CN2283952Y - Signal regulating device - Google Patents
Signal regulating device Download PDFInfo
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- CN2283952Y CN2283952Y CN 96241957 CN96241957U CN2283952Y CN 2283952 Y CN2283952 Y CN 2283952Y CN 96241957 CN96241957 CN 96241957 CN 96241957 U CN96241957 U CN 96241957U CN 2283952 Y CN2283952 Y CN 2283952Y
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Abstract
The utility model relates to a signal regulating and changing device offered for combined with the upper part of a coaxial cable of a cable television so as to make a monitoring system combined with the cable television station system by means of the device. The monitoring system and the cable television station system can share a power supply and a television receiver of the cable television. The signal regulating and changing device comprises a modulation device for processing the image/voice of the television signal, a gain amplifier, a plurality of frequency selection oscillators, a directional coupler, a phase lock loop, a miniature controller, a channel selecting switch, etc. When the signal regulating and changing device is arranged at any one point of the general cable television network, the network can become a working station network which can make the television signal and the monitoring signal alone or simultaneously sent in directional or undirectional way.
Description
The utility model is a kind of modulating signal device, refers to a kind of modulating signal device that is combined on the cable tv coax especially, makes supervisory control system borrow this device and cable television system to be combined into one, and the power supply of shared cable TV and television receiver.
Common supervisory control system and cable television system are all respectively established one's own system, and signal level that each system transmitted and content are different separately, so the holding wire that is used to transmit each system just can't be shared and need to lay separately, cause each system all need use a terminal organ independently, as television set, monitor etc., and system host, this not only causes the waste of resource and the loss of money, and makes operation seem difficult.For example, the general required line that draws of supervisory control system comprises that system host is to detector, video camera, acoustical generator, power supply, different circuits such as ground wire, singly be that video camera just needs four lines up and down, and if colour camera, then need add a RS-232 holding wire again, required wiring number may be above ten, this not only bothers in construction, and the circuit of being laid must be through special planning, interlocks preventing, the problem of making contact, and avoid the decoration in the family and display destroyed, cause needing to increase extra rehabilitation expense, and with the monitoring host computer is the wire laying mode at center, because of the influence of the power and the loss of signal, therefore can't do remote line.
First purpose of the present utility model just is to provide a kind of modulating signal device that utilizes existing cable tv coax to remove to transmit TV signal and pilot signal.
Of the present utility modelly advance a purpose, just be to utilize a kind of frequency difference to separate and the technology of anti-stop signal adverse current, do the transmission of TV signal and pilot signal.
A purpose more of the present utility model is to be to utilize a kind of all-channel tv receiver, removes to constitute the terminating machine of cable TV and the monitor of surveillance.
Another purpose of the present utility model is that the power supply that is to utilize the power supply of cable television system or utilizes external power source to pour into device pours into, and makes the modulating signal device can obtain working power.
Another purpose of the present utility model is to be to utilize cable tv coax and add/or the direction coupling device that included of modulating signal device, removes to form the node at TV/supervision networking, when its suitably during configuration, can form a unlimited networking of extending.
Above-mentioned purpose, can be finished by a coaxial cable that contains the modulating signal device insertion cable TV of modulating signal module, this modulating signal module mainly comprises image/sound modulator of handling TV signal, and make this TV signal avoid the gain amplifier of high frequency coupling and output attenuatoin, can limit the oscillator that the unlike signal frequency is passed through with several, insert the direction coupling device of smear with making signal, and but working frequency is arranged than accurate phase-locked loop and microcontroller, and but the pressurizer that can be made for selector switch that channel switches and suppling signal changing device stabilized power supply maybe can be introduced the feeding switch that external power source pours into etc.; The modulating signal device is set up when any point of general cable television network, can be made this networking become a kind of TV signal and pilot signal transmits simultaneously or directed the transmission or the work station networking of two-way transmission.
