RU2103819C1 - Device which tests conditions of communication networks - Google Patents

Abstract

FIELD: radio engineering, in particular, communication testing equipment. SUBSTANCE: device has system to be tested (including transmission channel 1, receiving channel 2, automatic communication equipment 3, controlled attenuator 4), random sequence generator 5, error detector 6, counter 7, clock oscillator 8, gate 9, wide-band noise oscillator 10, tuned rejection filter 11, unit 12 which controls tuned rejection filter, adders 13, 14. Wide-band noise oscillator 10 and tuned rejection filter 11 are used for generation of noise and bandwidth at input of communication system for total frequency range of system. Said bandwidth is optimal for transmission and alters its position on frequency axis. Communication system tuning is tested by random sequence. Technical condition of system is detected using error rate. EFFECT: possibility to assess technical condition of communication systems which operate in frequency-adaptation mode by means of simulation of noise at system input. 15 dwg

Description

 The invention relates to the field of radio engineering, and in particular to the field of monitoring the technical condition of communication systems, and in particular, the claimed device for diagnosing the state of communication systems is intended to increase the reliability of diagnosis of communication systems operating in frequency-adaptive modes (CHAR).

 Known diagnostic devices, see the invention, "Device for monitoring the health of the radio." (51) 4 H 04 B 17/00, published 02.22.90, issue N 134; invention "Device for diagnosing the state of equipment of digital transmission systems" (51) 5 HO 4 B 3/46, published 05/15/97, Bulletin No. 18. They contain devices for generating a pseudorandom sequence (PSP), a device for comparing test sequences, and an error counter. These devices allow you to diagnose communication systems by the error rate.

 A common disadvantage of analogues is the lack of the ability to diagnose automated communication systems when working in the Char work.

 Of the known devices, the closest to the claimed device (prototype) from its technical essence is the well-known diagnostic device based on the measurement of the error coefficient (described in the book: Metrology, standardization and measurements in communication technology / Edited by V.P. Khromogo M .: Radio and Communications, 1986, pp. 327-329, Fig. 11.25). The prototype device consists of a clock generator, SRP generators, an error detector, keys, an error counter, a clock counter, a trigger, a clock selector.

 In this case, the output of the clock generator 1 is connected to the input of the PSP 1 generator, the output of which is to the input of the communication system, the output of which is to the inputs of the error detector and the clock isolator, whose output is to the inputs of the PSP 2 generator and key 2, whose output is to the input of the clock counter, output which to the trigger input, whose output is parallel to the inputs of key 2 and key 1, whose input is to the output of the error detector, and the output of key 1 is to the input of the error counter.

 This device is optimal because it allows you to diagnose communication systems by measuring the error rate when passing the test memory bandwidth through a controlled system.

 This device does not provide sufficient reliability of diagnosis due to the limitation of the measurement time, and it does not take into account the algorithms for the adjustment of automated communication systems with frequency-adaptive operating modes.

 The aim of the present invention is to develop a device for diagnosing the state of communication systems, providing increased reliability of the diagnosis of automated communication systems operating in frequency-adaptive modes of operation.

 This goal is achieved by the fact that in the known diagnostic device based on the measurement of the error coefficient, containing a clock, a memory generator, an error detector, a counter, a key, a communication system represented by a transmission path, a reception path, automated communication equipment (ABC) controlled by an attenuator . In this case, the first output of the PSP generator is connected to the low-frequency (LF) input of the transmission path, the high-frequency (HF) output of which is connected to the "PRD" input of the controlled attenuator. The control inputs of the restructuring of the transmission and reception paths are connected respectively to the first and second control outputs of the ABC equipment, the information input of which is connected to the intermediate frequency (IF) output of the reception path. The second input of the error detector is connected to the low-frequency output of the receive path. The second output of the SRP generator is connected to the first input of the error detector, the output of which is connected to the second input of the counter, the first input of which and the SRP generator input are connected in parallel to the output of the clock generator, the input of which is connected to the key output, the inputs of which are connected to the outputs of the counter. Additionally, the following elements were introduced: a broadband noise generator, a tunable obstruction filter, a tunable obstruction filter control device (UPZF), the first and second adders. The RF input of the receiving path is connected to the output of the second adder. The first input of which is connected to the output of "PFP" controlled attenuator. The first and second outputs of the broadband noise generator are connected respectively to the second input of the first adder and the third input of the tunable obstruction filter. The first and second input of which are connected respectively to the first and second output of the UPZF device. The output of the tunable barrier filter is connected to the first input of the first adder. The output of which is connected to the second input of the second adder. The first control inputs of the first, second adders controlled by the attenuator are combined and connected to the first output contact of the switch B1 "Adaptation". The second inputs are likewise combined and connected to the second output terminal of switch B1. The input terminal of which is connected to the power input.

