SU1408535A1 - Device for functional monitoring of radio stations - Google Patents

Abstract

FIELD OF THE INVENTION The invention relates to radio and is an improvement to the invention in an. No. 1285607. The purpose of the invention is to increase the control. For this purpose, ten controlled switches, three AND elements, four OR elements, two counters, two keys, three voltage dividers, a timer, an audio frequency generator, a high frequency generator, a decoder are entered into the device. The operation of the device is based on the use of signals generated by the monitored radio station in the process of its operation as intended. At the same time, continuous monitoring of its performance is ensured. In the Receive mode, the control is performed during pauses of applied signals, which eliminates the ambiguity of the coefficient estimate. transmitting the high-frequency path at different levels of received signals due to the action of the AGC block. In this case, for control, the voltage from the output of the AGC unit is used, which in the pauses of the received signals is proportional to the level of the first receiver cascades passing through the high-frequency path. In this mode, the device self-monitoring is performed. In Transmit mode, the power amplifier is monitored for the level of the RF carrier signal. 1 ill., 1 tab. g (L

Description

14)

The invention relates to a radio communication technique, can be used to determine the operability of radio stations in the course of their operation, and is an improvement of the invention according to the author. St. No. 1285607.

The purpose of the invention is to increase the reliability of the control.

The drawing shows the structural electrical circuit of the proposed device.

The device for functional control of radio stations contains the first 1, second 2, third 3, fourth 4, fifth 5, sixth 6, seventh 7, eighth 8, nine nine and tenth 10 controlled switches, the first 11, second 12, third 13, quarter 14, fifth 15, sixth 16 and seventh 17 elements | OR, first 18, second 19 ,, third 20 1 and fourth 21 detectors, first 22, second 23 and third 24 HE, I first 25, second 26, the third 27, the fourth 28 and fifth fifth triggers, the first 30, second 31, third 32, fourth 33, fifth 34, sixth 35 and seventh 36 elements And, block 37 boxes

Levels, first 38, second 39 and third 40 voltage dividers, high frequency generator 41, audio frequency generator 2, first 43 and SECOND 4.4 keys, display unit 45, timer 46, pulse generator 47, first 48 and the second 49 counters, defibrator 50 "

The device works as follows.

The operation of the device is based on the use of signals generated by the Monitored Radio Station during the operation of its intended purpose, which ensures continuous monitoring of its operability. The initial state of all ten controlled switches 1-10 is as follows: the outputs of the controlled switches 1-6, 8 and 9 are connected to their first inputs, the input of the seventh controlled switch 7 is connected to its first output, the output of the tenth controlled switch 10 is connected to its second input. The first 43 and second 44 keys in the initial state are open,

In the Receive mode, the control is performed during the pauses of the received signals, which eliminates the ambiguity of the 1xB transmission factor of the high frequency path at different levels of the received signals, due to the automatic gain control (AGC) unit. For control, the voltage from the output of the AGC unit is used, which in the pauses of received signals is proportional to the level of first-stage receiver noise transmitted by the high-frequency (HF) track, the magnitude of which is constant and known. The presence of a pause is determined by the output level of the noise suppressor, which during pauses cuts off the audio frequency amplifier from the output of the detector detector.

In the Transmit mode, when there is no audio voltage at the microphone output, you control

0 power amplifier according to the level of the RF carrier signal, taken from the output of the power amplifier. In the presence of modulating voltage, the modulator and audio amplifier,

5 to which a dedicated audio signal is output from the detector output by self-service an. The modulator is monitored according to the method of double detection of the output RF signal of the power amplifier: at the output of the second detector 19, an envelope of the modulated RF signal is obtained, and at the output of the fourth detector 21 a constant voltage is obtained proportional to the envelope span, i.e. modulation depth level ..

The determination of the operation mode (Receive or Transmit) is performed according to the state of the transmitter start-up unit. In the Reception position, the voltage at the output of the transmitter start-up unit is zero, in the Transmission position, the negative voltage (casing) from the level output serves to obtain voltage levels that ensure the operation of the logic elements of the device. In the receive mode, the voltage at the output of block 37 corresponds to the logic level 1, in the transfer mode, to the logic level O.

The chains of the fourth detector 21 and the fourth trigger 28, the first detector 18 and the first trigger 25, the second detector 19 and the second trigger 26, the third detector 20 and the third trigger 27, and

5, the fifth trigger 29 is also used as threshold schemes. Level one 3 appears at the output of the fifth trigger 29 when the output exceeds 0

five

0

five

0

by the signals of the AGC block, the threshold of triggering the trigger 29, at the output of the second trigger 26 — if there is an RF carrier signal at the output of the amplifier, at the output of the fourth trigger 28 — if there is a low-frequency envelope of the RF signal, at the output of the first trigger 25 — when there is a signal microphone output, at the output of the third trigger 27 - in the presence of a signal at the output of the audio frequency amplifier of the monitored radio station, the output signals of all five triggers 25–29 are processed from. using the first 22, second 23 and third 24 elements NOT, first 30, second 31, third 32 and fourth 33 elements And, the first 11 second

12, the third 13 elements of RSHI, with the output of the processing result on the display unit A5.