Above-mentionedly limit the oscillator that different frequency passes through, suitable configuration as band pass filter group and high frequency choke coil group, can with TV signal and pilot signal be done effective isolation and the signal adverse current prevents, this band pass filter component is high pass filter and low pass filter, make the record and broadcast and the connecing of cable TV signal of wireless television signal can borrow aforementioned direction coupling device smear, and borrow above-mentioned coaxial cable to transmit signals in the television set at rating family; Above-mentioned high frequency choke coil group forms suitable number, low frequency with non-television broadcasting frequency domain transmits supervision and control signal, wherein one group of high frequency choke coil loop can make the image monitoring signal borrow above-mentioned changing device to pass supervisory signal back the rating family, and can assign control command by the tuning controller at this rating family, see through the modulation and the transmission of above-mentioned changing device and coaxial cable, allow this image monitoring system, can do angle, orientation and the zone of long distance as equipments such as camera lens ZOOM, video camera The Cloud Terraces and adjust; Another group loop of this high frequency choke coil is transmitted the generally antitheft/signal of fire prevention detector with another low frequency and is reclaimed and look the family, to constitute a complete TV/monitoring system.
A kind of modulating signal device for being incorporated on the coaxial cable of cable television system, is combined into one with this cable television system, and power supply of shared this cable television system and television receiver; Above-mentioned modulating signal device comprises an also television signal processing circuit, and this circuit has: one image/sound modulator is for handling TV signal; One signal frequency selects control unit connecting above-mentioned television receiver and above-mentioned image/sound modulator, selective switching channels; One signal filtering amplifying unit is connecting above-mentioned image/sound modulator, for filtering different frequency signals and avoiding output attenuatoin; One wireless television signal draws and send the unit; And one directional coupler connecting the signal filtering amplifying unit, draw for wireless television signal and send the TV signal insertion that unit and modulating signal device produced smear; It is characterized in that: the full device of above-mentioned direction coupling is connected in a pilot signal treatment circuit, this pilot signal treatment circuit has: a gain amplifier is connected in above-mentioned directional coupler, for the loss and the decay of compensation TV signal, and take out undistorted TV mixed frequency signal output; And at least one high frequency choke coil is connecting above-mentioned gain amplifier, for being connected in a visual/non-visual supervisory control system, make the control signal of this supervisory control system send the image monitoring system that is sent to above-mentioned visual/non-visual supervisory control system through modulation by above-mentioned television receiver end, and aforementioned visual/non-visual supervisory control system scanned the signal of video signal that obtains behind modulation, pass above-mentioned television receiver back; If this high frequency choke coil can transmit for the signal of non-image monitoring system when not connecing image monitoring system, with the signal of detecting gained, pass above-mentioned television receiver back by detector one end behind modulation.
Wherein above-mentioned pilot signal treatment circuit has: the frequency of oscillation of first group of high frequency choke coil just can for the signal of video signal of above-mentioned supervisory control system by and pass above-mentioned television receiver back, and the control signal of above-mentioned television receiver end can be reached to the surveillance of above-mentioned generation signal of video signal; And second group of high frequency choke coil, its frequency of oscillation can supply to transmit the signal of antitheft/fire prevention detector to above-mentioned television receiver.
This changing device is characterized in that: its power supply is to be taken from pouring into of cable television system or external power source, and the feeding switch that this external power source pours into is to be connected to above-mentioned pilot signal treatment circuit or above-mentioned signal frequency selection control unit.
Wherein above-mentioned signal frequency selects control unit to comprise: one is connected in the phase-locked loop of above-mentioned image/sound modulator, with the frequency of calibration television channel; And be made for the all-channel selector switch that channel switches; And one microcontroller connecting above-mentioned phase-locked loop and above-mentioned frequency first-selection is selected switch.
The TV signal filtering amplifying unit of wherein above-mentioned image/sound modulator has: one increases amplifier is connected in above-mentioned image/sound modulator; One signal attenuator is in the hope of the high-frequency coupling of the best; One high pass filter passes through in order to the frequency that limits above-mentioned TV/sound modulator, and signal is introduced above-mentioned directional coupler for coupling.
Wherein above-mentioned directional coupler one end is connected in a low pass filter, and introduces the wireless television signal that above-mentioned coaxial cable sends.