 The proposed device allows you to check the adjustment algorithm of automated communication systems with the CHAR, while increasing the reliability and reducing the time of diagnosis, by adjusting the signal-to-noise ratio at the input of the communication system, simulating the interference environment.

In FIG. 1 shows a structural diagram of the claimed device for diagnosing the state of communication systems;
in FIG. 2 is a block diagram of a transmission path;
in FIG. 3 is a block diagram of a reception path;
in FIG. 4 is a structural diagram of ABC equipment;
in FIG. 5 is a structural diagram of a controlled attenuator;
in FIG. 6 is a variant of the structural diagram of the PSP generator;
in FIG. 7 is a variant of a structural diagram of an error detector;
in FIG. 8 is a variant of the structural diagram of the counter;
in FIG. 9 is an embodiment of a block diagram of a clock;
in FIG. 10 is an embodiment of a key block diagram;
in FIG. 11 is a variant of the structural and circuit diagrams of a broadband noise generator;
in FIG. 12 is a variant of the structural and circuit diagrams of a tunable obstruction filter;
in FIG. 13 is a variant of the structural diagram of the device UPZF;
in FIG. 14 is a variant of the structural and circuit diagrams of the first and second adders;
in FIG. 15 are graphs for evaluating the effectiveness of the claimed device.

 The device for diagnosing the state of communication systems shown in FIG. 1, includes a transmission path 1, a reception path 2, ABC equipment 3, a controlled attenuator 4, an SRP generator 5, an error detector 6, a counter 7, a clock generator 8, a key 9, a broadband noise generator 10, a tunable barrage filter 11, an UPZF device 12 , first 13 and second 14 adders. The “RF” output of transmission path 1 is connected to the “PRD” input of the controlled attenuator 3. The control inputs of the transmission paths 1 and 2 are connected respectively to the first and second control outputs of the ABC 3 equipment, the information input of which is connected to the “IF” output of reception path 2. The first output of the SRP 5 generator is connected to the low-frequency input of the transmission path 1. The second input of the error detector 6 is connected to the "LF" output of the transmission path 2. The second output of the SRP 5 generator is connected to the first input of the counter 7. The first input of which and the SRP 5 generator input are parallel connect s to the output of the clock generator 8, the input of which is connected to the output of the key 9, the inputs of which are connected to the outputs of the counter 7. The "HF" input of the receive path 2 is connected to the output of the second adder 14. The first input of which is connected to the output "PFP" of the controlled attenuator 4. The first and second outputs of the broadband noise generator 10 are connected respectively to the second input of the first adder 13 and the third input of the tunable obstruction filter 11. The first and second input of which are connected respectively to the first and second outputs of the UPZF device 12 The output of the tunable obstruction filter 11 is connected to the first input of the first adder 13. The output of which is connected to the second input of the second adder 14. The first control inputs of the first 13, second 14 adders, controlled attenuator 4 are combined and connected to the first output terminal of the adaptation switch B1. The second inputs are likewise combined and connected to the second output terminal of switch B1. The input terminal of which is connected to the power input.

 For the inventive device, it is fundamentally not important to disclose the structure of an automated communication system with the Char, which is already known (see Military Radio Communication Systems / Edited by V.V. Ignatov, Leningrad VAS, 1989, pp. 125-128 Fig. 5.1, 5.3; p. 160 fig. 5.13; p. 259 fig. 6.1; pp. 291-299 fig. 7.1, 7.2). A general view of the elements of a communication system, as an option, is shown in FIG. 2, FIG. 3, FIG. 4, FIG. 5.

