SU450375A1 - A device for monitoring linear path regenerators in a multichannel compression system with pulse code modulation and time division multiplexing (ICCM) - Google Patents

Description

one

The invention relates to the field of measurement.

Devices for monitoring linear path regenerators in a multichannel compression system with pulse code modulation and time division multiplexing (PCM-VD) are known.

Such devices have low measurement efficiency, since they require manual switching of the pulse density of the test signal and switching of the magnitude of the modulation frequency in subsequent NUPs.

In order to automate the control process, the proposed device additionally introduces a receipt signal sensor, the And schemes and memory registers, while the output of the receipt signal sensor is connected through the first And series, memory register and frequency divider connected to one of the inputs of the other scheme And, the output of which is connected via the second memory register to another input of the second frequency divider, and the control inputs of the AND circuits are connected to the master oscillator.

The drawing is a diagram of the proposed device.

The control unit of regenerators consists of master oscillator 1, frequency divider 2, 3, memory registers 4, 5, circuits "And 6, 7,

telemechanics device 8, modulating voltage generating unit 9 and unipolar pulses and test signal generating unit 10, and for automatically changing the pulse density of the test signal, the input circuit "And 6" is connected to the output of the telemechanics device 8 and the master generator 1, and for automatically changing modulation frequency input

circuit "And 7 is connected to the output of the splitter 3 frequency and the master oscillator 1.

The device works as follows. In-line path of the communication system with VD-PCM

A test signal is sent that has a certain triad density and a low-frequency modulated signal corresponding to the resonant frequency of the measuring filter located in this NUPe. If the linear path regenerator being tested is healthy, then the specified signal does not trigger the monitoring device located in this NUP. The signal of the receipt on the control pair does not enter the telemechanic device 8.

The telemechanic device 8, in accordance with the preset switching time, sends a control pulse synchronized with a clock frequency of the master oscillator 1

With the < 6 < 6 > circuit, triggering memory register 5, the division factor of divider 3 is changed. A signal having a different pulse density of the test signal is sent to the linear path. After passing all the commands in divider 3, i.e., checking all densities of the test signal (usually the density changes from 1/4 to 1/16 of the clock frequency), from the output of frequency divider 3 the control signal goes to the circuit input " And 7, then synchronously with the frequency of the master oscillator 1, this signal enters through memory register 4 to the input of frequency divider 2, which changes the modulation frequency or the number of the checked NUP, and the regenerators located in the next NUP begin. The cycle of operation is repeated.

If the regenerator is faulty, then at a certain pulse density of the test signal, the control device is triggered, the signal from which is fed to the telemechanic device 8, the latter is triggered and blocks the operation of the control device.

Subject invention

A control device for linear path regenerators in a multichannel compression system with pulse-code modulation and time division multiplexing (PCM-VD) containing a master oscillator connected to the inputs of the first and second frequency dividers, the outputs of which are connected via

modulating voltage and unipolar pulse shaping unit to the inputs of the test signal generating unit, which is different from the fact that, in order to automate the monitoring process, a receipt signal sensor, an AND circuit and a memory register are added to it, and the output of the receipt signal sensor through the first connected “AND” circuit, the memory register and the frequency divider are connected to one of the inputs of another “AND” circuit, the output of which is connected via the second memory register to another input of the second frequency divider, and The main inputs of the AND circuits are connected to the master oscillator.