controller for decoding said transmissions and processing said sensor input signals;
and, (iv) means for identifying the last two inputs tested using a visual indicator.

25. A security system and convenience system for monitoring and controlling access to a vehicle and having a capability of testing the installation of said security system, comprising:
a) a plurality of sensor input devices located about a protected area, for providing different inputs of security threat corresponding to a threat to said area;
b) means for communicating multiple levels of alert sig-nals, both visual and audible;
c) a radio frequency receiver and antenna for receiving a digitally encoded transmission, a radio frequency remote control transmitter having means for generating multiple digitally encoded control transmission signals to said re-ceiver; and, d) a controller for controlling the operation of said security system so that said system operates in an armed mode wherein said controller monitors said sensor devices and causes said communicating means to issue said multiple levels of alert signals in response to a sensor activated signal, or in a disarmed mode wherein said system is disabled from communicating said multiple levels of alert signals, said controller comprising:
(i) means for detecting said sensor input signal corresponding to each said threat to said secured area;
(ii) means for generating an output signal to said means for communicating said multiple levels of alert signals corresponding to said sensor input signal;
(iii) means in said controller for decoding said transmissions and processing said sensor input signals;
and, (iv) means for testing the range of transmissions from said remote transmitter away from and around the protected area in the form of a periodic chirp issued from said means for communicating said alert signal in response to said transmissions received by said radio frequency and decoded by said controller.

26. A security system and convenience system for monitoring and controlling access to a vehicle and having a capability of testing the installation of said security system, comprising:
a) a plurality of sensor input devices located about a protected area, for providing different inputs of security threat corresponding to a threat to said area;
b) means for communicating multiple levels of alert sig-nals, both visual and audible;
c) a radio frequency receiver and antenna for receiving a digitally encoded transmission, a radio frequency remote control transmitter having means for generating multiple digitally encoded control transmission signals to said re-ceiver; d) a controller for controlling the operation of said security system so that said system oper-ates in an armed mode wherein said controller monitors said sensor devices and causes said commu-nicating means to issue said multiple levels of alert signals in response to a sensor activated signal, or in a disarmed mode wherein said system is disabled from communicating said alert signals, said controller comprising:
(i) means for detecting said sensor input signal corresponding to each said threat to said secured area;
(ii) means for generating an output signal to said means for communicating said multiple levels of alert signals corresponding to said sensor input signal;
(iii) means in said controller for decoding said transmissions and processing said sensor input signals;
(iv) means for using a siren to generate a chirp, audible in and around the protected area, to indicate the change of state of a sensor installation from active to inactive and inactive to active; and, (v) means for using said transmitter to select said sensor input for testing.

27. A security system and convenience system for monitoring and controlling access to a vehicle and having capability in a controller for monitoring and analyzing each input for stability, comprising:
a) a plurality of sensor input devices located about a protected area, for providing different inputs of security threat corresponding to a threat to said area;
b) means for communicating multiple levels of alert sig-nals, both visual and audible;
c) a radio frequency receiver and antenna for receiving a digitally encoded transmission, a radio frequency remote control transmitter having means for generating multiple digitally encoded control transmission signals to said re-ceiver;
d) a radio frequency receiver and antenna for receiving a digitally encoded transmission, a radio frequency remote control transmitter having means for generating multiple digitally encoded control transmission signals to said re-ceiver; and, e) a controller for controlling the operation of said security system so that said system operates in an armed mode wherein said controller monitors said sensor devices and causes said communicating means to issue said multiple levels of alert signals in response to a sensor activated signal, or in a disarmed mode wherein said system is disabled from communicating said alert signals, said controller comprising:
(i) means for detecting said sensor input signal corresponding to each said threat to said secured area;
(ii) means for generating an output signal to said means for communicating said multiple levels of alert signals corresponding to said sensor input signal;
(iii) means in said controller for decoding said transmissions and processing said sensor input signals;
and, (iv) means for bypassing said sensor input found to be unstable for a period of time, and means for continuing to analyze all said inputs, including bypassed inputs, and returning said bypassed input to said security system when later determined to have regained stability.