Wherein above-mentioned image/sound modulator is a TV signal of sending 650MHZ～860MHZ.
The wherein above-mentioned coaxial cable pivoting point that is used to introduce wireless television signal, its TV signal of introducing is between 50MHZ～550MHZ.
Its output of the gain amplifier of wherein above-mentioned pilot signal treatment circuit has the signal output point of the smear of one 50MHZ～860MHZ, receives and selection for the all-channel tv tuning controller.
Wherein above-mentioned high frequency choke coil group is to be connected to a power regulator group, to obtain stable operating voltage.
The utility model can make cable television system and supervisory control system be incorporated into one, can save wiring and equipment.Utilize cable tv coax and add or direction coupling device that the modulating signal device is contained, remove to form the node at TV/supervision networking, when its suitably during configuration, can form a unlimited networking of extending.
The drawing explanation:
Fig. 1 is the circuit block diagram of the utility model.
Fig. 2 is the circuit diagram of Fig. 1.
Fig. 3 is the high-pass filter frequency response diagram.
Fig. 4 is low frequency control circuit calcspar.
Fig. 5 is low frequency input and low frequency output select circuit figure.
Fig. 6 pours into the device circuit diagram for power supply.
Fig. 7 is direct current feed circuit figure.
Fig. 8 is the application calcspar of the utility model at cable television network.
Fig. 9-Figure 10 is that the utility model is in family, in the networking of office block configuration illustration intention.
The embodiment that ginseng is following and graphic, so that further specify the feature and the principle of this creation:
The modulating signal device that the utility model provides shown in Fig. 1 and 7, for being incorporated on the coaxial cable of cable television system, be combined into one with this cable television system, and the electricity of shared this cable television system is former and television receiver TV; The modulating signal device mainly comprises an also television signal processing circuit 1, and this circuit has: one image/sound modulator 14 is for handling TV signal; One signal frequency selects control unit 1A connecting television receiver TV and image/pronunciation modulator 14, selective switching channels; One signal filtering amplifying unit 1B is connecting image/sound modulator 14, supplies to filter the signal of different frequency and avoid output attenuatoin; One wireless television signal draws and send unit 1C; And one direction coupling device 18 connecting signal filtering amplifying unit 1B, be made for wireless television signal and draw and send the TV signal that unit 1C and modulating signal device produced to insert smear.
The also television signal processing circuit 1 of Fig. 1 mainly comprises a channel button 11, a microcontroller 12, a phase-locked loop 13, one image/sound modulator 14, first gain amplifier 15, attenuator 16, high pass filter 17, directional coupler 18, low pass filter 19; Its medium frequency selects control unit 1A to be made of the voltage-controlled oscillator Vco that establishes that connects on a channel button 1, a microcontroller 12 and last image/sound modulator 14 the 3rd, 4,6,7 pin shown in Figure 2 of a phase-locked loop 13 cooperations, and this voltage-controlled oscillator Vco is made of Varactor Diodes, electric capacity and inductor loop; And high pass filter 17 and low pass filter 19 and first gain amplifier and second gain amplifier 20 are to constitute above-mentioned signal filtering amplifying unit 1B, and second gain amplifier 20 wherein is to be connected in directional coupler 18 outputs, supply to take out the TV signal of coupling to signal mixing output (Comb.Output), and even for above-mentioned pilot signal treatment circuit 2 structures, this high frequency choke coil is in the illustration of Fig. 2, be to be divided into first high frequency choke coil 21 and second high frequency choke coil 22, to form different vibrations and frequency filtering, the control signal that the hunting of frequency that one of them high frequency choke coil produced can allow the image scan signal and control this image scan equipment be able to by, the frequency of oscillation that another high frequency choke coil produced then transmits with the monitor signal for non-image; Aforementioned secondary signal amplifier 20 will and be selected switch 25 as the lock electric separation that external power source is locked with the first voltage stabilizing IC (23) that is used for obtaining pilot signal treatment circuit 2 burning voltages, the second voltage stabilizing IC (24) with high frequency choke coil 21,22 and constitute a complete pilot signal treatment circuit 2.
