Measurement method of radio frequency pulse jitters

Abstract

The invention discloses a measurement method of radio frequency pulse jitters and belongs to the radio frequency signal test technical field. The method comprises the following steps that: (1) radio frequency pulse signals are sampled, and sampled data are obtained and stored as a data file; (2) a software program is utilized to perform digital down-conversion and IQ demodulation on the sampled data and local oscillation signals, a modulus is solved, and digital signals of pulse envelops are obtained, and the local oscillation signals are digital signals of a corresponding radio frequency; (3) software is utilized to perform statistics, so that pulse jitter indicators are obtained, wherein the pulse jitter indicators are composed of the pulse width mean value, pulse width jitter mean value, pulse width jitter variance, maximum pulse width difference value, pulse repetition period jitter mean value and jitter variance of all pulse samples; and (4) whether the pulse jitter indicators obtained in the step (3) satisfy requirements is judged. With the measurement method of the invention adopted, the high-precision analysis of the radio frequency pulse jitters can be realized, and the statistics and quantitative analysis of a large number of pulse jitters can be also realized.

Description

technical field [0001] The invention belongs to the technical field of radio frequency signal testing, and in particular relates to a method for measuring radio frequency pulse jitter. Background technique [0002] In the development of the RF pulse system, it is necessary to measure the index of the RF pulse jitter to judge the stability of the pulse signal. Pulse jitter usually consists of two metrics: pulse width jitter and pulse repetition period jitter. Pulse width jitter refers to the difference between pulse widths among several different pulses; pulse repetition period jitter refers to the difference between several different pulse repetition periods. The smaller the two differences, the higher the stability of the pulse signal. [0003] At present, a detector is generally used to detect the pulse envelope of the radio frequency signal, and an oscilloscope is used to observe the pulse envelope, read multiple pulse width values, pulse repetition period values, etc.,...

AI Technical Summary

Problems solved by technology

[0005] 1. Due to the capacitance characteristics of the detector, it will directly affect the characteristics of pulse jitter, and it is impossible to achieve high-precision (nanosecond level) analysis of pulse jitter

[0006] 2. Due to the limitations of the time and precision displayed by the oscilloscope, generally only one or dozens of pulse patterns can be displayed or superimposed. Statistical and quantitative analysis of the jitter characteristics of a large number of pulse signals requires a lot of manpower and time.

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