JPS5697880A - Frequency measuring device - Google Patents

Frequency measuring device

Info

Publication number
JPS5697880A
JPS5697880A JP40580A JP40580A JPS5697880A JP S5697880 A JPS5697880 A JP S5697880A JP 40580 A JP40580 A JP 40580A JP 40580 A JP40580 A JP 40580A JP S5697880 A JPS5697880 A JP S5697880A
Authority
JP
Japan
Prior art keywords
frequency
measuring means
higher harmonic
sweep
frequency measuring
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP40580A
Other languages
Japanese (ja)
Other versions
JPS5849827B2 (en
Inventor
Naoharu Niki
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Advantest Corp
Original Assignee
Advantest Corp
Takeda Riken Industries Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Advantest Corp, Takeda Riken Industries Co Ltd filed Critical Advantest Corp
Priority to JP40580A priority Critical patent/JPS5849827B2/en
Publication of JPS5697880A publication Critical patent/JPS5697880A/en
Publication of JPS5849827B2 publication Critical patent/JPS5849827B2/en
Expired legal-status Critical Current

Links

Abstract

PURPOSE: To take accurate measurement even if the frequency of an input signal varies by making it possible to invert the frequency sweep direction of a local oscillator, and by determining a higher harmonic degree by measuring an intermediate frequency and local oscillation frequency twice respectively in sweeps in two forward and backward directions.
CONSTITUTION: During the unidirectional sweep of local oscillator 13, intermediate frequency measuring means 17 and local oscillation frequency measuring means 18 take measurements twice simultaneously at an interval of time respectively. Then, the sweep direction of local oscillator 13 is inverted and measurements are taken twice similarly. From measured frequencies Fi1 and Fi2 obtained by intermediate frequency measuring means 17 during the unidirectional sweep, and measured frequencies Fl1 and Fl2 by local oscillation frequency measuring means 18, higher harmonic degree (n) is found by using expression I. Next, measurement results after the sweep direction is inverted are similarly obtained, and the mean value of the both are calculated to determine higher harmonic degree N. In this constitution, the higher harmonic degree is determined by averaging two measurement results, so that even if the frequency of an input signal varies, the accurate frequency can be measured.
COPYRIGHT: (C)1981,JPO&Japio
JP40580A 1980-01-07 1980-01-07 frequency measurement device Expired JPS5849827B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP40580A JPS5849827B2 (en) 1980-01-07 1980-01-07 frequency measurement device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP40580A JPS5849827B2 (en) 1980-01-07 1980-01-07 frequency measurement device

Publications (2)

Publication Number Publication Date
JPS5697880A true JPS5697880A (en) 1981-08-06
JPS5849827B2 JPS5849827B2 (en) 1983-11-07

Family

ID=11472884

Family Applications (1)

Application Number Title Priority Date Filing Date
JP40580A Expired JPS5849827B2 (en) 1980-01-07 1980-01-07 frequency measurement device

Country Status (1)

Country Link
JP (1) JPS5849827B2 (en)

Also Published As

Publication number Publication date
JPS5849827B2 (en) 1983-11-07

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