SU743215A1 - Device for monitoring radio relay communication line state - Google Patents

Description

one

The invention relates to the field of multichannel communication and can be used to monitor the state of radio-relay stations operating on the principle of time division of channels with modulation of the parameters of pulses by an analog signal.

A device for monitoring the state of a radio relay link station is known, which contains an encoder and a serially connected sensor in the transmission unit and a transmission distributor, and a serially connected clipping unit, a reception distributor, a dialer unit, a decoder, and a receiver I1 at the reception.

However, in radio relay stations with phase-pulse modulation, the use of a portion of the telephone service channel specter to transmit control signals necessitates the use of additional devices in order. shield system against false positives

due to conversational frequencies, which leads to the complexity of the equipment.

The purpose of the invention is to provide control signaling without interrupting the transmission of information over the overhead channel with phase-impulse modulation.

For this purpose, a device for monitoring the state of a radio-relay link station, containing an iGafrathor and serially connected service bits and a transmission distributor, and, at the reception, serially connected matching unit, receive distributor, dialer, receiver and receiver, off-price in the transmission is the first pulse divider and the first and second elements AND, and at the reception the third and fourth elements AND, the shift register, the control unit 20 of the indication and the second pulse divider. In this case, the input of the first pulse divider is combined with the clock input of the transmission distributor

the input KtssOporo is connected to the output of the first egggv & nent I, the first input of which is connected to the exhaust of the first target pulse, and the second input of the first element I receives a transmission enable signal. The signal outputs of the distribute distribute are connected to the corresponding inputs of the encoder. the output of which is connected to the first input of the second component I, the second input of which is connected to the start output of the transmission distributor, and the third input of the second element I receives impulses of the service information channel. The output of the third element And is connected to the input of the block agree. The output of the receive distributor is connected via a serially connected shift register, the fourth element I and the indication control unit connected to the output of the second pulse generator, the output of which is connected to the second input of the indication control unit, the first input and the second output of which are connected to the first and second control units. the inputs of the dial block. The clock inputs of the third element I, the receive distributor, the register and the display-control block are combined.

The drawing shows a structural electrical circuit of the proposed device.

The device for monitoring the state of the radio relay stations contains the encoder 1 and the serially connected service bits and the transmission distributor 2 on the transmission (in the drawing they are combined in one block and in series receive the serial-coordinator unit 3, the reception distributor 4, dialing unit 5 the decoder 6 and the receiver of the message 7. The device also includes in the transmission the first pulse divider 8 and the first and second elements And 9 and 10, and at the reception - the third and fourth elements And 11 and 12, the shift register 13, the control unit Avleni by the innation 14 and the second pulse divider

The output of the first pulse splitter

8 are combined with the clock input of the transmission distributor 2, the control input of which is connected to the output of the first element AND 9, the first input of which is connected to the output of the first pulse divider 8. To the second input of the first element AND 9 a transmission enable signal is received.

The signal outputs of the transmission distributor 2 are connected to the corresponding inputs of the encoder 1, the output of which is connected to the first input of the second element 10, the second input of which is connected to the start output of the transmission distributor. The third input of the second element And 10 receives impulses of information of the service channel. The output of the third element 11 is connected to the input of the matching unit 3, the output of the receive distributor 4 is connected through the serially connected register EQUIPMENT 13, the fourth element H 12 and the display control unit 14 are connected to the input of the second pulse splitter 15. The output of the second pulse splitter 15 is connected to the second input of the block control indicator 14, the first input and second output of which are connected respectively to the first and second control inputs of the dialer 5, the clock inputs of the third element 11, the receive distributor 4 and the control unit sh kahshey 14 combined.

The operation of the device is considered on the example of its use in a radio relay 24-X channel station with a phase-f module in a pulse-width module 1.

In the transmission for the operation of the device to the input of the first pulse divider 8 providing the specified periodicity of sending the signal code, pulses are sent to the backfill of the service channel with a duration of 5 ISS with a period of 125 µs, the output of the pulse divider is connected to one of the inputs of the first element I 9 that performs the out-of-loop control function the code to the second input of which a transmission enable signal is applied. The output of the And 9 element is connected to the input of the distributor of transmission 2, which is designed in conjunction with the encoder 1 to form a serial binary code of the transmitted signal. The signal outputs of the transmission distributor 2 are connected to the encoder 1, which is controlled, for example, from the corresponding station number switch and from the state sensors of the station equipment (not shown).

