SU1522269A2 - Device for monitoring signal transmission systems - Google Patents

Abstract

The invention relates to computing and can be used to find the point of failure in the communication line between digital computing devices. The purpose of the invention is to improve the accuracy of the device - achieved by introducing the elements of the OR and the switch, as a result of which the device detects not only "stable 1" but also "stable 0". 2 Il.

Description

The invention relates to a computer technology for transmitting information and can be used to find the point of failure in a communication line between digital computing devices and is an improvement of the technical solution by author. Eve about № 711610.

The purpose of the invention is to increase the accuracy of the device.

Figure 1 shows the structural diagram of the device; figure 2 - one of the options cxej-tt. switch.

A device for monitoring signal transmission systems contains a transmitting digital computing unit |, a multichannel communication line 2, a receiving digital computing unit 3, channel amplifiers 4 ,, 1 „1-4, p, n, elements And 5.1-5, p , shift register 6, consisting of 6.1-6оП cells, bus 7 reception pulses, bus 8 shift pulses, OR elements 9.1-9. n switches 10.1-10. n, each of which consists of trigger 11, elements AND, element OR 14.

The device works in the following way.

In the operating mode, data from the transmitting unit 1 via the multichannel communication line 2 is fed to the receiving unit 3.

In monitoring mode, a fault is determined in the communication line. In the initial state, bits of the shift register 6 are in the zero state, the switches connected the outputs of the And 5 elements to the inputs of the corresponding cells of the shift register 6. To find out, for example, a fault that is stable, the 11 ... 11 is sent to the multi-channel line 2.

The failure of the second amplifier 4 in the first channel (at the output is stable O), when sending in line 2 combinations 11.0.11 at the output of this wuxi M

The signal, and, therefore, at the output of all subsequent amplifiers of this channel, will be signal O. This leads to the fact that the output of only the first element And 5, whose inputs are connected to the first amplifiers of all channels, appears signal 1, and only the first bit of shift register 6 is set to one. The remaining bits of shift register 6 remain in the zero state.

Signal 1 is fed to the receive pulse bus 7, which is fed both to the second inputs of the bits of the shift register 6 and to the third inputs of the switches (Fig 2). In this case, signals from the outputs of the switches 10 are written to the corresponding bits of the shift registers 6 on the leading edge of the pulse in bus 7, and on the falling edge of the same pulse, the switch switches to another position (in this case, the outputs of the OR 9 with inputs of the corresponding bits of shift registers 6).

After the reception pulse, a single pulse, which the code combination 100 ,, is transmitted to, is sent to bus 8. O recorded in shift register b is fed to the input of unit 3. Next, block 1 performs testing of channel amplifiers 4 of communication line 2 for failure 1, for which combination 00..00 is scattered in line 2. At the outputs of all channel amplifiers 4 will be a signal O, since the failure is stable 1 in this case is absent. The signals O from the outputs of the amplifiers 4 through the elements OR 9 (switch 10 with the last pulse of the belt 7 is set to the position at which the output of the element OR 9 is connected to the input of the corresponding cell of the shift register 6) are fed to the inputs of the corresponding register bits 6 o

0

five

Q 5

-

five

0

five

A single signal is supplied to bus 7, which is fed both to the second inputs of the shift register cells 6 and to the third inputs of the switches 10.

In this case, the signals from the outputs of the switches 10 are written to the corresponding bits of the shift register 6 on the leading edge of the pulse in bus 7, and on the falling edge of the same pulse, the switch 10 switches to another position (in this case, the outputs of the AND 5 elements are connected with the inputs of the corresponding bits of the shift register 6)

Thus, in the first case (when you put in line 2 of the combination 11.0.11), the amplifiers 4 are checked for failure, stable O, in the second case (when the 00 ... 00 combination is sent), the amplifiers are checked for failure. 1

I

Location and type of link failure

is determined by the received code combinations in the block

Claims (1)

Invention Formula Device for monitoring signal transmission systems according to aut. .sv. No. 711610, characterized in that, in order to increase the accuracy of the device, OR elements and switches are introduced into it, between the outputs of the corresponding 1x AND elements and the first inputs ™ of the shift register cells, the switches are connected to the first inputs and outputs, the second inputs of which are connected the outputs of the corresponding OR elements, the inputs of which are combined with the same inputs of the corresponding elements AND, the third inputs of the switches are combined with the second inputs of the corresponding cells of the shift register