SU1050124A1 - Device for monitoring and measuring sensitivity of collateral channels in radio sets - Google Patents

Description

put a voltage connected to the input of the picker, the second input of the third key and the first input of the fourth key, to the second input of which the second key is the second output

the third binary trigger, and the output of the fourth key is connected to the second input of the first key and the input of the modulator, the output of which is connected to the second input of the signal generator.

one

The invention relates to radio engineering, in particular, to a radio measuring technique, and can be used to automatically control and measure the sensitivity of the main and side reception channels in radio receivers.

A device is known for monitoring the sensitivity of side channels in radio receivers, which contains a control unit whose output is connected to an input of an oscillator, the output of which is connected to the input of a rational receiver, the output of which is connected to one input of an amplitude comparator to another input of which is connected to the output of the reference signal former and the indicator and serially connected start pulse shaper, first; binary trigger, the second binary trigger, a decoder, to the third and fourth inputs of which are connected the second and third Dy of the first binary trigger and the Deza element of coincidence, in this case. and the second outputs of the decoder are connected. The first inputs of the corresponding first and second elements match, the second inputs of which are connected to the output of the signal generator, the outputs of the first and second elements of COES and the third output of the decoder are connected to the inputs. Fault Norm, Not indicator norm, and the third output of the decoder , for example, a servo drive, and the indicator is made in the form of three light boards, the inputs of which are 1 inputs Fault, Normal, Not, indicator indicator 1},

However, the known device does not provide simultaneous automatic determination and registration of frequencies of side reception channels that do not satisfy the specified,

Closest to the invention is a device for monitoring the sensitivity of side channels in the pa :. diodes, containing a serially connected control unit and a signal generator, the output of which is connected to the input of a radio receiver, the output of which is connected to the first input of the amplitude comparator, and sequentially connected, a trigger pulse generator, the first binary trigger, the second binary trigger and a decoder, to the third and fourth inputs of which the second and third outputs of the first binary trigger are connected, and the first and second outputs of the decoder are connected to the inputs of the first and second match elements, to The second inputs of which are connected to the second output of the signal generator, while the outputs of the coincidence elements and the third output of the decoder are connected to the inputs Fault, Normal, Not normal of the indicator, made in the form of three light boards, whose inputs are the inputs Fault, Normal, Not normal. the third output of the decoder is connected to the first input of the control unit, and the output of the reference signal conditioner is connected to the second input of the amplitude comparator, while the output of the signal generator is connected to the output of the signal generator but connected to the first switch, the first counter, the divider and the LED-recorder, to which the second input and to the second inputs .Also divider, the first counter and control unit and the first input.-second counter connected to the output differentsialnoytsepi to