The start output of the transmission distributor 2 is connected to the second element 10, the first input of which is connected to the output of the encoder 1, and positive information pulses of the service channel are supplied to the third input. The output of the element And 10 is connected to the unit combining channels of a radio relay station.

At the reception, the positive pulses of all channels are fed to the first input of the third element I 11, and to the second input of the channel the positive pulses of the support of the service channel are supplied. Element And 11 provides the selection of the sequence of pulses of the channel pulses of the service channel. From the output of the element I11, the selected impulses of the service channel with a duration of 0.5-0.6 µs are fed to the matching unit 3, which increases the duration of the pulses of the auditory canal by such a value (6-7 ISS so that with its back front it crosses the shaft of the stand impulse shaft.

The output of the matching unit 3 is connected to the input of the receive distributor 4, designed to convert a serial code into a parallel one. As clock pulses, the peg pulses are applied to the reception splitter. The output of the reception distributor 4 is connected to the input of the shift register 13, which performs the function of isolating the starting pulse and protecting the device from false alarms. Stand pulses are used as clock for shift register 13. The first inverted output and the remaining non-inverted outputs of the parallel shift register code 13 are connected to the inputs of the fourth And 12 element, which separates the starting signal. The output of the element 12 is connected to the dial-up unit 5 and the display control unit 14, to which the stand pulses are also supplied and to which the output of the second pulse divider 15 is connected.

The parallel code from the output of the dial-up unit 5 is fed to the input of the decoder 6. The outputs of the decoder are connected to the receiver of message 7, intended for sound or visual display of the received signals.

In the absence of control signaling, positive pulses of the support of the service channel with a duration of 5.2 MKS and a frequency of 8 kHz are sent to the first divider.

pulses 8, dividing by P. The division factor h is determined by the number of pulses 1 spent for transmitting the control signals and the permissible level of interference in the service channel when transmitting the control signals, and is usually taken within the range of 60-4096.

At the output of the divider 8 with a frequency of 8 / pHz, the output positive pulses with a duration of 5.2 µs are applied to the element AND 9, to the second input of which the voltage of the logical control signal prohibits the output of the control signal is applied), In this case, the output of the element 9 is constantly the input of the transmission distributor 2 is supplied with a voltage of logic O, which with a clock frequency of 8 kHz is advanced in the transmission distributor. From the signal outputs of the transfer distributor, the parallel code (with a logic level 1) is fed to the encoder 1, and from the starting output, the voltage of logic 1 is fed to the input element 10.

The encoder 1, when applied to all its inputs of a voltage of logic 1, also has a voltage of logical 1 at the output. The third input of the E10 element is supplied with phase-modulated positive information channel pulses with a duration of 0.5-0.6 microseconds. In the situation considered above, all these pulses will pass to the output of the I1O element, which is connected to the unit for uniting the channels of the radio relay station. Therefore, when voltage is applied

to the input element

9, the operation of the service channel and its parameters do not change, since the service channel information pulses are not distorted, and their frequency remains the same (i.e., 8 kHz).

On the receiving side, the positive pulses of all channels are fed to the Oscine input of the element I11, to the second input of which the polishing pulses of the stand of the service channel are applied.

Element And 11 performs the selection of the service channel pulses from all channel pulses, since the pulse of the service channel with a duration of 0.50, 6 µs is in the middle of the pulse of the support of the service channel with a duration of 5.2. ms From the output of the element I11, the impulse of the service channel arrives at the matching unit 3, where their duration increases to 6-7 μs (i.e., the extended channel impulse ends after the trailing edge of the stand pulse, which advances the reception distributor 4). The output of the matching unit 3 is fed to a receive distributor 4 at a frequency of 8 kHz and signals are applied with a voltage of logical 1, which are impressed in it by pedestal pulses. From the output of the distributor, a 4, these signals are fed to the input of the shift register 13, in which the HIM pulses of the stand are also used as propellers. A parallel code from the non-inverting outputs of the shift register (except for the first one) is fed to the element I12. The first inverted output of the shift register is also connected to the input of the I12 element. When you move the shift register of logical 1, all the inputs of the 12th element (except for one o) are fed to logical 1 and to .. one is logical O. Therefore, at the output of the I12 element in these conditions will be logically O. This signal is sent to the dialing unit 5, prohibiting the cheating of the parallel code, and to the control unit: indication 14, the signals from the output of which in these conditions disable the output of the code from the dialing unit 5 to the decoder 6 and disconnect from the input second impulse divider owl 15 impulses sy coasters with a frequency of 8 kHz.