28. A security system and convenience system for monitoring and analyzing each input for stability, comprising:
a) a plurality of sensor input devices located about a protected area, for providing different inputs of security threat corresponding to a threat to said area;
b) means for communicating multiple levels of alert sig-nals, both visual and audible;
c) a controller for controlling the operation of said security system so that said system operates in an armed mode wherein said controller monitors said sensor devices and causes said communicating means to issue said multiple levels of alert signals in response to a sensor activated signal, or in a disarmed mode wherein said system is disabled from commu-nicating said alert signals, said controller comprising:
(i) means for detecting said sensor input signal corresponding to each said threat to said secured area;
(ii) means for generating an output signal to said means for communicating said multiple levels of alert signals corresponding to said sensor input signal;
(iii) means in said controller for decoding said transmissions and processing said sensor input signals;
(iv) means for bypassing said sensor input found to be unstable for a period of time, and means for con-tinuing to analyze all said inputs, including bypassed inputs, and returning said inputs, including bypassed in puts, and returning said bypassed input to said security system when later determined to regained stability; and, (v) means for counting the number of activations from each input that cause the security system to actuate an alarm, over a period of time, in making a determination whether an input has become unstable.

29. A security system and convenience system for monitoring and controlling access to a vehicle and having capability in a con-troller for monitoring and analyzing each input for stability, comprising:
a) a plurality of sensor input devices located about a protected area, for providing different inputs of security threat corresponding to a threat to said area;
b) means for communicating multiple levels of alert sig-nals both visual and audible;
c) a controller for controlling the operation of said security system so that said system operates in an armed mode wherein said controller monitors said sensor devices and causes said communicating means to issue said multiple levels of alert signals in response to a sensor activated signal, or in a disarmed mode wherein said system is disabled from communicating said alert signals, said controller comprising:
(i) means for detecting said sensor input signal corresponding to each said threat to said secured area;
(ii) means for generating an output signal to said means for communicating said multiple levels of alert signals corresponding to said sensor input signal;
(iii) means in said controller for decoding said transmissions and processing said sensor input signals;
(iv) means for bypassing said sensor input found to be unstable for a period of time, and means for continuing to analyze all said inputs, including bypassed inputs, and returning said bypassed input to said security system when later determined to have regained stability; and, (v) means in said controller to readmit said unsta-ble input into said security system only after being determined to have regained stability notwithstanding said security system undergoing cycling through said arm/disarm/arm modes.

30. A security system and convenience system for monitoring and controlling access to a vehicle and having a capability in restoring said security system upon restoration of power following a power failure, comprising:
a) a plurality of sensor input devices located about a protected area, for providing different inputs of security threat corresponding to a threat to said area;
b) means for communicating multiple levels of alert sig-nals, both visual and audible;
c) an electrically programmable and erasable read-only memory; and, d) a controller for controlling the operation of said security system so that said system operates in an armed mode wherein said controller monitors said sensor devices and causes said communicating means to issue said multiple levels of alert signals in response to a sensor activated signal, or in a disarmed mode wherein said system is disabled from communicating said alert signals, said controller comprising:
(i) means for detecting said sensor input signal corresponding to each said threat to said secured area;
(ii) means for generating an output signal to said means for communicating said multiple levels of alert signals corresponding to said sensor input signal;
(iii) means in said controller for decoding said transmissions and processing said sensor input signals;
(iv) means for bypassing for a period of time and an input found to be unstable, and means for continuing to analyze all said inputs, including bypassed inputs, and returning said bypassed input to said security system when later determined to have regained stability; and, (v) means for permanently storing system opera-tional parameters in an electrically programmable and erasable read-only memory and for restoring said secu-rity, and upon restoration of power, to the same state as it had when power was curtailed.

31. A security system and convenience system for monitoring and controlling access to a vehicle and having capability in a controller for reducing volume of alert siren chirps, comprising:
a) a plurality of sensor input devices located about a protected area, for providing different inputs of security threat corresponding to a threat to said area;
b) means for communicating multiple levels of alert sig-nals, both visual and audible, including a siren wherein volume of audible siren alert is generated by a voltage at a siren;
c) a controller for controlling the operation of said security system so that said system operates in an armed mode wherein said controller monitors said sensor devices and causes said communicating means to issue said multiple levels of alert signals in response to a sensor activated signal, or in a disarmed mode wherein said system is disabled from communicating said alert signals, said controller comprising:
(i) means for detecting said sensor input signal corresponding to each said threat to said secured area;
(ii) means for generating an output signal to said means for communicating said multiple levels of alert signals corresponding to said sensor input signal;
(iii) means in said controller for decoding said transmissions and processing said sensor input signals;
and, (iv) means in said controller for reducing said volume of siren chirps by effectively reducing the voltage and current at said siren input.

