SU842822A1 - Device for testing digital units - Google Patents

Description

(54) A DEVICE FOR CONTROL OF DIGITAL KNOTS compared to the outputs of the controlled node, and the fourth output of the command form is connected to the second input of the ryo register, serially connected pulse generator, counter, decoder, digital-analogue converter and key block are entered, the second inputs of which are connected to the switch outputs, and the outputs to the inputs of the monitored node and to the third inputs of the comparison unit, the output of which is connected to the third input of the first register, the fourth input of which is connected to the second output of the memory block five, fifth out formirova bodies connected with the input commands gene pulse generator and the decoder outputs - to the third inputs of the indication unit. The drawing shows the device block diagram. It contains an input block 1, a memory block 2, a comparison block 3, a control block 4, a second register 5 / switch 6, a key block 7, an indication block 8, a counter 9, a decoder 10, a digital-analog converter 11 and a pulse generator 12 controlled by The node 13 .. The control unit 4 consists of the control unit 14 of the control of the first register 15 and the former 16 commands. The device works as follows. The control modes of the node 13 are set on the control panel 14. After starting the device, setting all the units of the device to the initial state, the control unit 4 organizes a rewrite of test information and information about the external contacts of the tested node either directly but from the typing field of the input unit 1, or from the external media via the input unit 1, respectively, into the memory unit 2 and into the register 5. The test information consists of a sequence of elementary tests, the width of which is equal to the number of external contacts of the node 13. After completing the entry of the information days, block 4 organizes sequential reading Elementary tests from memory block 2 to the inputs of the 3-compare block and switch b. In this case, using information about the external contacts of the monitored node 13, stored on the second register 5, only that elementary test passes through the switch b to the key block 7, which relates to the input contacts of the monitored node. The number of keys in block 7 corresponds to the maximum possible number of input contacts of the controlled node 13 (in their variety). The unit c and d), the {key from the corresponding register bit 5, controls the key in such a way that the output of the digital-to-analog converter 11 corresponding to the unit one is connected to the output of the key of the controlled node 13y. signal level. Similarly, with a zero signal from the register bit 5 on. the key output is connected to the output of a digital-to-analog converter 11, corresponding to a zero signal. The signals that are fed to the input contacts of the monitored node 13, as well as the signals that then appear on the OUTPUT contacts, go to the inputs of the comparison unit 3, where they are compared with the elementary test information read from the memory unit 2. In the full comparison, the reading of the next elementary test information from the memory 2 is allowed, etc. In case of non-comparison, the operation of the device stops and the display unit 8 displays the number of this elementary test and the number of contacts on which the non-comparison occurred. The mode in which the operation of the node is checked when the voltage levels of the signals and the frequency in the allowable ranges change, as well as with specially exceeded, is set on the control panel 14. After reading the information from the next elementary test from block 2, a command from the command generator 16 starts the pulse generator 12 and pulses start to flow to the input of the counter 9, the first of which at the outputs of the digital-to-analog converter 11 will set the voltage levels that meet the minimum O signal level values. With each successive pulse, these levels will change by some constant value and with some filling of the counter 9 there will be square meters corresponding to the maximum possible levels of O signals. The maximum and minimum levels before checking are set using the controls of the digital-to-analog converter 1. At the time of not comparing with block 3 of the comparison, a signal arrives at the first register 15, as a result of which the pulse generator 12 stops and the values of levels IIQII will be displayed J, tijii signals. The use of the device will significantly improve the quality of control of digital nodes, and due to this, the reliability of their work in the future. Form na. of the invention. A device for controlling digital nodes comprising

connected control panel, first register, command driver, input unit, memory unit, comparison unit and display unit, the second input of which is connected to the second output of the command unit, the third output of which is connected to the second input of the memory unit connected to the first outputs the first inputs of the switch, the second inputs of which through the second register are connected to the first outputs of the input unit connected by the second output to the second input of the first register, the second inputs of the comparison unit are connected to the outputs of the controlled y evil, and the fourth output of the forms (; the command rover is connected to the second input of the second register, which is so that, in order to increase the reliability of the control results, serially connected

pulse generator, counter, descrambler, electronic analog converter and key block, the second inputs of which are connected to the switch outputs, and the outputs - to the input of the monitored node and to the third inputs of the comparison unit, the output of which is connected to the third input of the first register, the fourth input of which is connected to the second the output of the memory unit, the fifth output of the command driver is connected to the input of the pulse generator, and the outputs of the decoder are connected to the third inputs of the display unit.

Information sources,

5 taken into account in the examination

1. The author's certificate of the USSR I 605216, cl. G 06 F 11/00, 1976.

2. Authors certificate of the USSR 498816, cl. G 06-F 11/00, 1973 (prototype).

Claims (1)

Claim A device for monitoring digital nodes, containing in series. 842822 connected control panel, first register, command generator, input unit, memory unit, comparison unit and display unit, the second input of which is connected to the second output of the command generator, the third output of which is connected to the second input of the memory unit connected by the first outputs to the first the inputs of the switch, the second inputs of which through the second register are connected to the first outputs of the input unit connected to the second input of the first register by the second ** output, the second inputs of the comparison unit are connected to the outputs th node, and a fourth output connected to the command generator 15 rum secondary input of the second register, and exc h a. In addition, in order to increase the reliability of the control results, a pulse generator, a counter, a decoder, a digital-to-analog converter, and a key block are introduced into the device, the second inputs of which are connected to the outputs of the switch, and the outputs to the inputs of the controlled node and to the third inputs of the comparison unit, the output of which is connected to the third <input of the first register, the fourth input of which is connected to the second output of the memory unit, the fifth output of the command generator is connected to the input of the pulse generator c, and the outputs of the decoder are with the 'third inputs of the display unit.