SU1365362A1 - Apparatus for measuring signal delay time in transmitting line of audio frequency channel - Google Patents

Abstract

The invention relates to an electrically conductive communication measurement technique. The purpose of the invention is to reduce the measurement time and increase the measurement accuracy. The device contains a demodulator 1, a modulator 2, an adjustment unit (BR) 3 and 4 delay times, r-5 pulses, a frequency meter 6, a level indicator 7 and a channel i 8 tone frequency, consisting of transmission paths 9 and 12 and receivers, equipment 10 and 13 of group equipment of transmission paths of reception and remote power supply unit 14. Using known and normalized values of the delay time of the signal of the reception path 12, the delay time of the signal in the transmission path 9 is measured and further normalized. The lag time is measured by a frequency meter 6. From the total lag time, the lag time of the tract 9 signal is calculated and, if necessary, normalized (adjusted) by the BR 3. 1 sludge. with (L

Description

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o- 3 | gH is the frequency meter 6, to which signals are sent Starting from the generator 5 and Countdown from block A. From the total time of the delayed start, the latency signal of the transmission path 9 is calculated and, if necessary, normalized (adjusted) with the aid of block 3. The delay time of the signal of transmission path 9 does not change when switching on the equipment 10 and 13 for work and over the communication line. The lag time of the signal path 12 is monitored by the scheme -. demodulator 1, block 4 and frequency meter 6. The level is indicated on pointer 7.

ten

The invention relates to an electrically conductive communication measurement technique and can be used to measure and subsequently to normalize the delay time of a signal in the transmission path of a tonal frequency (PM) channel with an adjusted reception path.

The purpose of the invention is to reduce the time and increase the accuracy of measurement.

The drawing shows a structural electrical circuit of the device and a tone frequency channel with group equipment.

The device contains a demodulator 1, a modulator 2, the first 3 and the second 4 blocks controlling the delay time, the generator 5 pulses, the frequency 20 F. The formula of the invention is the toomer 6, the level indicator 7, in addition, the path 9 enters the channel 8 transmission, equipment 10 group equipment - - transmission path, extension cable 11, 25 receive path 12, equipment 13 group reception path equipment and block 14 remote power supply.

The device operates as follows, 30

Using known and normalized values of the delay time of the signal of the receiving path, the measurement and further normalization of the delay time of the signal are carried out. transmission path.

Hardware 10 and 13 set

A device for measuring the delay time of signals in the transmission path of a tone frequency channel, containing a level indicator, the input of which is connected to the q output of a tone frequency channel, characterized in that, in order to reduce the time and increase measurement accuracy, the series-connected pulse generator is introduced; and a modulator, the output of which is the input of the transmission path of the channel of the tonal frequency, an extension cable, connected between the transmission path and the reception path of the channel oh frequency, serially connected demodulator whose input is combined

c, similar to checking oneself. An extension 11 is used for this. Amplitude-modulated oscillations from modulator 2, controlled by measuring pulses of generator 5, are fed to the channel input, PM. The measurement of the delay time is carried out by frequency meter 6, to which signals are sent. From the total value of the delayed time, the latency of the signal of the transmission path 9 is calculated and, if necessary, normalized (adjusted) with the help of block 3. The delay time of the transmission path signal 9 does not change when the equipment is turned on 10 and 13 d l works and communication line. The lag time of the signal path 12 is traced by the scheme -. demodulator 1, block 4 and frequency meter 6. The level is indicated on pointer 7.

F. formula

F. formula

A device for measuring the delay time of signals in the transmission path of a tone frequency channel, containing a level indicator, the input of which is connected to the q output of a tone frequency channel, characterized in that, in order to reduce the time and increase measurement accuracy, the series-connected pulse generator is introduced; and a modulator, the output of which is the input of the transmission path of the tone frequency channel, an extension cable that is connected between the transmission path and the receive path of the channel frequency demodulator connected in series, the input of which is combined

with a level indicator input, a second lag time control unit and a frequency meter, the second input of which is connected to the output of the pulse generator.

Claims (1)

20 claims A device for measuring the delay time of signals in the transmission path of a tonal frequency channel, containing a level indicator, the input of which is connected to the output of the tonal frequency channel, characterized in that, in order to reduce time and improve measurement accuracy, a pulse generator is connected in series, the first control unit time delay signal of the receiving path, carry out the measurement and further normalization of the delay time of the signal in. transmission path. The equipment 10 and 13 are set to a mode similar to a self-test. To do this, use an extension cord 11. At the channel input, the PM is supplied with amplitude-modulated oscillations from a modulator 2 controlled by the measuring pulses of the generator 5. Measurement of the delay time and a modulator whose output is the input of the transmission channel of the tone frequency channel, an extension cord connected between the transmission path and a channel for receiving a tone frequency channel, connected in series to a demodulator, the input of which is combined with the input of the level indicator, a second delay time control unit and a frequency meter, the second input * of which is connected to the output of the pulse generator.