32. A security system and convenience system for monitoring and controlling access to a vehicle and having capability in a controller for reducing volume of alert siren chirps, comprising:
a) a plurality of sensor input devices located about a protected area, for providing different inputs of security threat corresponding to a threat to said area;
b) means for communicating multiple levels of alert sig-nals, both visual and audible, including a siren wherein volume of audible siren alert is generated by a voltage at said siren;
c) a controller for controlling the operation of said security system so that said system operates in an armed mode wherein said controller monitors said sensor devices and causes said communicating means to issue said multiple levels of alert signals in response to a sensor activated signal, or in a disarmed mode wherein said system is disabled from communicating said alert signals, said controller comprising:
(i) means for detecting said sensor input signal corresponding to each said threat to said secured area;
(ii) means for generating an output signal to said means for communicating said multiple levels of alert signals corresponding to said sensor input signal;
(iii) means in said controller for decoding said transmissions and processing said sensor input signals;
and, (iv) means in said controller for reducing said volume of siren chirps by effectively reducing the voltage and current at said siren input, includes other means in said controller for reducing said volume of said siren chirps including means for temporarily changing an immediate audible/visual notification signal to an immediate reduced volume audible/visual notification signal upon receipt of a first control signal transmitted from one channel of said transmitter to said receiver and thereafter receipt of a second control signal transmitted from another channel of said transmitter within a set time period so that said two transmission channels are thereafter available for other programmed functions.

33. A security system and convenience system for monitoring and controlling access to a vehicle and having capability in a controller for reducing volume of alert siren chirps, comprising:
a) a plurality of sensor input devices located about a protected area, for providing different inputs of security threat corresponding to a threat to said area;
b) means for communicating multiple levels of alert sig-nals, both visual and audible, including a siren wherein volume of audible siren alert is generated by a voltage at siren input;
c) a controller for controlling the operation of said security system so that said system operates in an armed mode wherein said controller monitors said sensor devices and causes said communicating means to issue said multiple levels of alert signals in response to a sensor activated signal, or in a disarmed mode wherein said system is disabled from communicating said alert signals, said controller comprising:
(i) means for detecting said sensor input signal corresponding to each said threat to said secured area;
(ii) means for generating an output signal to said means for communicating said multiple levels of alert signals corresponding to said sensor input signal;
(iii) means in said controller for decoding said transmissions and processing said sensor input signals;
and, (iv) means in said controller for reducing said volume of siren chirps by effectively reducing the voltage and current at said siren input, including other means in said controller for reducing said volume of said siren chirps by switching from operational function programming, stored in an electrically programmable and erasable read-only memory and initially preset therein, to other operational function programmable and erasable read-only memory and initially preset therein, to other operational function programming, using transmissions from said remote transmitter, and including controller inputs, for activation as part of the routine for ac-cessing said means.

34. A security system and convenience system for monitoring and controlling access to a vehicle and having capability in a controller for reducing volume of alert siren chirps, comprising:
a) a plurality of sensor input devices located about a protected area, for providing different inputs of security threat corresponding to a threat to said area;
b) means for communicating multiple levels of alert sig-nals, both visual and audible, including a siren wherein volume of audible siren alert is generated by a voltage at siren input;
c) a controller for controlling the operation of said security system so that said system operates in an armed mode wherein said controller monitors said sensor devices and causes said communicating means to issue said multiple levels of alert signals in response to a sensor activated signal, or in a disarmed mode wherein said system is disabled from communicating said alert signals, said controller comprising:
(i) means for detecting said sensor input signal corresponding to each said threat to said secured area;
(ii) means for generating an output signal to said means for communicating said multiple levels of alert signals corresponding to said sensor input signal;
(iii) means in said controller for decoding said transmissions and processing said sensor input signals;
and, (iv) means in said controller for reducing said volume of siren chirps by effectively reducing the voltage and current at siren input by increasing the value of a base drive resistor that inputs to said predriver transistor which in turn reduces said base drive current to said siren output drive transistor.