 Transmission path 1, shown in FIG. 2 as an element of an automated communication system with CHAR, includes: matching antenna device 1.1 (ACS), power amplifier 1.2 (PA), pathogen 1.3, automatic tuning system 1.4. The RF output of the communication system is the output of self-propelled guns 1.1, the input of which is connected to the output of the PA 1.2, the input of which is connected to the output of the exciter 1.3, the input of which is the "LF" input of the communication system. The control inputs of the adjustment of self-propelled guns 1.1, UM 1.2, pathogen 1.3 are connected to the corresponding outputs of the automatic tuning system 1.4, to the controlled input of which external automation devices are connected.

 The reception path 2, shown in FIG. 3 as an element of an automated communication system with the CHAR, includes: self-propelled guns 2.1, an intermediate frequency path (IF) 2.2, a private receive path 2.3, a synthesizer 2.4, an automatic tuning system 2.5. The “HF” output of the communication system is the output of self-propelled guns 2.1, the input of which is connected to the output of the IF 2.2 path, whose input is to the output of the private 2.3 receive path, the input of which is the LF input of the communication system. The tuning inputs of the IF 2.2 path are connected to the corresponding outputs of the frequency synthesizer 2.4. The control inputs of the tuning of self-propelled guns 2.1, the receiving frequency path 2.3, synthesizer 2.4 are connected to the corresponding outputs of the automatic tuning system 2.5, to the controlled input of which external automation devices are connected. The second output of the IF path 2.4 is the “IF” output of receive path 2.

 The ABC 3 equipment shown in Fig. 4 as an element of an automated communication system with the CHAR includes: an analysis device 3.1, a device for generating and processing commands 3.2, and a control device 3.3. The information input of the ABC 3 equipment is the input of the analysis device 3.1, the output of which is connected to the control device 3.3, the command input and output of which is connected to the corresponding input and output of the device for generating and processing commands 3.2. The control outputs of the control device 3.3 are the control outputs 1 and 2 of the ABC equipment.

 The controlled attenuator 5, as an element of an automated communication system, can structurally be part of the receiving path 2 and (or) a separate element (antenna equivalent). If it is not part of the system, then it can be performed according to the circuit shown in FIG. 5 and includes a switch DD4.1, the first 4.2 and the second 4.3 attenuators. The input "PRD" is the input of the first 4.2 attenuator. The output of which is connected in parallel to the first and second inputs of the DD4.1 switch. The third input of which is the output of the second attenuator DD4.1. To the first and third output of which the input "PFP" is connected in parallel. The input "Exercise 1" is connected to the input V1 of the switch DD4.1. To the inputs V2 and V3 of which the input "Exercise 2" is connected in parallel. Attenuators 4.2 and 4.3 are known devices (see MRB N 1147, Reference book of a radio amateur designer, M., Radio and Communications, 1990, p. 600 Fig. 13.11). Switch DD4.1 known device (chip type K561KT).

The PSP generator is a known device (see MRB N 1125, Elements of the REU, M., Radio and communications, 1988, p. 134 Fig. 10.11). Designed to form a test pseudo-random sequence. Alternatively, it can be performed according to the circuit shown in FIG. 6. Includes shift registers DD5.1, DD5.3 (type K561IR2), OR-NOT DD5.2 element (type K651LP2). The input from block 8 is connected to the clock inputs of the shift registers DD5.1, DD5.3. The output Q _{3 of the} first register DD5.1 is connected to the data input D of the second register DD5.3. Free outputs Q ₁ , Q ₃ connected to the inputs of the chip AND NOT DD5.2. The output of which is connected to the data input D of the first shift register DD5.1. The output Q _{4 of the} second shift register DD5.3 is the output to blocks 1 and 6.

 The error detector is a known device (see MRB N 1125, Elements of the REU, M., Radio and communications, 1988, pp. 93-95 Fig. 6.1-6.10). Designed to highlight errors when comparing two memory bandwidths. Alternatively, it can be performed according to the circuit shown in FIG. 7. It consists of series-connected elements OR-NOT DD6.1, DD6.2 (type K561LP2). The differential system R1, C1 is connected to the output of the first DD6.1 microcircuit, by selecting the capacitor C1, the delay of the SRP from block 2 is taken into account.