the input of which, as well as to the second input of the first key and the first input of the second key, is connected to the output of the trigger, to the input of which is connected; 3 output of the amplitude comparator, the output of the reference frequency generator through a second key connected in series and a second counter connected to the third input of the C2X divider However, the known device does not measure the sensitivity of the main reception channel. The purpose of the invention is to provide a measurement of the sensitivity of the main reception channel. Role and sensitivity measurements of side channels in radio receivers, containing two keys, successively connected control unit and sig generator The output of which is connected to the input of the radio, the output of which is connected to the first input of the amplitude comparator, to the second input of which the output of the reference signaling device is connected, and successively connected to the first starting driver, the first binary trigger, the second binary trigger and the decoder, to the third and the fourth inputs of which are connected to the second and third outputs of the first binary trigger, while the first and second outputs of the decoder are connected to the first inputs of the first and second elements to coincide nor, the inputs of which are connected to the second step of the signal generator, the outputs of the first and second elements of the match and the third output of the decoder are connected respectively to the inputs Fault, Normal, Not the norm of the first indicator, as well as the second indicator, the first indicator being made in the form of three light boards whose inputs are respectively the inputs Fault, Rate Not the rate of the first indicator, the trigger installation unit is reset, the modulator, the third and fourth keys, the switch, the constant source positive voltage and serially connected second trigger pulse shaper, third binary trigger and delay element whose output is connected to the first input of the second key whose output is connected to the input of the second indicator, and to the second input of the second key, to the first input of the first key and To the input of the second pulse forcing the start pulse, the output / 4 4 amplitude comparator is connected, and the output of the first switch is connected to the input of the first pulse driver for the start, the output of which is combined with the output of the installation unit three in the initial state, the first output of the third binary trigger is connected to the first input of the third key, the output of which is combined with the second output of the signal generator and the output of the switch and connected to the input of the control unit, the output of the constant positive voltage source is connected to the input of the switch, the second input of the third key and the first input of the fourth key, to the second input of which the second output of the third binary trigger is connected, and the output of the fourth key is connected to the second input of the first key and a modulator input, the output of which is connected to the second input of the signal generator. The drawing shows a structural electrical circuit of this device. The device for monitoring and measuring the sensitivity of side channels in radio receivers comprises a control unit 1, a generator of 2 signals, a radio receiver 3, an amplitude comparator k, a driver 5 of the reference signal, the first key 6, the second key 7 , the first driver 8 start pulse, the first binary three | - Ger 9, the second binary trigger 10, the decoder 11, the first match element 12, the second match element 13, the first indicator k, containing a light panel 15, light bar Norma 16, light bar Not normal 17, modulator 18, reset trigger unit t9, second indicator 20, second trigger pulse generator 21, third binary trigger 22, delay element 23, third key 2k , fourth key 25, constant-voltage source 26, switch 27o This device operates as follows. In its initial state, control unit 1 is turned off by the voltage coming from the constant-voltage source 26 output through a closed switch 27, the Third binary trigger 22 is in its initial state in such a way that the voltage U o generated at its second output is applied to the 8th input of the fourth key 25, and the voltage U2 O is applied to the first input of lifJeTbero cl. 2 and the input of the element delays 23 1; 1 rdulor 18 is switched off by the voltage of the source 2b of a constant positive voltage and is received through the quarters of the key 25 o The first and second binary triggers 9 and 10 are in the initial state 1, 1. At the same time, the outputs decoder 11 respectively equal to Uz -f O. (Voltage and, applied to the first input of the first element of the match 12, and voltage (J and 05 are attached respectively to the first input of the second, ich element of the match 13. and the board is not the norm 17 of the first indicator 1 To monitor and measure the sensitivity of the main and side channels the receiving frequency f of the p-ator signal gene 2 is set to the upper limit of the control range 2 At the input of the radio receiver 3, a signal X is applied to the level X equal to a given norm which creates a signal V at the output of the radio receiver 3 that compares further with the level of the reference signal dash shaper 5 reference signal. The control unit 1, in the presence of zero voltage at its input (for which it is necessary to open switch 27 at the initial moment of time), makes a gradual change in the frequency of the generator of 2 signals in a controlled frequency range of 2 - ° In this case, the following control results can occur In the case of a malfunction of the monitored radio receiver at the output of the amplitude comparator h, the different signal do y - VQ will be negative (0) in the controlled frequency range. The signal will not cause a change in the initial state of the device circuit. At the end of the tuning range of the generator 2 voltage switches from the limit switch of the signal generator 2, the first matching element 12 is triggered, including the light panel Fault 15 of the first indicator In the case of a predetermined norm on the sensitivity of the side reception channels during the tuning of the generator 2 signals within the passband the main receiving channel at the level of the norm at the output of the amplitude comparator appears a positive voltage the start, which translates the first and second binary triggers 9 and 10 and the position 1 1 to position O, 1, which appears at the second output of the decoder 11, the appearance of a voltage and O, arriving at the first input of the second element of the match 13, as a result of which the range of tuning the signal generator 2 triggers the second element coincidence 13, which turns on the light table 1b. Norm of the first indicator} k. At the same time, the second shaper 21 of the trigger pulse triggers the third binary trigger 22 to a new outcome, voltage C / open The third key is turned on and the control unit 1 is turned off by the voltage of the source 26 of a constant positive voltage. O turns off the fourth key 25, which causes the modulator 18 to turn on. When the modulator 18 is turned on, the sensitivity of the main reception channel of the radio receiver is measured. The amplitude X of the high-frequency signal produced by generator 2 a-1 galoa begins to change according to a sawtooth law with a period Td. The delay element 23 delays the connection of the second indicator 20 by the time the signal y decreases at the output of the radio receiver 3 to zero, since a certain time is necessary to effect an initial change in the signal magnitudes X of the signal generator 2 from the value X to zero. The first key b disables the subsequent part of the device circuit, i.e., blocks 8, 9, 10 and TODO, since the voltage on one of its inputs is zero. When the signal X reaches the signal changing from the sawtooth law, from zero sensitivity value The main receiving channel of the radio receiver 3 at the output of the amplitude comparator 4 produces a signal L. This signal passes through the second key 7 to the second indicator 20, where the sensitive signal is recorded

Claims (1)

DEVICE FOR MONITORING AND MEASURING SENSITIVITY OF ADVANCED CHANNELS IN RADIO RECEIVERS, containing two keys, sequentially connected control unit and signal generator, the output of which is connected to the input of the radio receiver, the output of which is connected to the first input of the amplitude comparator, to the second input of which the output of the reference signal driver is connected , and in series the first trigger signal shaper, the first binary trigger, the second binary trigger and decoder, to the third and fourth inputs of which are: о the second and third outputs of the first binary trigger are connected, while the first and second outputs of the decoder are connected to the first inputs of the first and second coincidence elements, the second output of the signal generator is connected to the second inputs, the outputs of the first and second matches and the third decoder output are connected respectively to · Inputs Fault, “Normal, Not the norm of the first indicator, as well as the second indicator, and the first indicator is made in the form of three light displays, the inputs of which are respectively the inputs Fault, Normal, Not normal, of the first indicator, characterized in that, in order to ensure sensitivity measurement of the main reception channel a block for setting triggers to initial state, a modulator, third and fourth keys, a switch, a constant positive voltage source and a second trigger pulse shaper connected in series, the third foreign trigger and delay element, the output of which is connected to the first input of the second key, the output of which is connected to the input of the second indicator, and the output of the amplitude output is connected to the first input of the first key and to the input of the second trigger pulse: com'parator, and the output of the first key is connected to the input of the first trigger pulse shaper, the output of which is combined with the output of the trigger installation unit in the initial state, while the first output of the third binary trigger is connected to the first input of the trigger rd key, whose output is combined with the second output generator. a torus of signals and the output of the switch and is connected to the input of the control unit, the output of a constant source SU „, 1050124 1050'24 of positive voltage is connected to the switch input, the second input of the third key and the first input of the fourth key, to the second input of which the second output of the third binary) trigger is connected, and the output of the fourth key is connected to the second input of the first key and the modulator input, the output of which is connected to the second input of the signal generator.