SU1078638A1 - Device for monitoring deviations of level in communication paths - Google Patents

Abstract

A DEVICE FOR MONITORING CHANGES OF THE LEVEL IN COMMUNICATION TRACTS, containing a series-connected rectifier, a block of amplitude and temporary interrupt selectors and the first counter, the input amplifier, and the second and third counters, are different in that, in order to improve the accuracy of control by evaluating instant changes the input level control block, the level change analyzer, the control block, the memory block, the first and second comparators, the input of the input amplifier connected to the first input of the block adjusting the input level, the second input and the output of which are connected respectively to the output of the control unit and the rectifier input, the output of which is connected to the combined inputs of the first and second comparators and the first input of the level change analyzer. The second and third inputs and the output of which are connected respectively with the output of the external comparator, with the output of the memory unit and the input of the control unit (L outputs of the first and second comparators are connected respectively to the inputs of the second and third counters.

Description

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F1 / g. The invention relates to a long-distance technology and can be used with for automatic estimation of communication path parameters. A device for monitoring and analyzing signal level changes in communication channels is known, comprising an input matching unit, an analysis unit, a recording unit, a synchronizer and a control unit l. However, the known device has a low speed and low accuracy of control. Closest to the proposed technical solution is a device for monitoring measurements of levels in communication paths, containing a series-connected rectifier, a block of amplitude and time selector interrupts and the first counter, the output amplifier, and the second and third counters 2. However, this device has low accuracy. The purpose of the invention is to increase the value by estimating instantaneous changes in the level. To achieve this goal, a device for monitoring level changes in communication paths, containing a series-connected rectifier, a block of amplitude and time selector interrupts and a first counter, an input amplifier, and also a YOTO pip and a third counter, an input level control block, an analyzer level changes, the control unit, the memory unit, the first and second comparators, the output of the input amplifier is connected to the first input of the control level of the input level, the second input and output of which are connected respectively Correspondingly, with the output of the control unit and the input of the rectifier, the output of which is connected to the combined inputs of the first and second comparators and the first input of the level measurement analyzer, the second and third inputs and outputs of which are connected respectively to the output of the second comparator, the output of the memory block and the input the control unit, the outputs of the first and second comparators are connected respectively with the inputs of the second and third counters. FIG. 1 shows the structural electrical circuit of the device in FIG. 2 - stress diagrams for his work. The device for monitoring level changes in the communication paths contains a block of 1 memory, an input amplifier 2, a block of 3 adjusting the input level rectifier 4, block 5 of amplitude and temporal interrupt selectors, the first counter 6, the first and second comparators 7 and -8, respectively . the analyzer 9 of the level changes, the second and third counters 10 and 11, respectively, the control unit 12. The device works as follows. The transmission level of the path (Fig. 2a varies over time, these fluctuations cause current oscillations of the measuring frequency. The oscillations of the rectified current (Fig. 25 of the measuring frequency are fed to the inputs of the first and second comparators 7 and 8, Zina unit, the first input of the analyzer 9. Block 1 memory, depending on the input data, generates a program for analyzing changes in the current level of the measuring signal.The analysis program is formed depending on the length of the monitored path, its hierarchical level, as well as on the existing standards for change Neither level + uL oq norms for step-like level changes, short breaks and stability of residual attenuation. The signals generated by the analyzer 9, the sensitivity of which + UU J, are fed to the input of control unit 12, which forms the control signal of control unit 3 for controlling the input level. with a certain analyzer 9 speed and jump level + Uc changes the current level of the measuring frequency so that at the output of block 3 the signal level will be constant and equal to the nominal one. If the changes in the transmission rate exceed the limit allowed by the norms, the signal level at the output of block 3 will deviate from the nominal value. This deviation is determined by the fact that the rate of increase (decrease) of the output level is higher than the speed of regulation determined by the control unit 12. These deviations will be recorded by the first comparator 7 and displayed by the second counter 10. If the transmission level changes by an amount less than the set standard, then after some time the level at the output of unit 3 will be equal to the nominal one. If the transmission level changes by a large amount, the second comparator 8 is triggered and locked by the third counter 11. The analyzer 9 receives a blocking signal, the latter is transferred to the short interrupt measurement mode. In this mode, the control signal of the block 3 is formed with the boundary values of the discharge signal equal to the norm for the deviation of the transmission path level, i.e. when the transmission level deviates by a value acceptable by the norm at the output of the rectifier 4. The signal (Fig. 25) will be constant and equal to the nominal value Uf. Therefore, control of short-term transmissions is always conducted from the current value of the transmission level.

In the case of a short break (if the transmission level is lowered to a certain depth and T1 power), a block of 5 amplitude and temporary interrupt selectors breaks down and the first counter b records the presence of a short break, its duration. When the path transmission level is restored to the nominal value, the second comparator 8 is restored, thereby removing the ban from the analyzer 9. The analyzer 9 goes over

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Thus, the technical and economic efficiency of the proposed device is as follows: intermittent changes in the level of residual attenuation in communication channels significantly affect the reliability of the transmission of discrete information to high-speed modules using multiple level modulation, therefore, to increase the reliability of transmission of this information intermittent change in transmission level, which greatly improves accuracy.

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Claims (1)

DEVICE FOR MONITORING LEVEL CHANGES IN COMMUNICATION LINES, comprising a rectifier connected in series, a block of amplitude and time interrupt selectors and a first counter, an input amplifier, as well as a second and third counters, · characterized in that, in order to increase the control accuracy by assessing instantaneous level changes , the input level control unit, the level change analyzer, the control unit, the memory unit, the first and second comparators are introduced into it, and the output of the input amplifier is connected to the first input of the control unit input level, the second · ¹ rby input and output of which are connected respectively to the output of the control unit and the input of the rectifier, the output of which is connected to the combined inputs of the first and second comparators and the first input of the level change analyzer. The second and third inputs and the output of which are connected respectively with the output of the second comparator, with the output of the memory unit and the input of the control unit, the outputs of the first and second comparators are connected respectively with the inputs of the second and third counters. SU 10 FIG. ² * 4 □ О О 00 □ о