Счетчик тактов включает последовательно соединенные счетчики DD7.1.1 - DD7.1.5. При этом выходы переноса C_вых подключены к тактовым входам. Управление осуществляется от блока 8 по тактовому входу первого счетчика DD7.1.1. Выход Q₄ счетчика DD7.1.5 является выходом к блоку 9. Входы сброса данных R запараллелены и являются выходом к блоку 9. Счетчик ошибок включает последовательно соединенные счетчики DD7.2.1 - DD7.2.5, к выходам которых подключены дешифраторы DD7.2.11-DD7.2.15 с индикаторами DD7.2.21-DD7.2.25. Для обеспечения десятичного счета микросхем DD7.2.1-DD7.2.5 введены цепи обратной связи с сбросом на десятом импульсе к выходам Q₂, Q₄ счетчиков DD7.2.1 - DD7.2.5 подключены микросхемы И-НЕ DD7.2.16 - DD7.2.20. Выходы которых подключены к первым входам микросхем И-НЕ DD7.2.6 - DD7.2.10. Вторые входы которых запараллелены и являются выходом к блоку 9. Выходы микросхем И-НЕ DD7.2.6-DD7.2.10 подключены к входам сброса данных счетчиков DD7.2.1-DD7.2.5. Счетчики DD7.1.1-DD7.1.4 микросхемы типа К561ИЕ8, DD7.1.5; DD7.2.1-DD7.2.5 микросхемы типа К561ИЕ10, микросхемы И-НЕ DD7.2.6-DD7.2.10; DD7.2.16-DD7.2.20 типа К561ЛА7; дешифраторы DD7.2.11-DD7.2.15 типа К561ИД1; индикаторы DD7.2.21-DD7.2.25 типа АЛС324.The counter is a known device (see the Handbook of Integrated Circuits, M., Energy, 1980, under the editorship of VV Tarabrin, p. 690-718 Fig. 5.166 - 5.219, p. 622-626 Fig. 5.86 - 5.90) . Designed to count pulses from a clock generator and control errors detected by the error detector. Alternatively, it can be performed according to the circuit shown in FIG. 8. It includes a 7.1 cycle counter (for 160,000 cycles), an error counter 7.2. (up to 99,999 errors). This construction allows you to determine the error coefficient P _OSH :

The cycle counter includes series-connected counters DD7.1.1 - DD7.1.5. In this case, the transfer outputs C _{o are} connected to the clock inputs. Management is carried out from block 8 at the clock input of the first counter DD7.1.1. The output Q _{4 of the} counter DD7.1.5 is the output to block 9. The data reset inputs R are parallel and are the output to block 9. The error counter includes series-connected counters DD7.2.1 - DD7.2.5, to the outputs of which the decoders DD7.2.11-DD7 are connected. 2.15 with indicators DD7.2.21-DD7.2.25. To ensure decimal counting of DD7.2.1-DD7.2.5 microcircuits, feedback circuits were introduced with a reset on the tenth pulse to the outputs Q ₂ , Q _{4 of the} counters DD7.2.1 - DD7.2.5 the AND-NOT DD7.2.16 - DD7.2.20 microcircuits were connected. The outputs of which are connected to the first inputs of the NAND chips DD7.2.6 - DD7.2.10. The second inputs of which are parallelized and are the output to block 9. The outputs of the NAND chips DD7.2.6-DD7.2.10 are connected to the data reset inputs of the DD7.2.1-DD7.2.5 counters. Counters DD7.1.1-DD7.1.4 microcircuit type K561IE8, DD7.1.5; DD7.2.1-DD7.2.5 microcircuit type K561IE10, microcircuit AND-NOT DD7.2.6-DD7.2.10; DD7.2.16-DD7.2.20 type K561LA7; decoders DD7.2.11-DD7.2.15 type K561ID1; indicators DD7.2.21-DD7.2.25 type ALS324.

