SU575782A1 - Device for monitoring communication channel quality - Google Patents

Description

The invention relates to communication technology and can be used in information transmission systems using composite telephone and telegraph radio channels.

A communication quality control device is known, which contains a low level control tone generator connected to the transmission path of the communication channel, an indicator of an overrun of an operating signal, an indicator of an underworking operating signal, the first and second inputs of which are connected respectively to the input of the transmission path and the output of the path channel reception, and a residual attenuation indicator connected to the reception path of the communication channel 1.

The disadvantage of this device is the lack of accuracy in assessing the quality of the communication channel when monitoring a composite telephone and telegraph channel.

The purpose of the invention is to improve the accuracy of assessing the quality of the communication channel when monitoring a composite telephone and telegraph communication channel.

To achieve this goal, the communication channel containing the low level control tone generator, connected to the input of the transmission path of the communication channel, indicates the operating signal level excess, the operating signal level decrease indicator, the first and second inputs of which are connected to the path input, respectively. transmission and output of the receive path of the communication channel, and the residual attenuation indicator,

Claims (1)

An edge distortion analyzer, a comparator, a telegraph filler amplifier / monitoring receiver, a display unit, four memory triggers, the first and second AND elements and the OR element are entered, connected to the receive path of the communication channel, and the output of the operating signal overload indicator is connected to the input the first memory trigger, the first output of which is connected to the first input of the first element AND, and the second input to the input of the element OR, the outputs of the elements of the first AND and OR are connected to the display unit, and the output of the residual damping indicator and through the second memory trigger is connected to the second input of the OR element, to the third input of which, through the second element AND and the third memory trigger, the output of the working signal-aLa attenuator is connected to the output of the telegraph channel receiving channel edge distortion which through the fourth memory trigger is connected to the second input of the first element I, and the transmission channel of the telegraph channel is connected through the amplifier of telegraphic parcels to the second input of the second element I and the input of the comparator, another input It is connected to the output of the reference receiver, and the output is connected to the display unit. Such a device provides an increase in the accuracy of the communication channel quality when monitoring a composite telephone and telegraph channel, automates this control and reduces the time spent on search and troubleshooting. The drawing shows the structural electrical circuit of the proposed device, the communication quality control device contains a low level control tone generator 1 connected to the input channel 2 of the communication channel, an operating signal 3 exceeding indicator, an operating signal deduction indicator 4, first and second the inputs of which are connected respectively to the input of the transmission path 2 and the output of the communication channel reception path 5, a residual attenuation indicator 6 connected to the communication channel reception path 5, an edge analyzer 7 distortion, comparator 8, amplifier 9 telegraph parcels, control receiver 10, display unit 11, memory triggers 12, 13, 14 and 15, first element 16 AND, second element 17 AND element 18 OR, the indicator output 3 exceeding the level The operating signal is connected to the input of the first memory trigger 12, the first output of which is connected to the first input of the first element 16 AND, and the second output to the input of element 18 OR, the outputs of the elements 16 AND and 18 OR are connected to the display unit 11, and the indicator output b residual attenuation through the second memory trigger The primary input element 18 OR, to the third input of which, through the second element 17 I and the third trigger 14 of the memory, is connected the output of the operating signal level decrease indicator 4, the output of the telegraph channel reception path 19 is connected to the input of the edge distortion analyzer 7 whose output is through the fourth trigger 15 of the memory is connected to the second input of the first element 16 I, and the transmission path 20 of the telegraph channel is connected through an amplifier of telegraph packages to the second input of the second element 17 I and the input of the comparator 8, the other input of which is connected to the output of the counter The terminal receiver is 10, and the output is with the display unit 11. The communication quality control device operates as follows. In addition to the information signals from the output of the 1 control tone generator, the transmission path 2 receives signals whose level is chosen so that they do not affect the transmitted information. Indicators 3 and 4, connected to transmission path 2, are configured so that, with an unacceptable increase or decrease in the level of the information signal, pulses appear at their outputs, which trigger triggers 12 and 14, respectively, into a different state. When the level of the reception channel 5 of the tone frequency channel is overestimated and there are no boundary distortions of information signals in the reception channel 19 of the telegraph channel to which analyzer 7 is connected, element 16 AND does not work, since trigger 15 is not transferred to another state. When the level of the path 5 is overestimated and the presence of edge distortions, the triggers 12 and 15 are transferred to another state, in which the output of element 16 And the signal is detected by the display unit 11. In the absence of information signals in the telegraph channel, from the output of amplifier 9 to the second input of element 17, there are no signals, although the first input of element 17 And receives signals of a decrease in level in the telegraph channel. This makes it possible to have no signal that the telegraph channel is faulty in the absence of information in it. Element 17 And a signal to the input of element 18 OR only if there are information signals in the telegraph channel while reducing their level. Since element 18 OR receives signals from indicator 3 exceeding the level, Indicator 6 residual attenuation, via trigger 13, as well as fault signals from element 17 AND, then at any combination of the signals indicated, element 18 OR triggers and issues an alarm signal to display unit 11. The input of the comparator 8 receives signals from the output of amplifier 9 and receiver 10. These signals are monitored by the operation of paths 2 and 20 by comparing the signals from the outputs of the radio channel and the telegraph channel. The comparison results are fed to the input of the display unit 11. Apparatus of the Device for Monitoring the Quality of a Communication Channel Containing a Generator