35. A security system and convenience system for monitoring and controlling access to a vehicle and having capability in a controller for reducing volume of alert siren chirps, comprising:
a) a plurality of sensor input devices located about a protected area, for providing different inputs of security threat corresponding to a threat to said area;
b) means for communicating multiple levels of alert signals, both visual and audible, including a siren wherein volume of audible siren alert is generated by a voltage at siren input;
c) a controller for controlling the operation of said security system so that said system operates in an armed mode wherein said controller monitors said sensor devices and causes said communicating means to issue said multiple levels of alert signals in response to a sensor activated signal, or in a disarmed mode wherein said system is disabled from communicating said alert signals, said controller comprising:
(i) means for detecting said sensor input signal corresponding to each said threat to said secured area;
(ii) means for generating an output signal to said means for communicating said multiple levels of alert signals, corresponding to said sensor input signal;
(iii) means in said controller for decoding said transmissions and processing said sensor input signals;
and, (iv) means in said controller for reducing said volume of siren chirps by effectively reducing the voltage and current at said siren input by increasing the value of a siren output base drive resistor that in turn reduces base drive current to said siren output drive transistor.

36. A security system and convenience system for monitoring and controlling access to a vehicle and having capability in a controller for reducing volume of alert siren chirps, comprising:
a) a plurality of sensor input devices located about a protected area, for providing different inputs of security threat corresponding to a threat to said area;
b) means for communicating multiple levels of alert signals, both visual and audible, including a siren wherein [the] volume of audible siren alert is generated by a voltage at siren input;
c) a controller for controlling the operation of said security system so that said system operates in an armed mode wherein said controller monitors said sensor devices and causes said communicating means to issue said multiple levels of alert signals in response to a sensor activated signal, or in a disarmed mode wherein said system is disabled from commu-nicating said alert signals, said controller comprising:
(i) means for detecting said sensor input signal corresponding to each said threat to said secured area;
(ii) means for generating an output signal to said means for communicating said multiple levels of alert signals corresponding to said sensor input signal;
(iii) means in said controller for decoding said transmissions and processing said sensor input signals;
and, (iv) means in said controller for reducing said volume of siren chirps by effectively reducing the voltage and current at siren input by pulsing siren input power at a low duty cycle rate.

37. A security system and convenience system for monitoring and controlling access to a vehicle and having a capability of providing a remote engine start signal, comprising:
a) a plurality of sensor input devices located about a protected area, for providing different inputs of security threat corresponding to a threat to said area;
b) means for communicating multiple levels of alert signals, both visual and audible;
c) a radio frequency receiver and antenna for receiving a digitally encoded transmission, a radio frequency remote control transmitter having means for generating multiple digitally encoded control transmission signals to said re-ceiver; and, d) a controller for controlling the operation of said security system so that said system operates in an armed mode wherein said controller monitors said sensor devices and causes said communicating means to issue said multiple levels of alert signals in response to a sensor activated signal, or in a disarmed mode wherein said system is disabled from communicating said alert signals, said controller comprising:
(i) means for detecting said sensor input signal corresponding to each said threat to said secured area;
(ii) means for generating an output signal to said means for communicating said multiple levels of alert signals corresponding to said sensor input signal;
(iii) means in said controller for decoding said transmissions and processing said sensor input signals;
and, (iv) means for providing a signal to remote start the internal combustion engine of the vehicle while maintaining maximum security thereover.

38. A security system and convenience system for monitoring and controlling access to a vehicle and having a capability of providing a remote engine start signal, comprising:
a) a plurality of sensor input devices located about a protected area, for providing different inputs of security threat corresponding to a threat to said area;
b) means for communicating multiple levels of alert signals, both visual and audible;

c) a radio frequency receiver and antenna for receiving a digitally encoded transmission, a radio frequency remote control transmitter having means for generating multiple digitally encoded control transmission signals to said re-ceiver; and, d) a controller for controlling the operation of said security system so that said system operates in an armed mode wherein said controller monitors said sensor devices and causes said communicating means to issue said multiple levels of alert signals in response to a sensor activated signal, or in a disarmed mode wherein said system is disabled from communicating said alert signals, said controller comprising:
(i) means for detecting said sensor input signal corresponding to each said threat to said secured area;
(ii) means for generating an output signal to said means for communicating said multiple levels of alert signals corresponding to said sensor input signal;
(iii) means in said controller for decoding said transmissions and processing said sensor input signals;
and, (iv) means in said controller, for receipt of a transmission from said remote transmitter, activates a vehicle starting routine that checks the arm/disarm status of the vehicle security system, bypasses the lowest threat level inputs if the system is in the armed mode, locks the vehicle access doors if the system is in the disarm mode, and then outputs a signal to remote start the engine.

