SU1197105A1 - Device for measuring transient effects between channels - Google Patents

Abstract

The invention relates to communication technology. At the transmitting station, the control signal from the generator of the control signals 1 enters the meter 2 and into the channel 10 in the forward direction of the first path. At the receiving station, this signal goes to the stub connector (AL) 3. The intermediate frequency signal, from the AL 3 output through the band-pass filter 9, enters the AL 3 of the Second path. In AL 3, the signal through the inverter 4; by- . steps into channel 13 of the reverse direction of the second path. At the receiving station, this signal passes to meter 2, where the signal level of the first frequency is measured. The signal c from measurer 2 switches the electronic key 8. As a result, the control signal generator 1 is connected to channel 12 in the forward direction of the second path. The control signal of the second frequency through the AL 3 enters through the channel 13 of the reverse direction of the second path to the meter 2. The measurement of interference from the influence of one path on the other is made. Each ALS with (L stands for the corresponding IF 4, bandpass filter 5 and IF 6. The carrier frequency signal from the control generator 7 is fed continuously to IF 4, 1 6 loop connectors. 1 ill. O L7 Si Tract I fl g Tferrm and 13

Description

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The invention relates to a communication technique and can be used to measure transient effects between cable link paths.

The purpose of the invention is to increase the measurement accuracy.

The drawing shows a structural electrical circuit of a device for measuring transient effects between paths.

The device contains a generator of control signals 1, meter 2, first and second pin connectors, first frequency converters, band-pass filters 5-5j, second frequency converters 6. -62, control generator 7, electronic switch 8, band-pass filter 9, channels .10 and 11 of the forward direction of the first path, channels 1 and 13 of the forward and reverse direction of the second path, delay element 14.

A device for measuring transient effects between paths works as follows.

From the output of the generator of control signals 1 to the channel 10 in the forward direction of communication of the first path, the control signal of the first frequency is given. At the receiving station, this signal comes to the input of the first loopback connector 3. From the control generator 7, the carrier frequency signal is constantly supplied to; the first and stub connectors 3 and Sj. In the result. The output of the first frequency converter 4 of the first stubble connector 3 is formed by an intermediate frequency falling into the passband of the band-pass filter 9.. Thus, under the influence of the first frequency, a stubby connection is formed between the channel 10 in the forward direction of the first path and the channel 13 in the reverse direction of the second path through the frequency converter 4 of the first loop connector 3, band-pass filter 9, the frequency converter 6 of the second stub. connector 3. At the front of the station, the signal of the first frequency of the meter 2 is measured. In addition, the output of the meter 2 produces a signal, under the influence of which the electronic switch 8 connects the output of the control signal generator 1 to the channel 12 of the forward direction of the second

go tract. Then, the pilot signal generator 1 is rearranged to a second frequency, which controls the second pseudo connector 3.. At the same time, the switching time from the first to the second frequency should not exceed the delay time of the delay element 14. Due to this, the electronic key 8 remains in the closed state and the control signal of the second frequency passing through the second loop connector 32 through the frequency converter 4, through the band-pass filter 5 and the frequency converter (C, enters the input of the meter 2. The signal level differs from the nominal account for the attenuation introduced by the second path.

Then, a measurement is taken of the fur from the INFLUENCES of one path to another, just as this is done in a known device. The calculation of the magnitude of the transitional effect is carried out according to known formulas.

Claims (1)

Invention Formula A device for measuring the transition effects between paths, containing at the transmitting station a series-connected pilot signal generator and meter, the second output of the pilot signal generator is connected to the forward path of the first path, and the reverse path of the second path is connected to the second input of the meter, at the receiving station - a control generator, a disconnection and a second stub connector, each of which contains a series connected first frequency converter, a band pass the filter, the second frequency converter, whose input is the output of the spade connector, whose input is the input of the first frequency converter, the inputs of the first and second slot connectors are connected to the forward direction channels of the corresponding paths, and the outputs are connected to the reverse paths of the same paths The control inputs of the first and second converters are frequent. The stub connector connectors are connected to the corresponding outputs of the control generator, which is in accordance with the accuracy of measurement, giving station entered the element for the second path, at the receiving station holder and electronic key, control is introduced by half-field filter, input The input input of which is connected through which is connected to the output of the first delay element with the output of the meter, the frequency converter of the first stubway two generator output of the control connector, and the code is connected frequency through the electronic key sub-to the input of the second converter, which is separately connected to the channel of the forward direction of the second daisy-chain connector.