 The clock generator is designed to generate control clock pulses. Presented in FIG. 9 and includes the first and second pulse generators 8.1 and 8.2. with fixed generation frequencies, switch 8.3, switch B2 (pulse generator selection). Pulse generators 8.1 and 8.2 known devices. Done identically. (see. Reference on integrated circuits, M., Energy, 1980, under the editorship of VV Tarabrin, p. 588, Fig. 5.35; 5.36). Alternatively, they can be performed on series-connected AND-NOT microcircuits DD8.1.1 (DD8.2.1) - DD8.1.2 (DD8.2.2) of type K561LA7. The generation frequency is determined by the resistance R1. Switch DD8.3 known device (see chip type K561KT1). The outputs of pulse generators 8.1, 8.2 are connected to the inputs of the switch, DD8.3 the outputs of which are parallel and are outputs to blocks 5 and 7. The control inputs of the switch DD8.3 are connected to the output contacts of switch B2, the input of which is the input from block 9.

 The key is designed to connect control pulses. Presented in FIG. 10. It can be performed on a NAND DD9.1 chip (type K561LA7). In this case, “Vkh.2” is connected to the inputs of the AND-NOT chip, the output of which is the output to block 8. “Vkh1” is connected to the housing through the first contacts of the KH1 “Reset” button. Input N 3 is connected to the plus of the power source through the second contacts of the KH1 "Reset" button.

 A broadband noise generator allows you to receive a noise signal in the frequency band of the communication system. Shown in figure 11. The master oscillator 10.1 (see MRB N 1125. Elements of the REU. M., publishing house Radio and Communications, 1988, pp. 106 - 107, Fig. 7.23, in which the noise source is the diode VD1, the signal from which is fed to a two-stage amplifier) . Amplification cascade 10.2 in the form of an operational amplifier (see microcircuits of type 228UV1 - 228UV4 Integrated circuits reference book, M., Energy, 1980, edited by V.V. Tarabrin p. 451). AGC system 10.3. Which provides the normal distribution law, thereby expanding the range of operation of the noise generator in the high frequency region, is collected on a field-effect transistor. Matching circuit 10.4 in the form of a voltage divider for resistances. The output of the master noise generator 10.1 is connected to the input of the amplifier 10.2. The output of which is connected to the matching circuit 10.4 and the input of the AGC system 10.3, the output of which controls the master noise generator 10.1 by the output voltage. The outputs of the matching circuit 10.4 are outputs to blocks 11 and 13.

 A tunable obstruction filter suppresses the selected frequency band. Shown in Fig.12 is a known device and can be made in the form of an L-shaped LC blocking filter 11.1. The filter is tuned along the control voltage input circuits 11.2 (configurable elements such as the KVS111A varicap matrix, see MRB, Reference book of the radio amateur designer, M., Radio and Communications, 1990, Issue 1147, pp. 23-24, Fig. 1.22 ( and, k), p. 42 Fig. 2.11).

 The PEF control device shown in Fig. 13 is a known device and can be made in the form of a step voltage generator (see MRB, Reference book of a radio amateur designer, M., Radio and communication, 1990, issue 1147, p. 75, Fig. 75 ) Designed for the formation of control voltages. It includes a pulse generator 12.1, a pulse counter 12.2, the first 12.3 and second 12.4 resistor matrices, the first DA12.5 and second DA12.6 operational amplifiers. The output of the pulse generator 12.1 is connected to the input of the pulse counter 12.2. The outputs of which are connected in parallel to the inputs of the first 12.3 and second 12.4 resistor matrices. The outputs of which are connected, respectively, operational amplifiers DA12.5, DA12.6, covered by negative feedback. As a result, two step voltage generation circuits are provided. The levels of which will be determined by the resistances commutated in the resistor matrices and the parameters of the amplifiers, and the step of following the frequency of the pulse generator is 12.1.

 The first 13 and second 14 adders shown in FIG. 14 known devices. They are performed identically (see МРБ N 1125, Elements of РЭУ, М., Radio and communication, 1988, p. 57 of Fig. 2.15) in addition to the function of combining the input signals, they provide adjustment of the output level due to the selection of resistances R2, R6.

Требуемый уровень на выходе устройства коммутируется за счет коммутатора DD13.1 (DD14.1) (типа К561КТ1), который управляется через переключатель В1 "Адаптация".

The required level at the output of the device is switched by the switch DD13.1 (DD14.1) (type K561KT1), which is controlled via switch B1 "Adaptation".

 The device operates as follows.