39. A security system and convenience system for monitoring and controlling access to a vehicle and having a capability of controlling the lighting systems in the vehicle, comprising:
a) a plurality of sensor input devices located about a protected area, for providing different inputs of security threat corresponding to a threat to said area;

b) means for communicating multiple levels of alert signals, both visual and audible, including a siren wherein [the] volume of audible siren alert is generated by a voltage at [the] siren input;
c) a controller for controlling the operation of said security system so that said system operates in an armed mode wherein said controller monitors said sensor devices and causes said communicating means to issue said multiple levels of alert signals in response to a sensor activated signal, or in a disarmed mode wherein said system is disabled from communicating said alert signals, said controller comprising:
(i) means for detecting said sensor input signal corresponding to each said threat to said secured area;
(ii) means for generating an output signal to said means for communicating said multiple levels of alert signals corresponding to said sensor input signal;
(iii) means in said controller for decoding said transmissions and processing said sensor input signals;
and, (iv) means for detecting the level of ambient light and controlling the lighting systems in the vehicle independent of the user.

40. A security system and convenience system for monitoring and controlling access to a vehicle and having a capability of controlling the lighting systems in the vehicle, comprising:
a) a plurality of sensor input devices located about a protected area, for providing different inputs of security threat corresponding to a threat to said area;
b) means for communicating multiple levels of alert signals, both visual and audible, including a siren wherein volume of audible siren alert is generated by a voltage at siren input;
c) a controller for controlling the operation of said security system so that said system operates in an armed mode wherein said controller monitors said sensor devices and causes said communicating means to issue said multiple levels of alert signals in response to a sensor activated signal, or in a disarmed mode wherein said system is disabled from commu-nicating said alert signals, said controller comprising:
(i) means for detecting said sensor input signal corresponding to each said threat to said secured area;
(ii) means for generating an output signal to said means for communicating multiple levels of alert signals corresponding to raid sensor input signal;
(iii) means in said controller for decoding said transmissions and processing said sensor input signals;
and, (iv) means for detecting the operation of a wind-shield wiper system and activating the lighting systems of the vehicle when said wiper system is functioning.

41. A security system and convenience system for monitoring acid controlling access to a vehicle and having a capability of controlling the lighting systems in the vehicle, comprising:
a) a plurality of sensor input devices located about a protected area, for providing different inputs of security threat corresponding to a threat to said area;
b) means for communicating multiple levels of alert signals, both visual and audible, including a siren wherein volume of audible siren alert is generated by a voltage at siren input;
c) a controller for controlling the operation of said security system so that said system operates in an armed mode wherein said controller monitors said sensor devices and causes said communicating means to issue said multiple levels of alert signals, in response to a sensor activated signal, or in a disarmed mode wherein said system is disabled from communicating said alert signals, said controller comprising:

(i) means for detecting said sensor input signal corresponding to each said threat to said secured area;
(ii) means for generating an output signal to said means for communicating said multiple levels of alert signals corresponding to said sensor input signal;
(iii) means in said controller for decoding said transmissions and processing said sensor input signals;
and, (iv) means in said controller to control the light-ing systems of the vehicle when said security system is passing from the armed mode to the disarmed mode, the disarmed mode to the armed mode, during the armed mode, and while the vehicle is in use.

