RU2131643C1 - Detector of control signals - Google Patents

Abstract

FIELD: communication devices, in particular, automatic control of various communication systems and communication channels. SUBSTANCE: device has frequency converter, high-frequency signals attenuator, which output serves as high-frequency output of detector. In addition device has serial circuit of modulator, commutator, attenuator of intermediate frequency signals, and interface unit. In addition device has device has manipulation unit, indication unit, and remote control unit. Inputs-outputs of remote control unit and its ready outputs are external inputs-outputs of remote control channels and ready outputs of control signal detector. EFFECT: increased functional capabilities, increased reliability of control. 2 dwg

Description

 The invention relates to communication technology and can be used for automated control of communication systems and communication channels for various purposes.

 A device for monitoring a communication channel is known on the transmitting side of which is a test signal sensor consisting of a carrier oscillator, a phase modulator, an amplitude modulator, an output unit, a pulse shaper, a frequency divider, and a sixth pulse isolator.

 The known device is used in a control system designed to calculate generalized parameters and assess the quality of a communication channel, but it is difficult to adapt it to verify real communication systems in real-life conditions.

 A known control signal sensor comprising a pulse generator, the output of which through a distributor is connected to the inputs of the decoder, an amplifier, a synchronization unit connected in series, a control frequency generator, a switching unit and an adder, as well as a program control unit, while the outputs of the decoder through the program control unit are connected to other inputs of the switching unit, the output of the adder is connected to the input of the amplifier, and the other output of the pulse generator is connected to the input of the synchronization unit.

 However, the known device does not provide complete control of modern communication systems.

 The objective of the invention is the expansion of the functionality of the sensor control signals and increase the reliability of control.

 This object is achieved in that in the sensor of control signals, comprising an amplifier, series-connected unit for program implementation and local control unit and series-connected reference generator, synchronization unit and synthesizer of control frequencies, a frequency converter is introduced, the first input of which is connected to the output of the control frequency synthesizer, and the output is connected to the input of the amplifier, an attenuator of high-frequency signals, the input of which is connected to the output of the amplifier, and the output is a high-frequency output s of the control signal sensor, connected in series with a modulator, the first input of which is connected to the third output of the synchronization unit, a switch, an attenuator of intermediate frequency signals and a matching unit, the intermediate frequency outputs of which are outputs of the intermediate frequency of the control signal sensor, probing signal generator, the first input of which is connected to the second output of the synchronization unit, and the output is connected to the second input of the switch, the manipulation unit, the input of which is connected to the first output of the unit synchronization, and the outputs - with the second inputs of the modulator and probe generator of signals, connected to the system trunk of the program implementation unit, a test memory block, an indication unit and a remote control unit, the input and outputs of the remote control channels and the readiness outputs of which are external inputs and outputs of the remote channels control and readiness outputs of the sensor of control signals, while the fourth output of the synchronization unit and the first output of the switch are connected to the second and third inputs eobrazovatelya frequencies, respectively, and outputs control unit programs are connected to the control inputs of the manipulation unit, the synthesizer reference frequency, a modulator driver probing signals, high frequency signal attenuator, a switch and attenuator intermediate frequency signals.

 The proposed solution meets the criteria of the invention of "novelty", because differs from the prototype in the presence of new functional elements and new relationships between the elements.

 The control signal sensor can be used as part of communication systems to generate a control signal (control message, which in its structure coincides with a working radiogram) in the conditions of real equipment operation, as well as to organize automated monitoring of the operability of technical equipment of communication complexes and communication channels for various purposes.

 In FIG. 1 shows a structural electrical diagram of the proposed device, in FIG. 2 - diagrams of the voltages at the inputs and outputs of the individual elements of the device: a) - at the clock input of the manipulation unit; b) - the START command to the manipulation block from the program implementation block; c) - interrupt requests from the manipulation block when operating in the modulator operation mode; d) - input of the modulator manipulation; d) - the output of the inverter modulator; f) - interrupt requests from the manipulation unit when operating in the operating mode of the probe signal generator; g), and) - the inputs of the manipulation of the shaper of the probe signal; h), k) - the outputs of the inverter driver of the probe signal.

 The control signal sensor comprises a reference generator 1, a synchronization unit 2, a control frequency synthesizer 3, a frequency converter 4, an amplifier 5, a high frequency (HF) signal attenuator 6, a manipulation unit 7, a modulator 8, a switch 9, an intermediate frequency attenuator (IF) ), matching unit 11, probing signal generator 12, program implementation unit 13, local control unit 14, test memory unit 15, indication unit 16, remote control unit 17. All listed blocks are connected as follows: 1-2-3-4-5-6, 2-4, 2-8-9-10-11, 9-4, 2-12-9, 2-7-8, 7 -12, 13-14, 13-15-16-17, 13-7, 13-3, 13-8, 13-12, 13-9, 13-6, 13-11.

 The sensor control signals (BCS) works as follows.

