SU1583865A2 - Digital meter of characteristics of phase fluctuations - Google Patents

Abstract

The invention can be used in the analysis of phase and frequency oscillations of generators, synthesizers, tractors of radio engineering systems. The purpose of the invention is to improve the measurement accuracy in the analysis of phase fluctuations with high levels of non-linear distortion. The digital meter of phase fluctuation characteristics contains a device 1, an input terminal 2 of the signal under investigation, a terminal 3 of the reference signal, a source of 4 strobe pulses, a control unit 5, an amplitude comparator 6, a phase detector 7, a controlled attenuator 8, a sample-storage blocks 9 and 12, the converters 10 and 13 are analogous - a code, a controlled phase shifter 11, an arctangent calculation unit 14, a storage unit 15, an arithmetic unit 16, and a frequency divider 17, a phase detector 18, a low-pass filter 19, a highly stable oscillator 20. The goal is achieved by the formation of a reference signal having a small non-linear distortion and a multiple of the measured signal. 2 Il.

Description

Editor A0Kozopiz

Compiled by M. Katanova Tehred L. Serdyukova

Proofreader M.Kucher va

Order 2252

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VNIIPI State Committee for Inventions and Discoveries at the State Committee on Science and Technology of the USSR 113035, Moscow, Zh-35, Raushsk nab. 4/5

Production and Publishing Combine Patent, Uzhgorod, st. Gagarin, 101

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Claims (1)

The claims of the amplitude of the studied signal, therefore, the term in the first curly brackets of expression (3) can be omitted U '(t) = AjCosJo ^ t + sin [(k - Dw _e t] j. (4) Consider the case Cu ₀ ~ mn Я _{0 (1} , where m is an integer. Moreover, by Formulas (I), (2) and (4), ω _# Όί + ^ - cos [(k-1) ω, ΐ J + + <f ₀ = if ;; ^ 4 = 0, O) that is, device 1 does not perceive phase modulation with a frequency of (k-1) ss ₀ . This is a characteristic stroboscopic effect that occurs with a multiple-digital meter of the characteristics of phase fluctuations according to ed. No. 993148, characterized in that, in order to increase the accuracy of measurements in the analysis of phase fluctuation fluctuations with a high level of non-linear distortion, it is additionally introduced sequentially connected 50 phase detector, a low-pass filter and a controlled highly stable oscillator, as well as a frequency divider, the input of which connected to the input terminal of the signal under study, and the output to one of the inputs of the phase detector, the output of the controlled generator is connected to the input terminal of the reference signal and the second input of the phase detector.