SU661391A1

SU661391A1 - Radio signal spectrum analyzer

Info

Publication number: SU661391A1
Application number: SU772464734A
Authority: SU
Inventors: Олег Николаевич Денисов; Борис Алексеевич Пузанов; Владимир Викторович Ветер; Николай Абрамович Симкин
Original assignee: Предприятие П/Я А-3565
Priority date: 1977-03-21
Filing date: 1977-03-21
Publication date: 1979-05-05

Description

Изобретение относитс к области радиоизмерений .This invention relates to the field of radio measurements.

Известно устройство дл измерени несущих частот сигнала, содержащее устройство выделени значени сигнала в стробируемьгй интервал времени и преобразовани его в импульсную форму, сумматор, осуществл ющий сложение данного сигнала с предыдущим , компаратор, блок выработки констант, элемент задержки, выполненный в виде регистра 1.A device for measuring signal carrier frequencies is known, which contains a device for extracting a signal value into a gating time interval and converting it into a pulsed form, an adder that adds this signal to the previous one, a comparator, a unit for generating constants, a delay element made in the form of a register 1.

Недостатком данного устройства вл етс его сложность.The disadvantage of this device is its complexity.

Наиболее близким по технической сущности к данному изобретению вл етс анализатор , содержащий блок обработки радиосигна та , вход которого соединен со входной щиной, а выход которого подключен к первому входу электронного ключа, второй вход которого соединен с первым выходом генератора тактовых импульсов, а выход которого через последовательно включенные дисперсионную линию задержки и усилитель соединен с модул тором электронно-лучевой трубки индикатора, ждущий генератор пилообразного напр жени , вход которого соединен с первым выходом reirepaTOpa тактовых импульсов, а выход подключен к вход) усилител горизонтального отклонени луча электронно-лучевой трубки индикатора 2. Данное устройство не обеспечивает достаточной точности измерени закона модул ции радиосигнала.The closest to the technical essence of this invention is an analyzer containing a radio signal processing unit, the input of which is connected to the input width, and the output of which is connected to the first input of the electronic key, the second input of which is connected to the first output of the clock generator, and the output of which series-connected dispersion delay line and amplifier connected to an indicator-tube modulator, waiting for a saw-tooth voltage generator, whose input is connected to the first This output is connected to the input of the amplifier for horizontal deflection of the cathode ray tube of the indicator 2. This device does not provide sufficient accuracy in measuring the law of modulation of the radio signal.

Целью изобретени вот ете иовьппение точности измерени закона модул нии радиосигнала .The aim of the invention is to determine the accuracy of measuring the law of modulation of a radio signal.

Поставленна цель достигаетс тем, чтоThe goal is achieved by the fact that

в анализатор, содержащий блок обработки радиосигнала, вход которого соединен ео входной щиной, а выход которого подключен к первому входу электронного клича, второй вход которого соединен с первым Btjixoдом генератора тактовых импульсов, а вы ход электронного ключа через последовательно включенные дисперсио гную ли1Н1Ю задержки и усилитель соединен с модул тором электронно-лучевой трубки индикатора, ждущий генератор пилообразного напр жени ,an analyzer containing a radio signal processing unit whose input is connected to its input thickness, and the output of which is connected to the first input of an electronic call, whose second input is connected to the first clock generator of the electronic clock, and the output of the electronic switch through a series-connected delay and amplifier connected to an indicator tube modulator, waiting for a sawtooth generator,