42. A security system and convenience system for monitoring and controlling access to a vehicle and having a capability of controlling the lighting systems in the vehicle, comprising:
a) a plurality of sensor input devices located about a protected area, for providing different inputs of security threat corresponding to a threat to said area;
b) means for communicating multiple levels of alert signals, both visual and audible, including a siren wherein volume of audible siren alert is generated by a voltage at siren input;
c) a controller for controlling the operation of said security system so that said system operates in an armed mode wherein said controller monitors said sensor devices and causes said communicating means to issue multiple levels of alert signals in response to a sensor activated signal, or in a disarmed mode wherein said system is disabled from commu-nicating said alert signals, said controller comprising:
(i) means for detecting said sensor input signal corresponding to each said threat to said secured area;
(ii) means for generating an output signal to said means for communicating said multiple levels of alert signals corresponding to said sensor input signal;
(iii) means in said controller for decoding said transmissions and processing said sensor input signals;
and, (iv) means in said controller to provide external vehicle lighting when the ignition is turned off for a given period of time under low light conditions.

43. A security system and convenience system for monitoring and controlling access to a vehicle and having a capability of controlling the lighting systems in the vehicle, comprising:
a) a plurality of sensor input devices located about a protected area, for providing different inputs of security threat corresponding to a threat to said area;
b) means for communicating multiple levels of alert signals, both visual and audible, including a siren wherein volume of audible siren alert is generated by a voltage at siren input;
c) a controller for controlling the operation of said security system so that said system operates in an armed mode wherein said controller monitors said sensor devices and causes said communicating means to issue said multiple levels of alert signals in response to a sensor activated signal, or in a disarmed mode wherein said system is disabled from communicating said alert signals, said controller comprising:
(i) means for detecting said sensor input signal corresponding to each said threat to said secured area;
(ii) means for generating an output signal to said means for communicating said multiple levels of alert signals corresponding to said sensor input signal;
(iii) means in said controller for decoding said transmissions and processing said sensor input signals;
and, (iv) means in said controller for providing ex-ternal and internal vehicle lighting when the security system is disarmed under low light conditions.

44. A security system for monitoring and controlling access to a protected area and having multiple levels of alert signal commensurate with a level of security threat to said area, comprising:
a) a plurality of sensor input devices located about a protected area, for providing different input levels of security threat corresponding to the level of threat to said area;
b) means for communicating multiple levels of alert signals, both visual and audible, progressively including:
(i) a low level alert consisting of a voice warn-away, series of audible chirps or blinking lights;
(ii) a medium level alert consisting of a combina-tion of said voice warnaway, series of said audible chirps and said blinking lights; and, (iii) a high level alert consisting of an immediate full siren alert and said blinking lights, wherein said audible siren alert is generated by a voltage at a siren;
c) a radio frequency receiver and antenna for receiving a digitally encoded transmission, a radio frequency remote control transmitter having means for generating multiple digitally encoded control transmission signals to said re-ceiver; d) means for permanently storing system operational parameters within an electrically programmable and erasable read-only memory; and, e) a controller for using-said operational parameters for controlling the operation of said security system so that said system operates in an armed mode wherein said controller monitors said input devices and causes said means for communi-cating to issue said multiple levels of alert signals of a level commensurate with and in response to said sensor acti-vated signal, or in a disarmed mode wherein said system is disabled from communicating said alert signals, said con-troller comprising:
(i) means for detecting a sensor input signal corresponding to each said level of threat to said s-ecured area;
(ii) means for generating an output signal to said means for communicating said level of alert corresponding to said sensor input signal; and, (iii) means in said controller for decoding said transmissions and processing said sensor input signals;
and, (iv) means for generating an additional output signal to said means for communicating said multiple levels of alert signals upon receipt of additional input signals from said sensors either at the same or higher threat level or within a set period of time following receipt of said first sensor input signal.

