SU1208545A1 - Device for diagnostic checking of television equipment - Google Patents

Abstract

The invention relates to telemechanics and can be used in the construction of television systems with built-in automated monitoring and diagnostics. The device contains primary converters, a switch, an ADC, a memory unit, a converter code - duration, counters, a display unit, a reference element, a fragment selection unit. The device allows to reliably determine the state of the tested equipment by selecting a fragment corresponding to a group of parameters in which one of the parameters exceeded the permissible value. 1 il. Off 00 01 4 SP

Description

The invention relates to telemechanics and can be used in the construction of television systems with built-in automated monitoring and diagnostics tools.

The aim of the invention is to improve the reliability of the device

The drawing shows a block diagram of a device for diagnosing television equipment.

The device contains primary: converters 1, switch 2, analog-to-digital converter 3, memory block 4, converter 5 code - duration, first counter to 6, indication block 7, counter 8, fragment selector block 9, element 1 About comparison .

The fragment selection unit 9 comprises a decoder 11, AND elements 12, an encoder 13, a code comparison element 14, and a PCR shaper 15.

The device works as follows.

The switch 2 commutes to the input of the analog-digital converter 3 and the first input of the voltage comparison element 10 from the primary converters 1 in accordance with the polling algorithm of control pulses coming from counter 8. The second input of the voltage element 10 compares the reference voltage, and the output of element 10, appearing in the event that the controlled voltage exceeds the permissible level, arrive at the activation of external signaling and at the first input of block 9 the selection of a fragment for determining the fragment number (a group of meters), in which the fault occurred, and the level of its priority. The signals from the output of switch 2, which are fed to the input of the analog-to-digital converter "w 3", are converted into parallel binary code and are fed to the input of memory block 4, where they can be stored in case of a recording signal from block fragment 9. If the write signal is not received, then the memory block 4 is in read mode. At the same time, the information recorded earlier appears at its output. Viewing the contents of memory block 4 is carried out synchronously with the scanning of the two-dimensional display block 7, due to the operation of the counter of 6 addresses clocked by sync pulses :. With you

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The progress of block 4 of the memory signals in the form of a binary code is given to the input of the converter 5; the code is the pulse duration, which converts the binary code into pulses, the beginning of which corresponds to the beginning of the line, and the duration is proportional to the number (in binary code). The signals from the output of the converter 5 code- - the pulse duration is fed to the input of the display unit 7 for display.

Block 9 fragment selection works as follows.

Signals from counter 8 arriving at the fifth input of fragment selection unit 9 are fed to decoder 11, where they are converted into a unitary code, which, if matched with a tolerance signal from the comparison element 10, is transmitted to elements 12 of the decoder 13 priority, where, in the case of the presence of an appropriate priority, it is remembered, and at the output of the decoder 13 a code is set that corresponds to a fragment (group of parameters) to which the parameter exceeds the allowed value. This code is applied to the code comparison element 14, at the output of which a signal appears in case of a code from the encoder 13 and the code from counter 8,

The code comparison element 14 may also operate in the mode of manually setting the fragment code. The signals from the output of the code comparison element 14 are input to the enable input of the recording signal generator 15 and enable the generation of recording signals. The frequency of the recording signals is determined by the synchronization frequency of 1x signals received by 1; and they are sent to the clock input of the shaper 15. The signals from the shaper 15 output are the output signals of the fragment selector 9 and control the operation mode of the memory 4, ensuring the recording and display of the necessary fragment .

Claims (1)

Invention Formula 1. A device for diagnosing television equipment, containing an indication unit and primary transducers, the outputs of which are connected to the corresponding input-.jH of the first group of switching inputs3 tori, the output of which is connected via an analog-to-digital converter to the first input of the memory block, characterized in that, in order to increase reliability, the first and second counters are entered into the device, the converter code is the duration, the comparison element and the fragment selection block, the switch output and The first input of the device is connected to the first and second inputs of the reference element, the output of which is connected to the output of the device and connected to the first input of the fragment selector, the output of which is connected to the second input of the memory block, the output of which C oedinen through the converter code - the duration of the first input unit. display, the second input of the device is connected to the second input of the fragment selection unit, the third and fourth inputs of which are connected to the third and fourth inputs of the device, the second and third inputs of the display unit and the first and second inputs of the first and second counters, respectively, the output of the second counter is connected to the second input comm 0885454 and the fifth input of the fragment selector, the output of the first counter is connected to the third input of the memory block. 52. The device according to claim 1, characterized in that the select fragment bds contains the elements AND, the encoder, the code comparison element, the writing signal generator 10 and the decoder, the outputs of which are connected to the first inputs of the corresponding elements And, the outputs of which are connected to the first inputs of the decoder, the output of which is connected 15 with the first input of the comparison code element, the output of which is connected to the first input of the signal conditioner records, combined second inputs of elements And, second input of element the code comparison, the second input of the decoder, the second input of the recording signal generator and the combined inputs of the decoder and the third input of the code comparison element are respectively the first, second, third, fourth and fifth inputs of the fragment selector, the output of which is the output of the recording signal generator.