SU1385301A1 - Device for remote monitoring level diagrams of non-attented repeater stations of cable communication lines - Google Patents

Abstract

The invention relates to radio engineering. The purpose of the invention is to increase the reliability of the control while expanding the functionality. The device contains a control channel 1, which is used as a telemechanical channel, a control key 8, an amplifier 10, an AGC block 11. The goal is achieved by the fact that a signaling unit 2 is inserted into the device at the servicing amplifier point, and at each unattended A voltage source 7 of the reference voltage, a serially connected interface block 3, an inverter 4, an OR 5 element and a comparator 6, as well as a distributor 9. 1 Il.

Description

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The invention relates to radio engineering and can be used to remotely monitor level charts and determine the location of damage at unattended amplification points (LLP) of multi-channel transmission systems with amplifiers having automatic gain control (AGC) on a pilot signal.

The purpose of the invention is to increase the reliability of the control while expanding the functionality.

The drawing shows a structural electrical circuit of the proposed device.

The device for remote control of the level diagram on the unattended amplifying points of the cable line contains a control channel 1 for which the telemechanical channel is used, on the serviced amplifying point (AUP) there is an alarm block 2, and on each NUP there is an interface 3, inverter 4, element OR 5, comparator 6, reference voltage source 7, controllable switch 8, distributor 9, also shows amplifier 10 with AGC 11 NUT1,

The device works as follows. .

When the voltage of the control frequency (RC) rises above the nominal value from the output of the AGC block 11 to the NL, the voltage U U goes through the block 3 of the interface (from its first output) to the first input of the element OR 5, and then to the first input of the comparator 6, where ck is compared with the value of the reference voltage Uj produced by the source 7, the output of which is connected to the second input of the comparator 6. When the value U (m exceeds the voltage U j, the voltage appearing at the output of the comparator 6 causes the control signal circuit to close key B, which is a certain point in time, determined by the cyclical operation of the distributor 9, through the distributor 9 closes the linear circuit of the control channel 1, which leads to an alarm signaling by the signaling unit at the control unit 2. When the voltage drops below the nominal voltage, i) through the unit 3 wives (from his second output) and inverter 4

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arrives at the second input of the element OR 5, and then at the first input of the comparator 6, where it is also compared with the value of the reference voltage U generated by the source 7. The device then works similarly to the case of an increase in voltage of RC.

Thus, when the output of the amplifier 10 NUP voltage at the output voltage varies by an amount exceeding the allowable value, i.e. when the inequality is fulfilled, where the difference between the voltages hh e, which characterizes the threshold of the tolerance control, or the threshold of operation of the comparator 6, is valid, the switch 8 closes through the distributor 9 into the control channel 1. The 2-signaling unit starts the distributors 9 alternately located in different LLPs, and polls the state of the sensors located in LLP, including the control key 8. At this, the alarm unit 2 records the number of the damaged LLP. The control channel of the transmission system is used as the control channel. The service communication channel is hereby used for its intended purpose.

Form ula invention

A remote control device of the level diagram on the unattended amplification points of the cable line, containing a control channel, and at each unattended amplification point, a control key, characterized in that, in order to increase the reliability while expanding the functionality, on the served amplifying A signaling unit connected to the control channel is inserted at the point, and at each unattended amplifier point a reference voltage source but connected by the interface unit, the input of which is connected to the output of the automatic gain control unit of the amplifier of the unattended amplifying point, inverter, OR element and comparator, the second input and output of which are connected respectively to the output of the reference voltage source and the control input of the control key, distributor, the corresponding inputs and outputs are koto313853014

The second output of the master key and the inputs of the control cap of the interface are connected to the second terminal, and the quality of which is used as the input of the OR element.

Claims (1)

Claim A device for remote control of the level diagram at maintenance-free amplification points of the cable communication line, containing a control channel, and at each maintenance-free amplification point, a controlled key, characterized in that, in order to increase reliability while expanding the functionality, a signaling unit is introduced at the serviced amplification point, connected to the control channel, and at each maintenance-free amplification point, a reference voltage source is introduced, connected in series in-line interface unit, the input of which is connected to the output of the automatic gain control unit of the amplifier of a maintenance-free amplifier item, an inverter, an OR element and a comparator, a second input • and an output of which are connected respectively to the output of the reference voltage source and the control input of the controlled key, the distributor, the corresponding inputs and outputs which is connected to the outputs of the controlled key and the inputs of the control channel, in which the telemechanics channel is used, the second output being used for pairing connected to the second input of the OR element.