 In accordance with the fact that the communication system with an adaptive mode of operation, including transmission path 1, reception path 2, and automated communication equipment 3, changes the tuning frequency and selects the optimal one taking into account the interference situation, at the input of the communication system due to the broadband noise generator 10, it is simulated interfering environment in the entire range from which the tunable barrage filter 11 cuts the frequency band. The ABC 3 equipment should analyze the interference environment, find the “cut out” (suitable for communication) frequency band and rebuild the communication system within this band.

 Due to the control unit PEF 12 there is a change in the frequency band suitable for communication. The ABC 3 equipment will repeat the process of restructuring the communication system within the new band.

где
N_общ - 160 000 импульсов
Если количество искаженных импульсов не превышает допустимого значения, то принимается решение о работоспособности аппаратуры адаптивных систем связи. Высвечивается количество искаженных импульсов, отражающее техническое состояние адаптивной системы связи.The correctness of the tuning is determined by the quality of communication by measuring the number of incorrectly received pulses controlled by the error detector 6 and counter 7 at a set time interval. In this case, the requirement for the error rate must be met:

Where
N _total - 160,000 pulses
If the number of distorted pulses does not exceed the permissible value, then a decision is made on the operability of the equipment of adaptive communication systems. The number of distorted pulses is displayed, reflecting the technical condition of the adaptive communication system.

 If the number of distorted pulses exceeds the permissible value, a conclusion is made about the inoperability of the equipment.

 The device operates according to the following algorithm.

With the beginning of the diagnosis from the first output of the broadband noise generator 10, a signal in the form of noise is fed to the third input of the tunable blocking filter 11. At the same time, one of the ith control voltage levels is applied to the first and second inputs from the output of the PEF 12 control device. At the output of the tunable obstruction filter 11, a noise signal is generated, in the frequency range of the communication system, with a “cut out” band MF _bni , which is fed to the second input of the first 13 adder, from the output of which to the second input of the second 14 adder, from the output of which to the path input reception 2. This information is fed to the ABC 3 equipment, which rearranges the transmission paths 1 and reception 2 in the limits of the MF _bni band. When the following i + 1 levels of control voltages appear at the output of the UPZF 12 device, changing the position of the "cut" strip MA _{bni + 1} , the ABC 3 equipment will rebuild the transmission and reception paths 1 within the new frequency band. This tuning cycle will be repeated at all frequencies. The correctness of the tuning is determined by the quality of passing the test sequence along the circuit: the output of the SRP 5 generator, the input of the transmission path 1, the input of the control gear of the controlled attenuator 4, from the output of the PFM to the first input of the second adder 14, from the output of which to the input of the reception path 2, the output of which is connected the input of the error detector 6. Simultaneously with the second output of the broadband noise generator 10, the signal is fed to the first input of the first adder 13, to provide the desired signal-to-noise ratio at the input of the receiving path 2.

In the error detector, incorrectly received pulses are detected, which are recorded by the counter _Nsh and compared with N _add .

When N _Osh <N _additional conclusion is made about the health of the adaptive communication system. The end of the work.

When _Nsh > N, the _additional “Adaptation” switch is put into the “OFF” position and the ABC equipment is turned off (adaptive mode is turned off). The control voltage is supplied to the first 13, second 14 adders, a controlled attenuator 4. At the same time, the ABC 3 equipment is disconnected from the transmission path 1 and reception 2 and coordination is ensured by the level of switched blocks.

 The test sequence starts.

делается вывод о неисправности аппаратуры АВС. Конец работы.If a

a conclusion is made about the malfunction of the ABC equipment. The end of the work.

делается вывод о неисправности трактов передачи 1 и приема 2. Конец работы.If a

a conclusion is made about the malfunction of transmission paths 1 and reception 2. End of work.

. Для того, чтобы оценить вероятность ошибки по коэффициенту ошибки имеется формула (см. Е.С. Венцель, Теория вероятности и ее инженерное приложение, М., изд. Наука, 1988 г, стр. 463, ф-ла 11.8.5).When evaluating the effectiveness of the claimed technical solution, one of the determining ones is the requirement for the reliability of measuring the error coefficient

. In order to evaluate the probability of error by the error coefficient, there is a formula (see ES Wenzel, Probability Theory and its Engineering Appendix, M., ed. Nauka, 1988, p. 463, file 11.8.5).

где
Ф - функция Лапласа;
ε - величина доверительного интервала;
N - количество импульсов.

