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GB1402163A - Frequency measurement - Google Patents

Frequency measurement

Info

Publication number
GB1402163A
GB1402163A GB4670072A GB4670072A GB1402163A GB 1402163 A GB1402163 A GB 1402163A GB 4670072 A GB4670072 A GB 4670072A GB 4670072 A GB4670072 A GB 4670072A GB 1402163 A GB1402163 A GB 1402163A
Authority
GB
United Kingdom
Prior art keywords
frequency
signal
harmonics
range
harmonic
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.)
Expired
Application number
GB4670072A
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.)
Khoury K I
FLANN MICROWAVE INSTR Ltd
Original Assignee
Khoury K I
FLANN MICROWAVE INSTR 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 Khoury K I, FLANN MICROWAVE INSTR Ltd filed Critical Khoury K I
Priority to GB4670072A priority Critical patent/GB1402163A/en
Priority to DE19732350939 priority patent/DE2350939A1/en
Priority to FR7336194A priority patent/FR2202294B1/fr
Publication of GB1402163A publication Critical patent/GB1402163A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R23/00—Arrangements for measuring frequencies; Arrangements for analysing frequency spectra
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R23/00—Arrangements for measuring frequencies; Arrangements for analysing frequency spectra
    • G01R23/02—Arrangements for measuring frequency, e.g. pulse repetition rate; Arrangements for measuring period of current or voltage

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)
  • Other Investigation Or Analysis Of Materials By Electrical Means (AREA)

Abstract

1402163 Digital frequency meter FLAN MICROWAVE INSTRUMENTS Ltd and K I KHOURY 10 Jan 1974 [10 Oct 1972] 46700/72 Heading H3H Apparatus for automatically measuring the frequency of a signal 15 lying above the upper limit of direct frequency counters comprises means 10, 11, 12 for generating a succession of six reference frequencies F 1 - #F, F 1 , F 1 + #F, F 2 - #F, F 2 and F 2 + #F, means 13 for introducing a number of consecutive harmonics simultaneously with each reference frequency, means 14 for mixing the signal 15 with the reference signals and their harmonics, a low pass filter 16 having a cut-off frequency less than half the frequency of the lowest frequency reference signal (to avoid ambiquity where the frequency of signal 15 is approximately midway between adjacent harmonics) and computing and control means for determining from the resultant beat frequencies, the frequency of the signal 15. Preferably #F = #F. F 1 , F 2 and #F are selected to provide a continuous measurement range extending over a number of the harmonics. The computing works on the basis of determining the number of the harmonic of a selected one of the reference signals which is nearest to the signal 15, the value of the corresponding beat frequency and the sign of the difference between the frequency of signal 15 and said nearest harmonic. If the frequency of signal 15 is out of range this is indicated at 25. The range may extend up 19À999 GHz the most significant bit being represented by overspill.
GB4670072A 1972-10-10 1972-10-10 Frequency measurement Expired GB1402163A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB4670072A GB1402163A (en) 1972-10-10 1972-10-10 Frequency measurement
DE19732350939 DE2350939A1 (en) 1972-10-10 1973-10-10 DEVICE AND METHOD FOR FREQUENCY MEASUREMENT
FR7336194A FR2202294B1 (en) 1972-10-10 1973-10-10

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4670072A GB1402163A (en) 1972-10-10 1972-10-10 Frequency measurement

Publications (1)

Publication Number Publication Date
GB1402163A true GB1402163A (en) 1975-08-06

Family

ID=10442256

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4670072A Expired GB1402163A (en) 1972-10-10 1972-10-10 Frequency measurement

Country Status (3)

Country Link
DE (1) DE2350939A1 (en)
FR (1) FR2202294B1 (en)
GB (1) GB1402163A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2407481A1 (en) * 1977-10-31 1979-05-25 Raytheon Co FREQUENCY MEASURING DEVICE
CN103941086A (en) * 2014-03-25 2014-07-23 中国科学院长春光学精密机械与物理研究所 Ultrahigh precision frequency measurement instrument and measuring method thereof
CN105425031A (en) * 2015-12-04 2016-03-23 广东电网有限责任公司电力科学研究院 Method and system for acquiring zero initial phase reference quadrature frequency multiplication sequence from electric power signal

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2407481A1 (en) * 1977-10-31 1979-05-25 Raytheon Co FREQUENCY MEASURING DEVICE
CN103941086A (en) * 2014-03-25 2014-07-23 中国科学院长春光学精密机械与物理研究所 Ultrahigh precision frequency measurement instrument and measuring method thereof
CN105425031A (en) * 2015-12-04 2016-03-23 广东电网有限责任公司电力科学研究院 Method and system for acquiring zero initial phase reference quadrature frequency multiplication sequence from electric power signal
CN105425031B (en) * 2015-12-04 2018-01-30 广东电网有限责任公司电力科学研究院 The orthogonal frequency multiplication sequence method of zero initial phase benchmark and system are obtained from electric power signal

Also Published As

Publication number Publication date
FR2202294B1 (en) 1981-04-17
FR2202294A1 (en) 1974-05-03
DE2350939A1 (en) 1974-04-18

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee