SU633154A1 - Arrangement for automatic measuring of communication pulsed characteristic - Google Patents

Description

one

The invention relates to telegraph communication and can be used to automatically control and correct the quality of discrete information transmission channels.

A device for automatically measuring the impulse response of a communication channel is known, comprising a series of input key blocks, an intermediate accumulator block, a rewriting key block, a accumulator block, a read key block and an analyzer 1.

However, the known device has a low measurement accuracy.

The aim of the invention is to improve the measurement accuracy.

In the proposed device for automatic measurement of the impulse response of the communication channel, containing a series of input key blocks, an intermediate accumulator block, a rewriting key block, a accumulator block, a read key block and an analyzer, two And elements are added, a prohibition element, a delay element, a counter and a ring register, while the first input of the block of input keys is connected to the inputs of the prohibition element and the first element And, the output of which through serially connected second element And and the account The IR is connected to another input of the block of read keys, and the output of the prohibition element is connected to other inputs of the block of rewriting keys through serially connected delay elements and the second And element, to the other inputs of the block of intermediate drives via directly to the other inputs of the block of input keys register, and to the other inputs of the element of the ban and the element And the input signal.

The drawing shows a block diagram of the proposed device.

The device for automatic measurement of the impulse response of the communication cannula comprises a series of input key blocks 1, a block of intermediate drives 2, a block of rewriting keys 3, a block of drives 4, a block of read keys 5 and an analyzer 6, two elements 7 and 8, a prohibition element 9, the delay element Yu, the counter II and the ring register 12. At the same time, the first input of the block of input keys 1 is connected to the inputs of the prohibition element 9 and the first element And 7, the output of which is through the series-connected second element And 8 and the counter 11 n Connected to another input of the block of read keys 5, and the output of the prohibition element 9 is connected to other inputs of the block of rewriting keys 3 through serially connected delay elements 10 and the second element AND 8, to other inputs of the intermediate storage blocks 2 directly, and to other inputs of the input blocks keys I through the ring register 12, and to the other inputs of the element of the prohibition 9 and the element And 7 filed the input signal.

The proposed device operates as follows. At the first input of the input block, key 1 and the inputs of the prohibition element 9 and the first element And 7 signal from the detector output of the information receiver. The inputs of the prohibition element 9 and the first element And 7 also serves as synchronization pulses.

Elements 7, 8,9, 10, the counter P and the register 12 form a control unit that generates control pulses necessary for fixing the leading edge of information pulses. For this, the prohibition element 9 generates a pulse that triggers the ring register 12 at the moments when the first input of the block of input keys 1 contains null characters. The same impulse resets the voltages present in the intermediate storage device 2 and converts it to the initial state.

The output pulses from the ring register 12 alternately close the switches of the input key block 1, and the input signal levels corresponding to these moments are fixed on the capacitors of the intermediate storage unit 2. If, following the zero symbol, a single character comes to the first input of the input key block 1, then elements And 7 and 8 according to the momentum. The impulse from the output of the element And 8 causes the rewriting keys block 3 to rewrite the signal from the block of intermediate drives 2 into the block of drives 4. If the zero symbol comes again after the zero symbol, then the outputs of the elements 7 and 8 will not have a pulse and the signal will not rewritten from the block of intermediate drives 2 to the block of drives 4, and the pulse from the output of prohibition element 9 resets the previous result of writing the signal to the block of intermediate drives 2 and starts the ring register 12, which generates pulses for a new record Igna in the intermediate storage unit 2.

In the accumulator block 4, the signals are accumulated until the transfer pulse from the output of the counter 11 gives a command to the block of reading keys 5 rewritten, the result of the accumulation from the accumulator block 4 to the analyzer 6.

If, after a single character, a single character is returned to the input, it will not be written into the block of intermediate drives 2, since the ring register 12 will not be started.

Thus, the proposed device captures only the leading edges of information pulses and summarizes the results of the recording of a given number of leading fronts, pulses. This device has increased measurement accuracy as compared with the known.

Claims (1)

1. For the production of LG ° 2060636 / 18-09, cl. H 04 L 11/08, 1974, according to which peniciu-ie was received on the issue of the author's certificate.