In the Receive mode in the pause of the received RF signal, the noise passing through the RF path determines the maximum operating value of the output voltage of the ACS unit, i.e. The maximum gain of the RF path. The trigger threshold of the second trigger is 29 lips, but is higher than this voltage, therefore, at the output of the fifth trigger

29 there is a level O, at the output of the first element NOT 22 - level 1. The noise suppressor triggered in the presence of noise, high output voltage (level 1) prevents the passage of noise to the input of the audio amplifier. The second element And 31 combines level 1 from the outputs of level correction block 37, the first element NOT 22, the noise suppressor, will form level 1 at its output.

In this mode, at the output of the second element And 31, level 1 is formed only when the high-frequency path, the AGC block, noise suppressor fails, the failure of these blocks results in the output of the second element And 31 level O. When receiving the high-frequency signal, the noise suppressor receiver connects the UZCH to the detector of the receiver, while the output of the suppressor and the second element And 31 is level O. Saving the level 1, indicating the normal operation of the receiver, is provided by the third element OR 13 connected to the outputs of the second element And 31 and second

Q 5

0

first trigger 26 through the fifth element And 33.

The third trigger 27 is triggered when there is a sound signal at the output of the sound signal amplifier, as a result of which the output of the fifth element AND 33 and the output of the third element OR 13 forms level 1. A failure of the amplifier of sound frequencies when receiving an RF signal does not trigger the third trigger 27, and at the output of the third element OR 13, a level O is formed.

In the Transfer mode, at the output of level correction block 27, there is a level O, at the output of the third element HE 21 - a level. In the absence of the modulating voltage and the health of the power amplifier, the second trigger 26 is triggered, and at its output, as well as at the output of the first element And 30, level 1 is formed. When the power amplifier 5 of the second trigger 26 fails, it does not work, level O is formed. If there is an audio voltage at the microphone output, a good modulator and a power amplifier, the fourth trigger 28 is triggered to form the output level 1. The self-listening signal comes from the output of the self-test On the audio amplifier, when the third trigger 27 is activated, as a result, level 1 is generated at its output, output of the fourth element AND 33 and output of the first element OR 11.

During modulation, the variable voltage level at the output of the second detector 19 causes the second trigger 26, which periodically triggers, resulting in an alternation of the levels O and 1, at the output of the first element I 30. The output output of the first element I 30 is then blocked by the third element And 32. The presence of voltage at the output of the microphone triggers the first trigger

0

0

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25, as a result, a level O is formed at the output of the second element HE 23 and the third element AND 32. In addition, the level O at the output of the second element NO 23 prevents the unit from passing from the first element 30 and to the first element OR 11 in the event of a modulator failure, when the output of the amplifier is only an rf carrier signal. In this case, the control device would make a large decision on the operation of a working transmitter in the mode of emitting a carrier frequency signal.

Modulator failure does not trigger the third 27 and fourth 28 flip-flops, resulting in the output of the fourth element And 33 and the first element OR 11 O level is formed. The failure of the power amplifier does not trigger the third trigger 27, as a result of the fourth element Both the 33 and the first element of CHI 11 forms the level O, the second element of the ShZh 12 combines the outputs of the third element OR 13, form

85356

the pulse at the output of the sixth element I 35 starts the generator 47 1 pulsoB, switches the input of the seventh controlled switch 7 to the second output and switches the outputs of the corresponding controlled switches 1-6 to the second inputs.

The pulse generator 47 generates a sequence of pulses fed to the second binary counter 49, to the output of which the decoder 50 is connected, and level 1 appears sequentially at each of the five outputs of the decoder 50.

The further operation of the device is explained in the table. Self-checking consists in a sequential check of operation.

signaling the health of the device’s jQ-trigger

Nick, and the first element OR 11, which forms a signal about the health of the transmitter. At the output of the second element OR 12, level 1 appears in the operating modes of the radio station only when all blocks are operational. Failure I of any block in the monitored radio station I results in the output I of the second element OR 12 level-Io O, which is indicated by the block 45 I display.

