SU362503A1 - ALL-UNION - Google Patents

Description

DEVICE CONTROL CHANNELS DATA TRANSMISSION

one

The invention relates to the field of telegraph communications, namely, devices for monitoring data transmission channels and can be used to measure the error probability of binary symbols, code words, and telegraph signs of both the communication channel and the transmission equipment. data to verify the detecting or correcting ability of the code.

A known analyzer for statistical studies of channels, which consists of a receiver and a transmitter, each of which contains two sensors of test signals: a static and a dynamic sequence. Counting circuits are implemented on decatrons, to the outputs of which electromechanical counters are connected. The analyzer can work in the mode of forming a static or dynamic sequence.

The analyzer provides a channel check and the passage of all binary bits through data transmission equipment, but does not allow checking the code noise immunity, does not work with subscribers in systems with code-address separation for periodic monitoring of channels, does not measure the number of distortions of code layers and telegraphic

characters in the received sequence or at the output of the data transmission equipment.

The main goal of the proposed device is to form a message consisting of a dynamic and static sequence of characters. This is achieved by the fact that the proposed device comprising a signal generation node, an input, a switch, a memory node, a recurrent register, an information extraction circuit, a comparison circuit and a propulsive pulse generator, introduces a control node, feedback keys and an unequality circuit connected to certain in a way.

The drawing shows a block diagram of the proposed device, where: 1 is a switch, 2 is a memory node, c is a recurrent register, 4-6 are feedback keys, 7 is an unequal scheme, 8 is a control node, 9 is a comparison circuit, 10 - Signal Generation Node End of Input, 11 - Signal Generating Node, Installation, 12 and 13 Buttons, 14: - Signal Node Input Node, / 5 and 16 - Comparison Circuits, 17 - Information Extraction Scheme,

18 is a generator of propulsive pulses, 19-29 are the inputs and outputs of the proposed device.

Before starting, when you press the button 12, the node // generates a signal

produces a signal that the device

is reset, i.e., all the nodes of the device are cleaned, where it could remain as an " imbedded " 1, can disrupt normal operation.

ha switch / selects the specified static combination corresponding to the address part of the pattern. By pressing the button 13, a signal is sent to the signal generation unit 14 Input, from which output signals are sent to the control unit 8, to start the key 4 and to enter through the switch / memory node 2 of the static combination. From the memory node, the static combination is entered into the recurrent register 3, from the output of which, via key 4, enters the input of the recurrent register, which in this case works as a ring register, forming a static sequence of t-bit characters. The signal from the intermediate turn of the control node 8 resets the key 4 and switches keys 5 and 5, through which signals from the intermediate bits of the register go to the unequal circuit 7 and from its output to the input of the register 3. The recurrent register begins to form a dynamic (pseudo-random) the sequence, which, just like static, goes to the data transmission equipment (output 75).

The message formation is terminated by a signal from the control node 8. This signal goes to the signal generating node 11 of the Installation, the signal generating node of the Input and to the data transmission equipment (output 20). According to the signal from node 11, the device is brought into operation) (one state. When a signal arrives from the data transmission equipment

14 (output 21} the device generates the following message consisting of static and dynamic sequences. At the receiving end, the formation of the control sequence is carried out as described for the transmission mode.

The sequence of test signals from the communication channel after the demodulator is fed to the input of the decoding node of the data transmission equipment and to the input 22 of the device. At the input 23 of the device, control signals are received from the data transmission equipment that are used in the information circuit 17 to extract it from the received sequences of informational characters. From the allocation circuit 17, the received sequence of information symbols is fed to the comparison circuit / 5, to the second input of which the sequence formed by the recurrent register is applied. At the output of the comparison circuit

15 (up 24) there is a result of comparing the binary symbols of the received and the check sequence.

The signals from the comparison circuit 15 are fed to the input cxeMbj of the comparison 16, the second input of which receives signals from the decoding device of the data transmission equipment

(input 25), corresponding to the code decoding result.

The interrogation of the comparison circuit 16 is performed by a signal from the data transmission equipment (input 23), which is fed to each code word. The comparison circuit 16 has two outputs: a codeword error (output 26) and an undetected codeword error (output 27).

The control sequence from the data transmission equipment at the address determined by the static part of the message is fed to the input 28 of the device. The second input of the comparison circuit receives the sequence formed by the recurrent register 3. 3. Comparison circuit 9 generates a signal (output 21) on the red t-bit sign. The number of bits is determined by the control node 8, from the intermediate output of which the signals are sent to interrogate the comparison circuit 9.

To the input 29 of the generator 18 advance their impulses received pulses from the data transmission equipment and from the generator output

18, they enter all the nodes of the device, which ensures the in-phase operation of the device and data transmission equipment. To the control sockets of the device output signals, electronic or

electromechanical counters.

Subject invention

1. Device for monitoring data transmission channels, the content of the signal output node “V.vod, krmmutato.r, memory node, recurrent register, information distribution circuit, comparison circuit and generator promoting

pulses, characterized in that, in order to form a message consisting of a dynamic and static sequence of characters, a control node, feedback keys and a non-equipotential scheme are entered into the device, the output of the signal output node of the Input is connected simultaneously to the control node , to the launch input lane. through the last connected switch and the memory node to the recurrent register, one of the outputs that is connected to the second input of the key of the bibling connection, the other two outputs from the intermediate bits of the register are connected to the corresponding inputs second and

of the third key of the reverse link, to the start inputs of the latter and to the reset input of the first key. back. link, one of the intermediate outputs of the control unit is connected, while the output of the first feedback key is directly and and the third key of the reverse link, through the inequality scheme, are connected to the input of the recurrent register. 2. A device of Claim 1, characterized in

that in order to detect the error in the kodo.vrm

In other words, the output of the binary comparison symbol of the received and reference sequences is connected to the input of the comparison circuit, the second input of the comparison circuit being the information input, and the third input is the control input of the device. 3. The device according to claim 1, characterized in that.

that, in order to determine the error in the telegraph sign, the second propelled output of the control node and the output of the recurrent register are connected to the corresponding inputs of the second comparison circuit, the third input of the latter is the second information input of the device.

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