Where
Ф - Laplace function;
ε is the value of the confidence interval;
N is the number of pulses.

В предлагаемом устройстве за счет введения широкополосного генератора шума 10, на входе приемника снижается соотношение сигнал-шум (h $\genfrac{}{}{0ex}{}{\text{2}}{\text{o}}$ ) . Шумовой сигнал вводится по цепи: второй выход широкополосного генератора шума 10 подключен к второму входу первого сумматора 13, выход которого к второму входу второго сумматора 14, выход которого к "ВЧ" входу тракта приема 2. Согласно справочных данных (см. Военные системы радиосвязи/ Под ред. В.В. Игнатова, Ленинград ВАС, 1989 г, стр. 39-40 табл. 2.2; 2.3, результаты расчетов представлены в виде графиков на фиг. 15), при снижении h $\genfrac{}{}{0ex}{}{\text{2}}{\text{o}}$ (h²) искусственно увеличивается коэффициент ошибок до p $\genfrac{}{}{0ex}{}{\text{*}}{\text{ош}}$ = 3•10^-1.Calculations show that for: ε = 0.01 • p $\genfrac{}{}{0ex}{}{\text{*}}{\text{osh}}$ ; N = 160,000;

In the proposed device due to the introduction of a broadband noise generator 10, the signal-to-noise ratio (h $\genfrac{}{}{0ex}{}{\text{2}}{\text{o}}$ ) The noise signal is introduced through the circuit: the second output of the broadband noise generator 10 is connected to the second input of the first adder 13, the output of which is to the second input of the second adder 14, the output of which is to the “RF” input of the reception path 2. According to the reference data (see Military radio communication systems / Edited by V.V. Ignatov, Leningrad EAC, 1989, pp. 39-40, Table 2.2; 2.3, the calculation results are presented in the form of graphs in Fig. 15), with a decrease in h $\genfrac{}{}{0ex}{}{\text{2}}{\text{o}}$ (h ² ) artificially increases the error rate to p $\genfrac{}{}{0ex}{}{\text{*}}{\text{osh}}$ = 3 • 10 ^-1 .

Разделив (1.7) на (1.6), получим выигрыш по достоверности измерения:

Время измерения при скорости 1200 бит/с. - 2,2 мин.The reliability of the measurements will be equal to:

Dividing (1.7) by (1.6), we obtain a gain in the reliability of the measurement:

Measurement time at a speed of 1200 bps. - 2.2 minutes

 Thus, the proposed device allows you to diagnose automated communication systems while increasing the reliability of the measurement.

Claims (1)

 A diagnostic device for the state of communication systems containing a transmission path, a reception path, automated communication equipment, a controlled attenuator, a pseudo-random sequence generator, an error detector, a counter, a clock generator, a key, while the control inputs of the transmission and reception paths are connected respectively to the first and second control the outputs of the automated communication equipment, the information input of which is connected to the output of the intermediate frequency of the reception path, the high-frequency output of the path the driver is connected to the input of the controlled attenuator, the first output of the pseudo-random sequence generator is connected to the low-frequency input of the transmission path, the second input of the error detector is connected to the low-frequency output of the reception path, the second output of the pseudo-random sequence generator is connected to the first input of the error detector, the output of which is connected to the second input of the counter, the first input of which and the input of the pseudo-random sequence generator in parallel are connected to the output of the clock generator, the input of which connected to the output of the key, the inputs of which are connected to the outputs of the counter, characterized in that it additionally introduced a broadband noise generator, tunable obstruction filter, control device tunable obstruction filter, the first and second adders, switch "Adaptation", while the high-frequency input of the reception path is connected to the output of the second adder, the first input of which is connected to the output of the controlled attenuator, the second and first outputs of the broadband noise generator are connected respectively to to the first input of the first adder and the third input of the tunable obstruction filter, the first and second inputs of which are connected respectively to the first and second outputs of the tunable obstruction filter control device, the output of the tunable obstruction filter is connected to the first input of the first adder, the output of which is connected to the second input of the second adder, the first the control inputs of the first, second adders controlled by the attenuator are combined and connected to the first output contact switch I "Adaptation", the second output terminal of which is connected to the second control inputs of the data devices connected to the control input of the switch.

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