Such a deshi (|) rarator 6 together with n | And 1 message 7 will not issue an alarm ..

Let us now consider the situation when the input element And 9 on the transmission filed voltage logical 1, allowing the transfer code. Under these conditions, the POSITIONAL pulses for a 1 5.2 MKS frequency and a frequency of 8 / kHz will be transmitted through element I9 to the input of transmission distributor 2. From the first signal output of transmission distributor 2, at the next clock frequency of the stand after the output of the I9 element of the half-pulse, a voltage of logical O will be applied to the E10 element, as a result of which the next impulse of information of the service channel will not be passed to the output of the E10 element. This pulse skip is delivered with a start signal, accompanying the sending of any code pattern.

At the next 8 kHz clock cycle, the logic 1 voltage will advance in the transmission distributor 2 by one clock cycle and the logical O signal voltage will be set at its second signal output, which will be fed to the input of the encoder 1.

Depending on the code of the transmitted signal, 1frator 1 supplies this, for example, non-logical O to the input of the element

I10, or, irrespective of the logic level at the second output of the transfer distributor 2, supplies to the input of this ephemept a voltage of logical 1,

In the first case, after the start signal on the next clock, the pulse of the information of the service channel will not be passed to the output of the E10 element, and in the second case it will pass to the output of this element.

Similarly, at the next clock cycles, the logic 1 level promoted by the transfer distributor 2 will affect the E10 element.

After the arrival of the first start signal (there is no service channel information in the clock interval of the gampulus), the output of element 11 is impacted by the output of the service channel stand and there is no logic O at the next clock. The receive distributor 4 delays recorded on his

input signals at V -1 clock cycles. After G +1 clock cycle, the start signal will be rewritten from the last output of the receive distributor 4 to the first output of the shift register 13.

At this point in time, the parallel code set in the encoder 1 on the transmission will be recorded on all -1 outputs of the receive distributor 4.

The shift register 13 delays the signal recorded at its input for J clock cycles. EC; w before the starting signal in 1 positions logical 1) were transmitted. were present at the reception of all the 1g pulses of the service channel information), then after the logical logic O records in the first cell of the shift register 13 on all the register outputs will be logical 1. In this clock interval the output of the I12 element of the ICTS is logical 1, which realizes copying the parallel code from the outputs of the receive distributor 4 to the dialer unit 5 and simultaneously entering the run-off indication unit 14,

provides the installation of the initial phase of the second orc pulse divider 15 and allows the division of the pulses of the support of the service channel. Pulse divider 15 has a division factor equal to the division ratio of the pulse divider, 8. After the expiration of the clock cycles, after the division from the output of the pulse divider 15 has begun, a positive pulse is applied to the display control unit 14. If the transfer of the kotz on the transmission continues, then at the same time, the first output of the shift register 13 will be recorded starting from the repeated control signal. When a positive pulse coincides in time from the output of the pulse divider and from the output of the element I12, the indication control unit 14 outputs to the dialing unit 5 a signal of deciphering and indication JQ

received code. Upon completion of the transmission of the control signal on the transmission of AND clocks after the last starting signal, element I12 does not issue a positive pulse to dial pad 5 and indigence control block 14, as a result of which the code from the receive distributor 4 is rewritten to block 5 and the pulses pass stand on the pulse divider 15,

Thus, at the reception, the device is protected against accidental loss of the overhead channel information pulses, for example, at the expense of. pulsation interference, since the single interruption of these pulses, as well as periodic non-multiple Y pulses, will not be perceived as a control signal code.

Claims (1)

1. Gurov V.S. and ar. Transmission of discrete information and telegraph. M., Holy Hour, 1969, p. 68-69 and 11О-112 (prototype). On the 1510th channel with phase-pulse modulation, the first pulse divider and the first and second And elements are entered on the transmission, and the third and fourth And elements on the receive, the shift register, the display control unit and the second pulse healer, while the input of the first healer pulses combined with a clock input of the transmission distributor, the controllable EHOD is connected to the Povstadks / spuk. channel