45. A security system and convenience system for monitoring and controlling access to a vehicle and having multiple levels of alert signal commensurate with a level of security threat to the vehicle, comprising:
a) a plurality of sensor input devices located about the vehicle, including switches, shock sensors and field distur-bance sensors, each for sensing a threatening event and providing a sensor activated input of a level corresponding to the level of threat to the vehicle;
b) means for communicating multiple levels of alert signals, both visual and audible, commensurate with the level of threat received to said area, including:
(i) a low level alert consisting of a voice warn-away, series of audible chirps or blinking lights;
( ii ) a medium level alert consisting of a combina-tion of said voice warnaway, series of said audible chirps and said blinking lights; and, (iii) a high level alert consisting of an immediate full siren alert and said blinking lights, wherein said audible siren alert is generated by a voltage at a siren;
c) a radio frequency receiver and antenna for receiving a digitally encoded transmission, a radio frequency remote control transmitter having means for generating multiple digitally encoded control transmission signals to said re-ceiver; d) means for permanently storing system operational parameters within an electrically programmable and erasable read-only memory; and, e) a controller for using said operational parameters for controlling the operation of said security system so that said system operates in an armed mode wherein said controller monitors said input devices and causes said means for communi-cating to issue said multiple levels of alert signals of a level commensurate with and in response to said sensor acti-vated signal, or in a disarmed mode wherein said system is disabled from communicating said alert signals, said controller comprising:
(i) means for detecting a sensor input signal corresponding to each said level of threat to said s-ecured area;
(ii) means for generating an output signal to said means for communicating said multiple levels of alert signals corresponding to said sensor input signal; and, (iii) means in said controller for decoding said transmissions and processing said sensor input signals;
and, (iv) means for generating an additional output signal to said means for communicating said level of alert upon receipt of additional input signals from said sensors either at the same or higher threat level or within a set period of time following receipt of said first sensor input signal.

46. A security system for monitoring and controlling access to a protected area and having a capability of testing the installation of said security system, comprising:
a ) a plurality of sensor input devices located about a protected area, for providing different inputs of security threat corresponding to a threat to said area;
b) means for communicating multiple levels of alert signals both visual and audible;
c) a radio frequency receiver and antenna for receiving a digitally encoded transmission, a radio frequency remote control transmitter having means for generating multiple digitally encoded control transmission signals to said re-ceiver; and, d) a controller for controlling the operation of said security system so that said system operates in an armed mode wherein said controller monitors said sensor devices and causes said communicating means to issue said multiple levels of alert signals in response to a sensor activated signal, or in a disarmed mode wherein said system is disabled from commu-nicating said alert signals, said controller comprising:
(i) means for detecting said sensor input signal corresponding to each said threat to said secured area;
(ii) means for generating an output signal to said means for communicating said multiple levels of alert signals corresponding to said sensor input signal;
(iii) means in said controller for decoding said transmissions and processing said sensor input signals;
(iv) means for using a siren to generate a chirp, audible in and around the protected area, to indicate the change of state of a sensor installation from active to inactive and inactive to active; and, (v) means for identifying the last two inputs tested using a visual indicator.

47. A security system and convenience system for monitoring and controlling access to a vehicle and having a capability of testing the installation of said security system, comprising:
a) a plurality of sensor input devices located about a protected area, for providing different inputs of security threat corresponding to a threat to said area;
b) means for communicating multiple levels of alert signals both visual and audible;
c) a radio frequency receiver and antenna for receiving a digitally encoded transmission, a radio frequency remote control transmitter having means for generating multiple digitally encoded control transmission signals to said re-ceiver; and, d) a controller for controlling the operation of said security system so that said system operates in an armed mode wherein said controller monitors said sensor devices and causes said communicating means to issue said multiple levels of alert signals in response to a sensor activated signal, or in a disarmed mode wherein said system is disabled from commu-nicating said alert signals, said controller comprising:
(i) means for detecting said sensor input signal corresponding to each said threat to said secured area;
(ii) means for generating an output signal to said means for communicating said multiple levels of alert signals corresponding to said sensor input signal;
(iii) means in said controller for decoding said transmissions and processing said sensor input signals;
(iv) means for using a siren to generate a chirp, audible in and around the protected area, to indicate the change of state of a sensor installation from active to inactive and inactive to active; and, (v) means for identifying the last two inputs tested using a visual indicator.

48. A security system for monitoring and controlling access to a protected area and having a manual and remote capability of changing the mode of said security system between a security mode and a valet mode, comprising:
a) a plurality of sensor input devices located about a protected area, for providing different inputs of security threat corresponding to a threat to said area;
b) means for communicating multiple levels of alert signals, both visual and audible;
c) a radio frequency receiver and antenna for receiving a digitally encoded transmission, a radio frequency remote control transmitter having means for generating multiple digitally encoded control transmission signals to said re-ceiver;
d ) a valet mode selectively disengaging a user defined subgroup of said input sensors; and, e) a controller for controlling the operation of said security system so that said system operates in an armed mode wherein said controller monitors said sensor devices and causes said communicating means to issue said multiple levels of alert signals in response to a sensor activated signal, or in a disarmed mode wherein said system is disabled from commu-nicating said alert signals, said controller comprising:
(i) means for detecting said sensor input signal corresponding to each said threat to said secured area;
(ii) means for generating an output signal to said means for communicating said multiple levels of alert signals corresponding to said sensor input signal;
(iii) means in said controller for decoding said transmissions and processing said sensor input signals;
and, (iv) means for said controller to engage/disengage said valet mode upon a user-activated input, decoding and acting upon a transmission of control signals from said transmitter.

