SU1246383A2 - Device for measuring transient effects among paths - Google Patents

Abstract

The invention relates to communication technology. The functionality is expanded by measuring non-linear transitions. The device contains at the transmitting station 1 two generators 2 and 3, meter 4, frequency doubler (UCH) 5, modulator tor.6, band-pass filter (PF) 7, relay 8, rectifier 9 and low pass filter (LPF) 10 and, at the receiving station 11, the control current generator 12, the frequency converters 13 and 15 and the frequency generator 14 and 16, as well as the lines 17-20 of the forward and reverse directions of the two paths. When measuring nonlinear transitions in the paths to the inputs of the modulator 6, signals are received from generator 3 and through UF 5 from generator 2. Next, the signal passed by the PF 7 and rectifier 9 is fed to relay 8. Relay 8 connects the outputs of generators 2 and 3 to the line 17 and 19 forward direction of the 1st and 2nd paths, and the output of the meter 4 through the low-pass filter 10 k-line 18 reverse direction of the 1st path. T.V. stub connections are provided at receiving station 11 in both paths. The device also measures nonlinear transitions of lines 17 and 19 of the forward path and lines 18 and 20 of the reverse direction of the two paths. The goal is achieved by introducing a generator 3, a UCh 5, a modulator 6, a PF 7 and 16, a relay 8, rectifier 9, and a low-pass filter 10. 1 sludge. ) O) CO 00 00

Description

I1

The invention relates to communication technology and can be used to measure transient effects in paths of multi-channel transmission systems.

The purpose of the invention is to expand the functional capabilities by measuring non-linear transitions.

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

The device contains in the transmitting station 1 the first 2 and second 3 generators, meter 4, frequency doubler 5, modulator 6, band pass filter 7, relay 8, rectifier 9 and low frequency filter 10 at receiving standard 11 - control generator 12 , the first frequency converters 13 and 13, the band-pass filters 14, and 14, the second frequency converters 15 and 15, the additional band-pass filters 16 and 16 ,. The transmitting station 1 is connected to the receiving station 11 by lines 17 and 18 of the forward and reverse 25 f directions of the first path, as well as lines. 19 and 20 of the forward and reverse directions of the second path.

When measuring nonlinear transitions in the paths at transmitting station 1, the signal from the first generator 2 is fed through frequency doubler 5 to one of the inputs of modulator 6. Another input of modulator 6 during the whole measurement of nonlinear transitions receives a signal f second generator 3. As a result, a signal appears at the output of the band pass filter 7. This signal through the rectifier 9 is fed to the relay 8. As a result, the relay 8 is activated and connects the output of the first generator 2 to the line 17 in the direct direction of the first track with its contacts. Other contacts of the relay 8 connect the other output of the first generator-2 and the output of the second generator 3 in: line 19 in the forward direction of the second path, and input of meter 4 through the low-pass filter 10 to the reverse path 18 of the first path. Thus, the signal from the second generator 3 provides for the formation of stub connections at the receiving station 11 in both the first and 55 second paths. Since the output of the band-pass filter 14 has a high level signal, it is affected by 2463832

enters the control oscillator 12 and tunes it to the frequency f. The differential frequency f - i falls in the passband of the additional

5 band filters 16 and 16. Due to this, the stub connections on the first and second paths are preserved. To measure the nonlinear transitions of the line 17 in the forward direction — to the first path from the first generator 2, a signal with the frequency fj is given. The frequency f., Is chosen so that the signal after conversion in the first transducer 13 does not

15 would fall into the passband of the band-pass filters 14 and 16. The combination-on frequency 2f - f falls into the passband - only the band-pass filter 14. .

20 For the measurement of nonlinear transitions of the line 18 in the reverse direction of the first path from the first generator 2, the signal is given at a frequency f. In this case, the frequency f is chosen equal to

etc

5 that provides passage

control signal only through a band-pass filter 14 ,.

The frequency of the combinational product in this case is 2 f - {.

30 To measure the nonlinear transitions of the line 19 in the forward direction of the second path from the first generator 2, a frequency-f pilot signal is applied. The frequency fj is chosen as follows.

.. so that after converting the frequency combinator pr - in the frequency converter 13, it would fall into the passband of only the bandpass filter 14 ".

Q To measure the nonlinear transitions of the line 20 in the opposite direction of the second path from the first generator 2, a frequency f is applied. The frequency f is chosen equal to {(pj, which ensures the passing of the control signal only through the filter Mj. The frequency of the combinational product in this case is equal to -Hz f... For all measurements, the meter 4 is automatically tuned due to its connection with the first generator 2 .

The measurement of linear transitions is carried out as in the known device.

Claims (1)

Invention Formula A device for measuring transition. inter-pathway effects 5 that provides passage 31 At the transmitting station, the meter and the first generator, the first output of which is connected to the forward direction of the first path, the second output to the first input of the measuring instrument, the second input of which is connected to the reverse direction of the second path, at the receiving station - a control generator and two circuits , each of which contains serially connected first frequency converter, band-pass filter and second frequency converter with the first input of the first frequency converter of each circuit connected to the direct line directions of the corresponding path, and the output of the second frequency converter of this circuit is connected to the reverse direction line of the same path, the second inputs of the first and second frequency converters of each circuit are combined and connected to the corresponding outputs of the control generator, which is functionality by measuring nonlinear transitions, a second generator, a low-pass filter and a serially connected Editor G. Volkova Order 4023/56 Compiled by V.Kamal gin Tehred V. Kadar Proofreader E. Sirohman Circulation 624 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow,, Raushsk nab., 4/3 Production and printing company, Uzhgorod, Projecto st., 4 463834 a frequency doubler, a modulator, a bandpass filter, a rectifier and a relay, and the frequency doubler input is connected to the third output of the first generator 5, the fourth output of which is connected to the first output of the second generator Tsaer and . whip relay contacts connected to the forward direction of the second line 10 paths, the line of the reverse direction of which is connected in series through the second normally open relay contacts and the low-pass filter is connected to the line of the reverse 15 of the first path, the straight line direction of which through the third normally open contacts of the relay is connected to the second output of the second generator, the third output of which is connected to another input of the modulator, and the output of the band-pass filter connected to the first input of the meter, at the receiving station each chain introduced additional bandpass 5 a filter, the input of which is connected to the output of the first frequency converter and the input of the second frequency converter, in this case the control input of the generator is connected to the output Q bandpass filter circuit of the second path.