The main function of this signal mode transfer group 100 of the foregoing description, be to be to provide a kind of modulation of signal and the difference frequency of signal to transmit control, TV signal can be transmitted at high frequency, and pilot signal can transmit at low frequency, support and be connected by different hardware, can form the networking of a kind of TV and supervisory control system one.Gain amplifier as for above-mentioned first gain amplifier 15, second gain amplifier, 20 representatives, can do progression according to signal power and coupling demand changes, and the band pass filter of this high pass filter 17 and low pass filter 19 representatives, it also can cooperate the demand of circuit to make the change of position and filter range etc.And above-mentioned modulating signal module 100 can be the form of module or non-module on the implementation.
The image of the modulating signal module 100 of the 2nd figure/sound modulator 14 is that an ICI that can do image/sound signal processing amasss into circuit, the frequency oscillator that its 11st, 12 pin outer meeting resistance and electric capacity are constituted can produce such as be the secondary filter frequency of carrying of sound of 4.5MHZ; 19th, 20 pin supply entering of external image signal, can cooperate the effect of channel button 11, microcontroller 12 and phase-locked loop 13, and the frequency of selecting image to pass through is necessary for the frequency range that all-channel tv can receive, as 50MHZ～900MHZ.The selection of this frequency range and control reason, be because between aforementioned ICI the 3rd～7 pin due to the drift of the easy frequency of occurrences of formed voltage-controlled oscillator Vco, because in case produce frequency drift, just be easy to produce the interference of channel, particularly voice signal is invaded the image frequency section of adjacent channel, for example carry regulation with distribution of NTSC (U.S. television standard association) television channel and signal, it is the section of doing a frequency with every 6MHZ, each frequency zone all can transmit TV signal, and general TV signal is the synthetic of a kind of voice signal and signal of video signal, when transmitting, voice signal be with 1.25MHZ as the carrying of its SIF sound intermediate frequency, with the signal of video signal of the 4MHZ 0.75MHZ of being separated by, its composite signal is sent in two other ripple modulation modes, when occurrence frequency drifted about, SIF sound intermediate frequency was easy to invade adjacent frequency range.
In order to prevent this problem, the frequency of above-mentioned voltage-controlled oscillator must be very precisely, otherwise just can not get good recovering signal in end.Obtain frequency of oscillation accurately, can utilize aforesaid phase-locked loop ¨ to be serially connected in channel button 11, microcontroller 12, remove the electric voltage frequency that control IC I the 3rd pin～the 7th pin is produced, and provide the image fine setting control of 4MHZ with microcontroller 12, guarantee not drifting about of frequency, this voltage-controlled oscillator is by electric capacity, resistance or inductance and variable capacitance diode constitute oscillating circuit, the application of variable capacitance diode mainly is required in response to the frequency separation resonance of the higher-order of oscillation, in figure, this voltage-controlled oscillator is configured to the hyperfrequency resonant circuit of 650～860MHZ.And above-mentioned ICI the 14th pin and the 16th pin external single-ended output transformer balancing circuitry, the output of 1: 1 balance of one TV signal is provided, signal level is between 18～22dbmv, it is required to supply gain amplifier and band pass filter to couple a signal to directional coupler, so that in an embodiment, borrow another band pass filter in directional coupler with the 50～550MHZ that comes from coaxial cable, do the smear (synthesizing) of signal, so that can obtain the mixed filter output of 50～860MHZ at the output of second gain amplifier 20.