49. A security system and convenience system for monitoring and controlling access to a vehicle and having a manual and remote capability of changing the mode of said security system between a security mode and a valet mode, comprising:
a) a plurality of sensor input devices located about a protected area, for providing different inputs of security threat corresponding to a threat to said area;
b) means for communicating multiple levels of alert signals, both visual and audible;
c) a radio frequency receiver and antenna for receiving a digitally encoded transmission, a radio frequency remote control transmitter having means for generating multiple digitally encoded control transmission signals to said re-ceiver;
d) a valet mode selectively disengaging a user defined subgroup of said input sensors; and, e) a controller for controlling the operation of said security system so that said system operates in an armed mode wherein said controller monitors said sensor devices and causes said communicating means to issue said multiple levels of alert signals in response to a sensor activated signal, or in a disarmed mode wherein said system is disabled from commu-nicating said alert signals, said controller comprising:
(i) means for detecting said sensor input signal corresponding to each said threat to said secured area;
(ii) means for generating an output signal to said means for communicating said multiple levels of alert signals corresponding to said sensor input signal;
(iii) means in said controller for decoding said transmissions and processing said sensor input signals;
and, (iv) means for said controller to engage/disengage said valet mode upon a user-activated input, decoding and acting upon a transmission of control signals from said transmitter.

50. A security system for monitoring and controlling access to a protected area and having a capability in said controller for reducing volume of alert siren chirps, comprising:
a) a plurality of sensor input devices located about a protected area, for providing different inputs of security threat corresponding to a threat to said area;
b) means for communicating multiple levels of alert signals, both visual and audible, including a siren wherein volume of audible siren alert is generated by a voltage at said siren;
c) a controller for controlling operation of said security system so that said system may be operated in an armed mode wherein said controller monitors said sensor devices and causes said communicating means to issue multiple levels of alert signals in response to a sensor activated signal, or in a disarmed mode wherein said system is disabled from communicating said alert signals, said controller comprising:
(i) means for detecting a sensor input signal corresponding to each said threat to said secured area;
(ii) means for generating an output signal to said means for communicating said multiple levels of alert signals corresponding to said sensor input signal;
(iii) means in said controller for decoding said transmissions and processing said sensor input signals;
and, (iv) means in said controller for reducing said volume of siren chirps by effectively reducing the voltage and current at the siren output by using a separate predriver transistor, which is driven by a separate chirp signal independent of the extended siren output, for generating the chirp base drive to the siren output drive transistor.

51. A security system and convenience system for monitoring and controlling access to a vehicle and having a capability in said controller for reducing volume of the alert siren chirps, comprising:
a) a plurality of sensor input devices located about a protected area, for providing different inputs of security threat corresponding to a threat to said area;
b ) means for communicating multiple levels of alert signals, both visual and audible, including a siren wherein volume of audible siren alert is generated by a voltage at said siren;
c) a controller for controlling the operation of said security system so that said system may be operated in an armed mode wherein said controller monitors said sensor devices and causes said communicating means to issue said multiple levels of alert signals in response to a sensor activated signal, or in a disarmed mode wherein said system is disabled from communicating alert signals, said controller comprising:
(i) means for detecting a sensor input signal corresponding to each said threat to said secured area;
(ii) means for generating an output signal to said means for communicating said multiple levels of alert signals corresponding to said sensor input signal;
(iii) means in said controller for decoding said transmissions and processing said sensor input signals;
and, (iv) means in said controller for reducing the volume of siren chirps by effectively reducing the voltage and current at the siren output by using a separate predriver transistor, which is driven by a separate chirp signal independent of the extended siren output, for generating the chirp base drive to the siren output drive transistor.