 When the DCS power is turned on, the self-monitoring program starts and after its implementation, the READY signal appears on the light panel of the display unit and on the ready outputs of the remote control unit (DU). If there is no READY signal, you can start the block control program (from the keyboard of the local control unit or via any remote control channel), which allows you to identify a faulty unit and, if you have a spare set of blocks, can quickly repair the BCS.

 Consider the work of DCS in remote control mode. The group of remote control channels allows you to connect to the BCS several channels of interaction with various technical means of the communication complex, and when working with one of the technical means that captured the interaction with the BCS through one of the remote control channels, the READY signals in the other remote control lines are removed, the remaining remote control channels can be serviced only after the release of a previously occupied channel.

 At the beginning of work, the technical tool that seized the channel of the DKS DKS channel introduces a message to set the control frequency, operation mode and speed, attenuation attenuation values, control test, and the number of repetitions of the control test.

 The structure of the control signal issued by the BCS is determined by the structure of the control test previously entered into the BCS and the established operating mode, therefore, before the start of the radiation, it is necessary to prepare the test. For example, in operating modes with relative phase shift keying, the control test is converted, relativity is entered into it, in operating modes intended for reception on a printing apparatus, service symbols, for example start and stop, are added to the test structure.

 At the start command, the control signal starts at the RF and IF DKS outputs; at the end of the control signal, the radiation ends, the start command is removed.

 On the remote control channel from the technical equipment connected to the BCS, you can make a request and receive a message about the installed BCS parameters, as well as receive confirmation of the correctness of the BCS or a malfunction of a specific unit.

 A program implementation unit is a controller based on a serial microprocessor and consisting of a microprocessor directly, a read-only memory device in which the program is recorded, and random access memory device that is used by the microprocessor during the program operation. At the outputs of the program implementation block, a set of control signals is generated that are sent to the DCS blocks: the operating frequency of the control frequency synthesizer is set, the modulator and probing signal conditioner are set, the attenuators of the RF and IF signals are attenuated, the switch is switched, a code is set in the manipulation block corresponding to the required speed of the telegraph signal or the duration of the probe signal. The interaction between the program implementation unit and the remote control unit is carried out by interruptions: for any access to the DCS via the remote control channels, an interrupt request is generated, which, when entering the program implementation unit, causes the program to be interrupted and the received message will be processed. An indication unit, a remote control unit and a test memory unit are connected to the system trunk of the program implementation unit.

 On the light panel of the display unit, the current state of the BCS is displayed - the frequency value, the name of the operating mode and the value of the operating speed or signal duration, attenuator attenuation value, control test parameters, information on the results of self-monitoring.

 The remote control unit is based on a serial transceiver designed for the hardware implementation of an exchange protocol with external technical means, and an interrupt controller that organizes interaction with the microprocessor of the program implementation unit. External inputs and outputs of the remote control unit and readiness outputs are galvanically isolated.

 A test memory block is installed in the BCS, based on a serial programmable read-only memory device, which allows recording control tests of the most common and widely used control signals even at the stage of manufacturing the BCS. In the process, it is enough to indicate the test number and the specified test will be prepared for radiation. Thus, there are three possibilities for entering control tests into the BCS: from the DCS tests memory block (by indicating the number of the control test), through the remote control channel from external technical means and from the keyboard of the local control unit.

 The local control unit allows you to set the BCS operation parameters directly from the keyboard, and the list of local control parameters coincides with the list of remote control parameters, including the possibility of entering control tests.

 The synchronization unit, to the input of which the signal of the reference generator is supplied, generates reference and clock signals for all DCS blocks, while ensuring high accuracy (no worse than the accuracy of the reference generator) of all components of the DCS output signal: the carrier of the IF and RF signals and the manipulation signal, which is especially important when using DCS as part of communication complexes for the formation of control signals in the conditions of real equipment operation.

 The control frequency synthesizer, the scheme of which is constructed by the method of active digital synthesis on the basis of phase-locked loops and controlled dividers, forms a discrete frequency network, which ensures the output of the RF DKS signals whose carrier frequency varies over a wide range and with a sufficiently small step at this range of changes in the output frequency of the BCS corresponds to the frequency range of communication complexes, in which the BCS is used. Each of the values of the carrier frequency in this case has a relative instability determined by the reference oscillator used.

 In the block of manipulation of clock pulses (Fig. 2a), time stamps are formed with the accuracy of the reference generator, which determine the speed of the telegraph signal or the duration and repetition period of the probe signal for a particular operating mode. By the start command (Fig. 2b), the manipulation unit generates requests (Figs. 2c, 2e) to the program implementation unit, according to which the control test begins to arrive byte-by-bye (when working with the modulator) or bit-by-bit (when working with the probe signal generator) a control test , which is gated by exact time stamps, is converted into a serial code and is output to a modulator (Fig. 2d) or to a probe of a sounding signal (Fig. 2g, 2i). The input of the control test at the request of the manipulation unit continues until the end of the test and the removal of the START command.