Claims

0 whose input is connected to the first output of the clock generator, and the output is connected to the input of the horizontal deflection amplifier of the cathode ray tube of the indicator tube, which also contains the amplifier of the vertical deflection of the beam of the cathode ray tube of the indicator; whose counting input is connected to the second output of the clock generator, and the counter output is connected through a code-frequency converter to the input of a vertical amplifier deflection of the beam of the cathode ray tube of the indicator, where the first output of the driver of trigger pulses is connected to the reset input of the counter, the second output of the driver of trigger pulses is connected to the input of the clock generator, and the output of the driver of the generator of radio signal processing, as well as the driver trigger pulses consists of a series-connected detector, a video amplifier, a threshold element, and a back edge pulse former, the output of which a is the first output of the trigger pulse, the output of the threshold element is a second output, and the input of the detector is the input of the trigger momenta. The structural electrical circuit of the analyzer described is shown in the drawing. The analyzer contains a radio signal processing unit 1, an electronic switch 2, a dispersion delay line 3, a y-sill 4, a waiting sawtooth generator 5, a trigger pulse generator 6, consisting of detector 7, video amplifier 8, threshold element 9, and a back edge pulse generator 10, clock generator 11, counter 12, code-frequency converter 13, indicator 14, consisting of amplifiers 15, 16 and cathode ray tube 17. Amplifier detector 18 and video amplifier 19 are included in amplifier 4. Measured signal served on the input bus 20. The analyzer's principle of operation is as follows. If there is a signal at the output of the radio signal processing unit 1 of the control voltage from the driver of the trigger pulses 6, the clock pulse generator 11 is in generation mode. The clock pulses with a follow-up period slightly exceeding the maximum delay time of the dispersion delay line 3 begin to flow to the control input of the electronic key 2, to the input of the waiting generator of the saw-tooth voltage 5 and the counting input of the counter 12. The duration of the clock pulses is chosen much less than the time of the maximum s The supports of the dispersion delay line 3. At the output of the electronic key 2, radio pulses will be present, the carrier frequency of which is equal to the instantaneous frequency of the signal, and the duration is equal to the duration of the clock pulses. At the output of the dispersion delay line and amplifier 4 there will be pulses delayed relative to the clock for a time proportional to the carrier frequency of the radio pulses. Indicator 14 receives the code of the number of the clock pulse, the current time from each clock pulse and video pulses delayed relative to the clock pulse, proportional to the frequency of the signal at the moment of the existence of the clock pulse. By counting the time of arrival of each video pulse arriving at the cathode-ray tube 17 of the indicator 14, one can determine the law of variation of the frequency of the received signal from tick to tick. At the end of the signal, the clock pulse generator 11 is locked and the counter 12 is reset. For each clock pulse, a constant frequency increment from amplifier 16 is applied to the vertical plates. The mark of each sample of the signal that passes through the dispersion delay line 3 will be in the form of a dot. 1. Spectrum analyzer of a radio signal frequency spectrum containing a radio signal processing unit, the input of which is connected to the input width, and the output is connected to the first input of an electronic key, the second input of which is connected to the first output of a clock generator, and the output of an electronic key through series-connected dispersion line the delay and the amplifier is connected to the modulator of the cathode ray tube of the indicator, the waiting generator of a sawtooth voltage, the input of which is connected to the first output of the generator so pulses, and the output is connected to the input of an amplifier for horizontal deflection of the cathode ray tube of the indicator, which also contains an amplifier for vertical deflection of the beam of the cathode ray tube of the indicator, characterized in that, in order to improve the accuracy of measuring the modulation law of the radio signal, pulses, code-frequency converter and a counter, the counting input of which is connected to the second output of the clock, and the output of the counter is connected through a converter d-frequency with the amplifier input of the vertical deflection of the beam of the cathode-ray tube of the indicator, the first output of the driver trigger generator is connected to the reset input of the counter, the second output of the driver pulse generator is connected to the input of the clock generator, and the driver's input

trigger pulses connected to the output of the radio signal processing unit.

2. Radio frequency spectrum analyzer according to claim 1, characterized in that the trigger pulse generator consists of a series-connected detector, a video amplifier, a threshold element and a falling edge of the pulse, the output of which is the first output of the trigger pulse generator, the output of the threshold element is the second output, and the detector input is the trigger driver input.

Sources of information taken into account in the examination

1. For the UK of UK number 1382524, cl. G 4 H, 05.02.75.

2. USSR author's certificate number 479046, cl. G O R 23/16, 02.28.73.