I Self-checking of the device performs an IB mode Receiving a signal in the pause, which does not disrupt the functioning of the radio station as intended. I The transition of the device to the self-control | occurs when an impulse appears at the output of the sixth element I 35; The frequency of the pulses generated by the timer H-6 determines the frequency of the L-contour,

Level 1 signal appears on. The output of the sixth element I is 35 when re; Acce: At its inputs are levels 1 from the output of timer 46, from the output of block 37, Level Correction (in Receive mode), (From the output of noise suppressor (in Signal pause), Pr) and the output of the sixth element And the 35 level O device (iTB.o switches to the functional control mode of the radio station, the ratio of the duration (1 s) and the period (up to several tens of minutes)) generated by the timer 46 pulses does not interfere with the functional counter in pauses of received signals (duration of pauses is one and ten minutes). For the time of existence Im0

five

their input actions exceed thresholds of action. all triggers are 25-29.

When level 1 appears at the first output of the decoder 50, level 1 appears at the output of the seventh element OR 17, as a result of which, the controlled switch 10 switches the output to the second input, as a result, the third detector 20 receives a signal 42 audio frequency generator. When the third detector 20 and the third trigger 27 are operational, the latter is triggered, and level 1 appears at the second input of the first element AND 33. When the key 43 is open, the level 1 corresponding to the Receive mode is formed at the output of level correction block 37. With two levels 1 at the inputs of the fifth element AND 33, the output level 1 after the second 12 and third of the 13 elements OR and the seventh controlled switch goes to the first counter 48,

When level 1 appears at the second output of the decoder 50, the tenth controlled switch 10 switches to the first input, shorting the input of the third detector 20, as a result, level 1 at the output of the fifth element And 33 changes to level O. When the fifth trigger 29 is healthy, it it works in the first cycle of operation of the decoder 50 and does not change its state in the future,

As a result, at the output of the first element HE 22 and the second element a level O is formed. After that

five

0

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Consequently, the level O changes level, level 1 at the input of the first counter 40 in the second cycle of operation of the decoder 50.

Thus, the combination of levels 1–0 at the input of the first counter 48 is possible only when the device blocks that perform the function control in the Receive mode are operational.

When level 1 appears at the third output of the decoder 50 (as well as at the fourth and fifth outputs), level 1 appears at the inputs of the fifth 15 and sixth 16 OR elements. As a result of switching the ninth controlled switch 9 to the second input, the second detector 19 receives a signal from the high-frequency generator 41. At the same time, the output casing of the first key 43 is closed, and at the output of the level correction unit 37 a level O is formed, corresponding to the Transmission mode. At the output of the third element HE-24 a level 1 is formed; When the second trigger 26 is operational, it triggers and level 1 passes from the output of the first element AND 20 through the third element AND 32, the first element OR 11, the second element OR 12, the seventh controlled switch 7 to the first counter 48 (the output of the first trigger 25 has a level Oh, at the output of the second element is NOT 23 - level 1).

When level 1 appears at the fourth output of decoder 50, level 1 appears at the output of the fourth element OR 14 and as a result of switching the output of the eighth controlled switch B to the second input, the first detector 18 receives a signal from the audio frequency generator 42 attenuated by the first divider 38 eg to the level of the microphone output voltages. When the chain is healthy, the first detector 18 is the first trigger 25, the last one is triggered, at the output of the second element NOT 23 a level O is formed, which changes the level 1 at the input of the first counter A8.

When level 1 appears at the fifth output of decoder 50, the second key 44 is opened, the high frequency generator 41 is modulated from the audio frequency generator 3, and the detected RF signal envelope arrives at the input of the fourth detector 21. With

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0

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0

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the fourth detector 21, the fourth trigger 28, is activated, and the first input of the fourth element And 33 forms level 1. To obtain level 1 at the output of the fourth element And 33, such a level from the fifth output of the decoder 50 is fed to the input of the seventh element OR 17, and As a result of switching the output of the tenth control switch 10 to the output of the audio frequency generator 42, the third trigger 21 re-triggers, forming level 1 at its second input. After the first 11 and second 12 elements OR and the seventh controlled switch 7, level 1 is fed to the input of the first counter 48. In this case, it is necessary to separate the output of the third trigger 27 and the second input of the third element OR 13, since for their direct connection the level 1 would appear when the third trigger 27 triggers at the outputs of the first and second 12 elements OR regardless of the fourth trigger 28 triggered. This isolation is provided by the fifth element AND 33, at the output of which the level O is formed if there is .-; Level O at the output of block 21 kor-. Reactions level.

