SU900465A2 - Telegraph receiver with self-check - Google Patents

Description

one

This invention relates to a communication technique, in particular, to an electronic telegraph receiver.

According to the main auth. No. 585623 is known a receiver of telegraph apparatus with automatic control, containing an input unit connected to a receiver-dialer unit via an integrating unit, and one of the outputs of the receiver-dialer unit is connected to the jc input of the start-stop trigger, the other input of which is connected to the output of the integrating unit, and the output is connected to the I element, the second input of which is connected to the master oscillator, and the output - to the input of the divider connected to the receiving-dialing unit, entered the start-stop cycle driver, two differentiating elements, g An additional trigger and two elements And, the delay line and the element LII, moreover, the input of the driver of the start-stop cycle is connected to the output of the integrating unit, and

the output through the first differentiating 1st element is connected to one of the inputs of the AND element, and through the second differentiating element to one of the trigger inputs, one of the outputs of which is connected to another input of the AND element, the output of which is connected to the input of the OR element, the other input connected to the output of the element I, one input of which through a 10 delay line is connected to the output of the trigger, and the other is combined with the input of the trigger and with one of the outputs of the pickup unit P.

However, the well-known receiver works with the lack of reliability of the received information.

The aim of the invention is to increase the reliability of the received information.

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To do this, a parallel code checker and a serially connected glare check of a serial code and a comparison block, the output of which is connected to the auxiliary input of the OR element, are entered into the receiver of the telegraph apparatus with autocontrol, and the second and third inputs of the comparison block are respectively connected to the output of the parallel code checker and with the input of the additional trigger, and the input of the sequencer code check block is connected to the input of the start-stop cycle shaper. The drawing shows a structural electrical circuit of the proposed telegraph apparatus with automatic control. The telegraph receiver with autocontrol contains an input unit 1, a receiving-dialer unit 2, an integrating unit 3, a start-stop trigger 4, an AND 5 element that specifies a generator 6, a divider 7, a driver of the start-stop cycle, the first and second differentiating elements 9 and 1 are additional trigger 11, elements AND 12 and 13, delay line 14, element SHIII 15, parallel code test block 16, sequential code check block 17, comparison block 18. Receiver telegraph apparatus with auto-control works as follows. The received code combination, after electrical conversion, by the input unit 1 is fed to the input of the integrating unit 3, with which the exclusion of fragmentation is excluded from the incoming pulses. With the output of the integrator: 5) 3 start-stop transitions of the start-stop trigger 4 is set at which its output signal resolves the pulses of the master oscillator 6 to flow to the input of the divider 7 whose input controls the operation of the receiving and dialing unit 2. When the first and the following elements of the code combination to the input of the receiver-dialing unit 2, the signal 1 moves from the input to the output of the receiver-dialing unit 2. Due to this, when receiving the stop element of the code combination at the output of the receiver-on boron block 2 generates a start end stop signal. With this signal, the start / stop trigger 4 is set to the initial stop position. The received combination after the registration of the last information element with a parallel code is read from the receiving-dialing unit 2. With the appearance of the start transition, the driver of the start-stop cycle is started at the output of the integrating unit 3 and a signal of the duration equal to the start-stop cycle duration is generated. On the leading edge of this signal, the second differentiating element 10 is triggered. In this case, the additional trigger 11 is set to a state in which the enable signal is input to the input of the element 13, and a prohibition signal is sent to the input of the element 12 through the delay line 14. If a . during the time of action of the output signal of the imager 8 of the start-stop cycle, one signal of the end of the cycle arrives (with the receiver functioning correctly), then the additional trigger 11 is set by this signal to the state that prohibits the first differentiating element 9 from passing through the AND element 13 Element OR 15 signal error in this case is absent. In the absence of a signal of the end of the cycle from the output of the pickup unit 2 during the time of action of the output signal of the driver 8 of the start-stop cycle, the signal from the falling edge of this signal (the output signal of the first differentiating element 9) passes through the AND 13 element and the OR 15 element as an Error signal. If a start-stop cycle generator 8 starts up more than one end of cycle signal, the second and subsequent end-of-cycle signals pass through AND 12 as an error signal, since the additional trigger 1I from the first end signal of the cycle goes to enable 12 state (from the signal delayed by the delay line 14 for the time of action of the first signal of the end of the cycle). The code combination at the output of the integrating unit 3 is checked using parity code checker 17 for evenness (oddness). When reading the received combination from the receiver-dialer unit 2, the parallel code checker 16 again checks the parity (oddness) for evenness. The results of both checks arrive at comparison unit 18. In the presence of

errors at the time of reading the received combination from the receiver-dialing unit 2 caused by failures or failures of the receiver units, the results of checks of the serial and parallel codes are different and the signal for the end of the start-stop cycle from the output of the receiver-dialing unit 2 passes through the comparison unit 18, the OR 15 element as a signal Error. With the receiver functioning correctly and there are no failures in its operation, the results of both checks coincide and the signal of the end of the start-stop cycle from the output of the receiver-dialer unit 2 through the comparison block 18, the OR 15 element as an error signal will not come out.

The technical and economic efficiency of the use of the proposed receiver of a telegraph apparatus with automatic control is to increase the likelihood of received information, as well as to reduce the number of service personnel.

Claims (1)

Invention Formula Telegraph receiver with automatic control by auth.St. No. 585623, characterized in that, in order to increase the validity of the received information, a parallel code checker and a series-connected checker are entered the serial code and the comparison unit, the output of which is connected to the additional input of the OR element, the second and third inputs of the comparison unit are respectively connected with the output of the parallel code checker and with the input of an additional trigger, and the input of the sequential code checker is connected to the input of the start-stop loop generator. Sources of information taken into account in the examination I. USSR Copyright Certificate №585623, cl. H 04 L 7/16, 1976 (prototype).