 The modulator provides the formation of frequency, phase and amplitude telegraphy signals with various deviations and operating speeds, as well as multi-frequency signals of frequency and phase telegraphy at the frequency of the inverter. The list of modulator operating modes covers the needs of modern as well as previously developed communication systems. When the modulator is set to the amplitude telegraphy operation mode and a manipulation signal is received from the manipulation unit (Fig. 2d), an amplitude-manipulated signal is generated at the IF frequency at the modulator output (Fig. 2e), where f1 is the carrier frequency of the output oscillation. In other operating modes, interaction with the manipulation unit occurs similarly to operation in the amplitude telegraphy mode.

 The probe signal generator provides the frequency-time structure of the probe signals at the IF output, which can be used to obtain information about the propagation conditions of radio signals, for which you need to connect the RF DKS output to the input of the transmitter, which is available in the communication complex, which will emit short-term probe radio pulses (a series of oscillations high frequency), separated by large time intervals (pauses). The structure of the pulsed probe signal can be described by the following parameters: the duration of the burst of pulses (t), the repetition period of the bursts (T), and the number of pulses in the burst. The duration and repetition period of the probe signal are formed with the necessary accuracy in the manipulation unit. The manipulation signal enters the probe signal generator (Fig. 2g, 2i), where it produces pulse modulation of the signal at the frequency of the inverter (Fig. 2h, 2k), where f2, f3 ... f6 are carrier frequencies.

 To optimize the parameters of the probing signals, long-pulse radiation (Fig. 2i) is used with a frequency that varies linearly according to a linear law, i.e., a burst of pulses can consist of several short pulses emitted at different frequencies (Fig. 2k). The frequency change of the IF signal during the arrival of each of the short pulses is made according to the control commands received by the probing signal shaper from the program implementation unit. The probe signal generator installed in the BCS is, in its structure, a high-speed frequency synthesizer operating according to the direct digital synthesis method, f3 ... f6 are the changing signal frequencies at the IF output.

 The spectrum of the signals generated in the modulators is transferred to the frequency range of the HF in the frequency converter using the reference signal coming from the synchronization unit. The frequency converter consists of two mixers: on the first mixer the signals from the output of the modulator and the synchronization unit interact, on the second - the signal from the output of the first mixer and the signal from the output of the control frequency synthesizer. After the frequency converter, there is a broadband amplifier and attenuator of the RF signals, which provides discrete attenuation of the RF signals.

 The IF output group is intended for parallel connection of several technical means, for example, radio receivers or demodulators, for the organization of their control, and also, if necessary, for analysis of a failed technical means by changing the parameters of the control signal of the BCS. The matching unit provides branching and electrical coupling of the FC DKS outputs with external devices.

 BCS can be used to test communication systems that do not have their own automated control. In this case, the outputs of the RF and IF DKS signals are connected to the corresponding inputs of the equipment under test, and the DKS is controlled from the keyboard of the local control unit.

 Thus, the proposed device allows, by generating a control signal, which coincides in structure with real radiograms, to pre-test the communication equipment and the communication channel in real conditions (before the start of the communication session), which increases the reliability of the control of the communication complex.

 In addition, the ability to connect DCS via remote control channels to automated communication systems, as well as discrete attenuation of IF and HF signals, the formation of telegraph signals with various types of modulation, including multi-frequency, the formation of sounding signals, high accuracy of the frequency of output signals, self-monitoring with identification a faulty block, writing standard tests to ROM expands its own functionality.

Claims (1)

 A control signal sensor comprising an amplifier, a local control unit and a program implementation unit connected in series and a reference oscillator, a synchronization unit and a control frequency synthesizer, characterized in that a frequency converter is introduced into it, the first input of which is connected to the output of the control frequency synthesizer, and the output is connected to the input of the amplifier, an attenuator of high-frequency signals, the input of which is connected to the output of the amplifier, and the output is the high-frequency output of the counter signals, serially connected modulator, the first input of which is connected to the third output of the synchronization unit, a switch, an attenuator of intermediate frequency signals and a matching unit, the intermediate frequency outputs of which are outputs of the intermediate frequency of the control signal sensor, the probing signal generator, the first input of which is connected to the second output block synchronization, and the output is connected to the second input of the switch, the manipulation unit, the input of which is connected to the first output of the synchronization block, and the outputs - with the second inputs of the modulator and probe generator of signals, connected to the system bus of the program implementation unit, a test memory unit, an indication unit and a remote control unit, the inputs and outputs of the remote control channels and the readiness outputs of which are external inputs and outputs of the remote control channels and outputs the readiness of the control signal sensor, while the fourth output of the synchronization unit and the first output of the switch are connected to the second and third inputs of the converter m, respectively, while the control outputs of unit programs are connected to the control inputs of the manipulation unit, the synthesizer reference frequency, a modulator driver probing signals, high frequency signal attenuator, a switch and attenuator intermediate frequency signals.

Images