SU764142A1 - Device for checking quality of communication channel - Google Patents

Description

one

FIELD: radio engineering. It can also be used in the development of control equipment for various systems for the transmission of discrete information.

A device for controlling the quality of the communication channel is known, which contains a divider whose output is connected to the subtraction input of a reversible counter, to the addition input of which an error signal is given, and the outputs of the bits of the reversible counter are connected to the corresponding inputs of the weight unit 1.

However, the accuracy of the control of the known device is low.

The purpose of the invention is to improve the accuracy of control.

For this, the device for controlling the quality of the communication channel, containing (its divider, the output of which is connected to the subtraction input of the reversible counter, the addition input is supplied with the error signal, and the discharge outputs of the reversible counter are connected to the corresponding inputs of the weighting factor block, the counter, the first and second blocks of the analysis of the state of the counter, trigger;

ten AND elements and an OR element, while the information outputs of the reversible counter are connected to the corresponding information inputs of the first meter state analysis block, the control input of which is combined with the control input of the second meter state analysis block and with the first inputs of the first, second and

JO of the third flip-flops, the setup signal is given, the additional output of the divider is connected to the first inputs of the first and second And elements, the outputs of which are connected to Us with the first and second inputs of the third And, respectively, the output of which is connected to the input of the weighting unit polling and input zeroing additional reversible counter, the input of which is combined with the input of the addition of a reversible counter, the input of which is subtracted through the fourth element I is connected to the input of the subtraction dopol reversible counter, the installation inputs and outputs of the bits of which are connected respectively with the corresponding outputs of the block of weights and with the corresponding information inputs of the second

a block of analysis of the state of the counter, the output of which is connected to the second input of the second trigger, the first output of which is connected to the first inputs of the fifth And element and the sixth Element And, the second input of the second connector is connected to the additional output of the reverse counter or output through the element OR is connected to the first input of the seventh And element, the output of the first block of state analysis of the counter is connected to the second input of the first tri-jpa, the first output of which is connected to the second inputs of the fourth and fifth And elements and to the first input of the eighth element a AND, the output and the second input of which are connected respectively with the second input of the OR element and with the Additional output of an additional reversible counter, the signal output of which is connected to the first input: the ninth element AND,: the output and second input of which are connected respectively to the third input of the OR element and with the output of the tenth element: nta I, the first input of which is connected to the second input of the first element I and the second output of the first trigger, the second input of the tenth Element -I, and connected to the second input of the second element I and the second the second trigger and the output of the fifth element I is connected to the second input of the third .. trigger, the output of which is connected to the second input of the seventh element and. The drawing shows the structural scheme of the proposed device,

The device for monitoring the quality of the channel includes splitter 1, reversing 2, block 3 weighting factors, additional reversing counter 4, first and second blocks 5, b, analyzing the state of the counter, three triggers 7, 8, 9, ten elements AND 10-19 and the element OR 20 ...

The device works as follows .- ;; ../:., .- ..:. ::.; -; . ::.; -.-.- -; --- v: .x; v ..

The installation setup to its original state, coming from the external annual structure of perestroika On gyy5sbda1eGyorb 7, 8.9, sets the latter to the zero state; simultaneously the signal arrives on; the input ifnpkk Flame tesnovnogo and additional reversible counters 2, 4, allowing the connection of the information outputs of the latter to the inputs of blocks 5 and b

The reversible counter 2, when incoming to its input, the error signals, controls the quality of the communication channel, the maximum permissible degradation of which is set by divider 1 by the division method by the corresponding frequency reference factor input to the subtraction input.

Signal from direct trigger output

7 prohibits the passage of impulses from the output of the divider 1 through the element

And 13 to the input of the subtraction of an additional reversible counter 4, J OTO, when receiving error signals at its input, only works for the application,

The signal from the output of the element 19, to the two inputs of which the inverse outputs of the flip-flops 7 and 8 are connected, permits the passage of pulses from the output of the additional reversible counter 4. through the element 18 and 18 to the input of the element OR 20, and the signal from the inverse output of the trigger 9 supplied to the second input element I. 16, allows the passage of a pulse from the output of the element OR 20 connected to the first input of the element I1b; a signal of rejection of a discrete channel comes to the external equipment of radio tuning;

The signal from the inverse output of the trigger 7 permits the passage through the element I10 of pulses from the spinner divider 1 to the first input of the element I12 to the signal of the inverse output of the trigger

8- passing pulses through the element AND to the other input of the element

And 12, with the result that the pulses from the output of the element And 12 arrive at the polling input of the block 3 and to the input of the mouth;

For her, from the output of the element 12, the state of the reversible counter 2 is periodically rewritten into an additional reversible bustle 4, the previous state of which is erased. The period of arrival of the signal to erase the information of additional repiCHBHoro counter 4 and rewrite new information on the state of the channel of the reversible counter 2 through the block

3 determined by the output signals

divider 1. Block 3 performs large-scale conversions of the number of pulses. Rewritable from reversible counter 2 to additional renerysive counter 4 depending on

state of reversible counter 2. Additional reversible counter

4 calculates the errors occurring at its input over a period, T, taking into account the reversible state rewritten at the appropriate scale.

counter 2 for the previous period, in case the number of errors is countable, s & the period T, taking into account the previous reversing counter 2, exceeds a certain threshold value, then the output of the additional reversible counter, 4 shows a signal indicating / on withdrawing a discrete communication channel, which is connected through successively connected elements AND 18, OR 20, and And 16

arrives at the external equipment of the radio equipment adjustment, signaling that the quality of the discrete channel is worse than the norm.

Claims (1)

1. USSR author's certificate 5711919, cl. H 04 B 3/46, 1976 (prototype)