SU1525588A1 - Meter of time parameters of r.f. pulse envelope - Google Patents

Abstract

The invention relates to electrical measuring equipment and can be used in high precision devices for measuring the temporal parameters of radio pulses. The aim of the invention is to improve the measurement accuracy, which is achieved by eliminating the error due to the non-linearity of the amplitude response of the detector. The time meter of the radio pulse envelope contains: generator 1, detector 2, oscilloscope 3, pulse generator 4, signal adder 5, phase shifter 6, signal divider 7, and signal ratio meter 8. High measurement accuracy is ensured by introducing a phase shifter, a signal divider, a signal ratio meter, a signal adder and corresponding functional connections. 4 il.

Description

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The invention relates to electrical measurement technology and provides high accuracy in measuring the timing of radio pulse parameters.

The purpose of the invention is to improve the measurement accuracy by eliminating the error caused by the non-linearity of the amplitude characteristic of the detector.

FIG. 1 shows a block diagram of a time meter for the envelope of a radio pulse; 2 through 4 are images on the oscilloscope screen.

The device comprises an oscillator 1, a detector 2, an oscillograph 3, an oscillator 4 of pulses, a signal cooler 5, a phase shifter 6, a divider 7 of signals, a meter In relation to signals. Positions 9, 11, and 13 denote the lower horizontal risk on the oscilloscope screen, and positions 10, 12, and 14 denote oscillograms.

One generator output 4 pulses through a series-connected generator 1, adder 5 and detector

2 is connected to one input of the oscilloscope 3, the other input of which is connected to the second output of the generator 4 pulses. The second output of the generator 1 is connected via a serially connected phase shifter 6 and a divider 7 signal connected to the input of the meter 8 of the signal ratio. The second output 7 is connected to the second input of the adder 3.

The measurement of the parameters of the envelope of the radio pulses works as follows.

From the second signal generator of 4 pulses to the first input of the oscilloscope

3, a synchronization pulse triggers the oscilloscope sweep 3, the first output of the generator 4 pulses to the input of the generator 1 receives modulating pulses. From the first output of the generator 1, the radio pulses arrive at the first input of the adder

5 signals, and from the second output - a sinusoidal signal through the phase shifter 6 is fed to the input of the signal divider 7, from the first output of which a part of the input signal is fed to the input of the meter In terms of signals and from the second output of the divider 7 signal is JioB, adder 5 signals. From the output of the hummator 5 signals, the signal is fed to the input of the detector 2, from the output of which the detected sig

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It arrives at the second input of the oscilloscope 3. The pulse generator A and the generator 1 are turned off. On the oscilloscope screen, the scan line is aligned with the lower horizontal risk 9. Generator 1 is turned on and the power at its second output is reduced to a value at which the distance between the scan line on the oscilloscope screen 3 and the lower horizontal risk is no more than 3% of the size of the working part. screen vertically. The generator of 4 pulses is turned on, while the oscillogram of the detected radio pulse is picked up on the oscilloscope screen. The magnitude of the signal at the first output of generator 1 is set such that the amplitude of the pulse waveform is 50% of the vertical working part of the screen. According to the oscillogram 10, at the lower ropfti-horizontal risk 9 on the oscilloscope screen (Fig. 2), the instants of time t and t are determined, in the interval between which the instantaneous value of the oscillogram of the pulse reaches its maximum value. The pulse generator 4 is turned off and the signal at the second output of generator 1 is increased to a value at which the distance between the scanning line and the lower horizontal risk on the oscilloscope screen is 50% of the vertical working part of the screen, and the generator of 4 pulses is turned on. By adjusting the phase shift with the phase shifter 6, and then by adjusting the power at the second output of the oscillogram 12 of the signal 12 in the time interval c - t, it is aligned with the lower horizontal 11Aa screen of the oscilloscope (Fig. 3). By meter In relation to the signals, the initial value of the signal is recorded and the "input Fia" arrives. Dp of measuring the duration of the radio pulse envelope at 0.3 from the amplitude of this envelope, the signal at the second output of generator 1 is reduced to a value at which the signal recorded by the meter In relation to the signals, becomes 0.5 and. The length of the envelope of the radioimpu; 1s, at a level of 0.3, is measured using an oscilloscope 3, it is equal to the time interval i / hex at times t, and t,

51525588

oscillogram 14 refers to the lower horizontal risks on the oscilloscope screen (Fig. 4).

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The time meter G1 & radio pulse envelope measurements, containing the generator, detector, oscilloscope and pulse generator, the first output of which is connected to the generator input, and the second output of the pulse generator is connected to the first oscilloscope, and

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detector is connected to the second input of the oscilloscope, characterized in that, in order to improve the measurement accuracy, a phase rotator, a signal divider, a signal ratio meter and a signal adder, through which the output of the torus generator-i is connected to the input detector,

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Claims (1)

Claim A measuring instrument of temporal parameters of the envelope of radio pulses, comprising a generator, detector, oscilloscope and a pulse generator, the first output of which is connected to the input of the generator, and the second output of the pulse generator is connected to the first input of the oscilloscope, the output of the detector being connected to the second input of the oscilloscope, characterized in that, in order to increase the accuracy of measurements, a phaeo rotator, a signal divider, a signal ratio measuring instrument, and a signal adder through which the generator output is connected to the detector input, IQ, are introduced into it wherein the second output of generator Jun e ⁿ divider and phase shifter signals' is connected to input measuring signal ratio and the second signal divider output is connected to the second input 15 adder signals. FIG. 2 FIG. 3 FIG. 4