The above-mentioned gain amplifier that is disposed at the transformer output of single-ended balancing circuitry BALUN, need according to present embodiment, be defined as first gain amplifier 15, the suitable gain of TV signal outputting level is provided, as 10～32dbmv, effect with the π type attenuator 16 of example cooperation-3db, is high pass filter 17 for one 650～860MHZ and try to achieve the coupling of 75 Ω high-frequency resistances preferably as for the band pass filter that is connected to attenuator 16 outputs, can stop the signal of 50～550MHZ to enter, and allowing 650～860MHZ signal by carrying out the coupling of frequency to directional coupler 18, frequency response chart is as shown in Figure 3.And in the present embodiment, other has a band pass filter to be configured between directional coupler 18 and outer, coaxial cable Cable input, other is the low pass filter 19 of an introducing 50～550MHZ, this filter can stop entering of high frequency 650～860MHZ signal, and the pilot signal adverse current of low frequency is to coaxial cable, and disturb original 50～550 channel program, this low pass filter 19 is also introduced the signal that cable TV station receives the radiovision channel, allow cable television channels have the user can be under the cooperation of all-channel tv receiver, receive the program of cable TV and radiovision simultaneously, so after 20 pairs of direction couplers 19 of second gain amplifier are done the amplification of coupled signal, can receive under the smear output that the family utilizes 50～860MHZ and the state that its television set tuner is connected for cable TV, receive the TV programme of unlikely distortion.
The TV recovering signal of this unlikely distortion, image/sound the accent that is supposition Fig. 2 is 18～22dbmv with regard to device 14 outputting levels, and the assorted letter of output C/N is than being 60db, the gain of first gain amplifier is 20db (15), amplify assorted letter index 5db, general cable TV input signal position standard 0～15db, C/N is than being 42db, directional coupler decay number is 16db, can be regarded as thus assorted letter position accurate for-42dbmv～-27dbmv[0 subtracts 42 15 and subtracts 42 and draw aforementioned value], hence one can see that, from accurate need in assorted letter position that aforementioned image/sound modulator (14) comes less than-42dbmv, to avoid interference the signal of former cable TV not.
The circuit function of second gain amplifier 20, it is the insertion loss that is used for compensating low pass filter 19, also being used for the insertion loss of compensation direction coupler 18 and coaxial cord simultaneously transmits the line loss that signal produced, certainly also be to compensate the serial connection decay of several same signal changing devices, the application examples shown in Fig. 7～10.
Above-mentioned smear output loop is in the embodiment of the 2nd figure, be to be connected with two groups of high frequency choke coils 23,24, these two groups of high frequency choke coils 23,24 can prevent the intrusion of aforementioned 50～860MHZ TV signal, and provide the pilot signal transmission required, ginseng Fig. 2, Fig. 4 and shown in Figure 5, these two groups of high frequency choke coils 23 wherein, 24 formation, be by two groups of inductance, the resonant circuits that element constituted such as electric capacity, utilize the induction reactance of inductance that frequency is become through characteristic, can stop the generation of signal interference each other, and the frequency that can intercept disresonance is passed through, and anti-stop signal disturbs the adverse current of TV signal, in the embodiment of the 2nd figure, this high frequency choke coil 21,22 are configured to the vibration generator of 5MHZ and 6MHZ respectively, so that for different monitoring signal demand on the implementation.
Generally speaking, for example receives in the signal transmission of image and voice scan and the channel of television receiver, above-mentioned 6MHZ frequency of oscillation is configured to, carry the photography signal on the loop specially, and the vibration generator of 5MHZ, then be used as carrying of other detection signal, as fire prevention/antitheft ultrared sensing device, cigarette affair inductor; Movement of objects detector, fine motion device etc.This two-stage high frequency choke coil 23,24 operating voltage is different because of driving subject matter, The Cloud Terrace as CCDCAMERA video camera and its bearing of confession drives with DC12V, fire prevention/burglar detection device drives with DC5V or DC12, the generation of this DC12V and DC5V voltage, can utilize the power supply of the power supply supply of cable television system or outside to pour into device 26 obtains in the insertion point in loop, the LM7812 that mixes the first voltage stabilizing IC21 can obtain DC12V, the LM7805 of the second voltage stabilizing IC22 can obtain DC5V, for protecting the smooth execution of surveillance, the power supply supply should remain between DC15V～20V and be advisable.