Thus, the sequence of levels 10101 at the input of the first counter 48 appears only when all units of the device for functional control are operational. In this case, combinations are formed on the first counter 48 sequentially: :: tslpo 01.10.11. Upon receipt of two levels 1 from the outputs of the bits of the first counter 48 to the inputs of the seventh element AND 36, the output level 1 arrives at the input of timer 46. The pulse at the second output of timer 46 stops, the output O is formed at the output of the sixth element 35 and the device goes to its original state the

In case of failure of the functional control device units, three pulses that differ in level do not arrive at the input of the first counter 48, level 1 does not appear at the input of timer 46. In the event of failure of sound .1 for the duration t of the pulse of timer 46 (t 5 t, where t, is the pulse period of the pulse generator 47), timer 46 generates a low level pulse at the first output that serves to indicate a device failure using the display unit 45. 47 pulse frequency generator

choose from condition f MIN

where f is the minimum frequency of the stimulating signals, i.e. frequency generator 42 audio frequency. For example, when, Hz, you can choose f, 100 - 200 Hz, when L., 0.7-0.8 s.

Claims (1)

Invention Formula Device for the functional control of radio stations by author (P 1285607, characterized by TeMj that, in order to increase the reliability of control, ten managed switches are introduced, the fifth, sixth and seventh elements AND, a fourth, fifth, sixth and seventh elements OR the first counter, first key, three The 20 switches, the outputs of the fourth, fifth, and sixth and seventh elements of OR are connected to the control inputs of the eighth and ninth controlled switches, respectively. voltage generator, timer, sequence of 25 first key and ten controllably connected generator of audio frequency, second key and high frequency generator, serially connected second counter and decoder, while the inputs of the first detector, JQ of the second detector, block to level correction, The fifth trigger, the third input of the second element, And the input of the third detector are connected respectively to the outputs of the first, second, third, fourth, fifth and sixth controlled switches, the first inputs of which are respectively microphone signals, power amplifier, transmitter start-up block, .Q block of automatic gain control, noise suppressor, audio amplifier of the controlled radio station, and the second inputs are connected 35 the first switch and the first inputs of the eighth, ninth and tenth controlled switches are connected to the common wire, the output of the audio frequency generator is connected to the combined input of the first voltage divider and the second input of the tenth controlled switch, the output of the high frequency generator connected to the second input of the ninth controlled switch, the output of the first voltage divider connected to the second input of the eighth controlled switch the first and second inputs of the fourth OR element are connected respectively with the fourth and fifth outputs of the decoder, the combined first, second and third inputs of the fifth and sixth elements OR are connected respectively to the third, fourth and fifth outputs of the decoder, the first and second inputs of the seventh element OR are connected respectively to the first and fifth outputs of the decoder The control input of the second key is connected to the fifth output of the decoder, the combined inputs of the second and third voltage dividers are connected to the output of the power source of the monitored radio station. respectively, with the outputs of the eighth controlled switch, the ninth managed switch, the first switch, the second voltage divider, the third voltage divider, the tenth controlled switch, the output of the second OR element is connected to the input of the seventh controlled switch, the first output of which is connected to the input of the display unit, and the second output to the input of the first counter, the outputs of two bits of which are connected to the first and second inputs of the seventh element And, the output of which is connected to the timer input, the first output of which is connected to the input of the display unit, and the second output - to the first input of the sixth element And, the second input of which is connected to the output of the fifth controlled switch, the third input is to the output of the level correction block and the first input of the I element, the second input of which is connected to the output of the Third Trigger, and the output is connected to the second input of the third IZH element, the output of the sixth I element to the input of the jTopa pulses and control inputs of the first, second, third, fourth, fifth, sixth and seventh controlled switches, the outputs of the fourth, fifth and sixth and seventh OR elements are connected to the control inputs of the eighth and ninth controlled switches. first key and tenth control em Q Q five five the first switch and the first inputs of the eighth, ninth and tenth controlled switches are connected to the common wire, the output of the audio frequency generator is connected to the combined input of the first voltage divider and the second input of the tenth controlled switch, the output of the high frequency generator is connected to the second input of the ninth controlled switch, the output of the first voltage divider is connected to the second input of the eighth controlled switch, the first and second inputs of the fourth OR element are connected respectively with the fourth and fifth outputs of the decoder, the combined first, second and third inputs of the fifth and sixth elements OR are connected respectively to the third, fourth and fifth outputs of the decoder, the first and second inputs of the seventh element OR are connected respectively to the first and fifth outputs of the decoder The control input of the second key is connected to the fifth output of the decoder, the combined inputs of the second and third voltage dividers are connected to the output of the power source of the monitored radio station. Note. (-E) is the negative voltage (case) of the power source; X is the open input state; U (- voltage, exceeding the trigger threshold of the fifth trigger 29; Uj - voltage, exceeding the threshold of the third trigger 27; 1 - logic level 1) 3 - voltage exceeding the threshold of the first trigger 25; V is the voltage above the threshold of the second trigger 26; Uj-- is a modulated voltage with an envelope level exceeding the threshold of the fourth trigger 28.