The formation that pours into device 26 as for above-mentioned power supply is as shown in Figure 6, comprise an ac plug 261 and a power transformer 261 and the rectifier 263 more than at least one, with a filter capacitor 264, a voltage stabilizing IC265, a fuse 266, a power indicating circuit 267, a high frequency choke coil 268,1 Ω signal connectors 269, wherein, signal connector 269 check pivot connector, promptly be input for this device.
In Fig. 4, above-mentioned 5MHZ frequency signal can with the loop not the detector of the tip to movement of objects signal PER SENSOR signal, produce through smear loop 26 one accurately 5MHZ carry signal, be sent to the receiver 27 of general cable television system again by above-mentioned modulating signal device.Fig. 5 shows that then 6MHZ that first high frequency choke coil 21 produced is in the load mode as photography signal and photography control signal, this 6MHZ is in the load mode as photography signal and photography control signal, this 6MHZ signal circuit can be set the form of transmitted in both directions for, for example do the picked-up passback of video camera ZOOM to external signal, and control room such as wired television program receiving family, external control center etc., utilize its controller that disposes or see through TV tuner the The Cloud Terrace of CCD CAMERA and this video camera of bearing is done angle or direction adjustment, or other are got rid of true up the adjustment of making angle or direction.When signal transmitted, (demodulator was as the demodulator of television set and the two-way transmission media between CCD ZOOM as control room ADDRESS with microcontroller 12 can to see through the frequency oscillator 22, signal amplifier of 6MHZ and mixer 28.
The 1st figure application examples of ginseng Fig. 7-10, Fig. 7 has shown the serial connection example of several aforementioned modulating signal devices, in this application examples, can be on each device, pick up and join one group of hardware identical or inequality, as the video camera rotating platform, the ultrared sensing device ... Deng the equipment that belongs to low frequency control, then, this device not only can utilize cable TV station to be connected with the power supply and the signal transmission networking that receive between the family, simultaneously, also aforementioned low frequency control can be equipped the signal that be sensed, see through the processing of aforementioned modulating signal device, and send any one work station that is connected with induction point to or receive family or TV station, make work station, receiving family or TV station is utilized television receiver or suitable terminal equipment and is obtained this information, simultaneously, also can utilize work station, receive the suitable equipment of family or TV station, and assign indication or control command is given aforesaid low frequency control equipment, make low frequency control equipment be able to response process, extremely shown in Figure 10 as Fig. 8, no matter be the garage 29 of that a kind of kenel, building 30, all the cable television network that can see through between TV station and building connects, and utilize this device to form a kind of work station networking, so this device also can be applied to the hotel, on the film studio of TV station and master-control room or the sub-control room monitoring system design.
Claims (10)
1, a kind of modulating signal device for being incorporated on the coaxial cable of cable television system, is combined into one with this cable television system, and power supply of shared this cable television system and television receiver; Above-mentioned modulating signal device comprises an also television signal processing circuit, and this circuit has: one image/sound modulator is for handling TV signal; One signal frequency selects control unit connecting above-mentioned television receiver and above-mentioned image/sound modulator, selective switching channels; One signal filtering amplifying unit is connecting above-mentioned image/sound modulator, for filtering different frequency signals and avoiding output attenuatoin; One wireless television signal draws and send the unit; And one directional coupler connecting the signal filtering amplifying unit, draw for wireless television signal and send the TV signal insertion that unit and modulating signal device produced smear; It is characterized in that: the full device of above-mentioned direction coupling is connected in a pilot signal treatment circuit, this pilot signal treatment circuit has: a gain amplifier is connected in above-mentioned directional coupler, for the loss and the decay of compensation TV signal, and take out undistorted TV mixed frequency signal output; And at least one high frequency choke coil is connecting above-mentioned gain amplifier, for being connected in a visual/non-visual supervisory control system, the control signal of this supervisory control system can be sent by above-mentioned television receiver end, be sent to the image monitoring system of above-mentioned visual/non-visual supervisory control system through modulation, and aforementioned visual/non-visual supervisory control system scanned the signal of video signal that obtains behind modulation, pass above-mentioned television receiver back; If this high frequency choke coil can transmit for the signal of non-image monitoring system when not connecing image monitoring system, with the signal of detecting gained, pass above-mentioned television receiver back by detector one end behind modulation.
2, modulating signal device as claimed in claim 1, it is characterized in that: wherein above-mentioned pilot signal treatment circuit has: the frequency of oscillation of first group of high frequency choke coil just can for the signal of video signal of above-mentioned supervisory control system by and pass above-mentioned television receiver back, and the control signal of above-mentioned television receiver end can be reached to the surveillance of above-mentioned generation signal of video signal; And second group of high frequency choke coil, its frequency of oscillation can supply to transmit the signal of antitheft/fire prevention detector to above-mentioned television receiver.
3, modulating signal device as claimed in claim 1, it is characterized in that: its power supply is to be taken from pouring into of cable television system or external power source, and the feeding switch that this external power source pours into is to be connected to above-mentioned pilot signal treatment circuit or above-mentioned signal frequency selection control unit.
4, modulating signal device as claimed in claim 1 is characterized in that: wherein above-mentioned signal frequency selects control unit to comprise: one is connected in the phase-locked loop of above-mentioned image/sound modulator, with the frequency of calibration television channel; And be made for the all-channel selector switch that channel switches; And one microcontroller connecting above-mentioned phase-locked loop and above-mentioned frequency first-selection is selected switch.
5, modulating signal device as claimed in claim 1 is characterized in that: the TV signal filtering amplifying unit of wherein above-mentioned image/sound modulator has: one increases amplifier is connected in above-mentioned image/sound modulator; One signal attenuator is in the hope of the high-frequency coupling of the best; One high pass filter passes through in order to the frequency that limits above-mentioned TV/sound modulator, and signal is introduced above-mentioned directional coupler for coupling.
6, modulating signal device as claimed in claim 1 is characterized in that: wherein above-mentioned directional coupler one end is connected in a low pass filter, and introduces the wireless television signal that above-mentioned coaxial cable sends.
7, modulating signal device as claimed in claim 1 is characterized in that: wherein above-mentioned image/sound modulator is a TV signal of sending 650MHZ～860MHZ.
8. modulating signal device as claimed in claim 1 is characterized in that: the wherein above-mentioned coaxial cable pivoting point that is used to introduce wireless television signal, its TV signal of introducing is between 50MHZ～550MHZ.
9, as claim 1,7,8 described modulating signal devices, it is characterized in that: its output of the gain amplifier of wherein above-mentioned pilot signal treatment circuit has the signal output point of the smear of one 50MHZ～860MHZ, receives and selection for the all-channel tv tuning controller.
10, modulating signal device as claimed in claim 1 is characterized in that: wherein above-mentioned high frequency choke coil group is to be connected to a power regulator group, to obtain stable operating voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96241957 CN2283952Y (en) | 1996-12-31 | 1996-12-31 | Signal regulating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96241957 CN2283952Y (en) | 1996-12-31 | 1996-12-31 | Signal regulating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2283952Y true CN2283952Y (en) | 1998-06-10 |
Family
ID=33916246
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96241957 Expired - Fee Related CN2283952Y (en) | 1996-12-31 | 1996-12-31 | Signal regulating device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2283952Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103873807A (en) * | 2012-12-11 | 2014-06-18 | 张镇非 | Indoor splitter of cable TV system |
| CN106713810A (en) * | 2016-11-02 | 2017-05-24 | 宁波环球广电科技有限公司 | Gradient-level detection and automatic compensation circuit and control method thereof |
-
1996
- 1996-12-31 CN CN 96241957 patent/CN2283952Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103873807A (en) * | 2012-12-11 | 2014-06-18 | 张镇非 | Indoor splitter of cable TV system |
| CN106713810A (en) * | 2016-11-02 | 2017-05-24 | 宁波环球广电科技有限公司 | Gradient-level detection and automatic compensation circuit and control method thereof |
| CN106713810B (en) * | 2016-11-02 | 2023-06-06 | 宁波环球广电科技有限公司 | Slope, level detection and automatic compensation circuit and control method thereof |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
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