GB2221045B - Frequency measurement apparatus - Google Patents

Frequency measurement apparatus

Info

Publication number
GB2221045B
GB2221045B GB8913553A GB8913553A GB2221045B GB 2221045 B GB2221045 B GB 2221045B GB 8913553 A GB8913553 A GB 8913553A GB 8913553 A GB8913553 A GB 8913553A GB 2221045 B GB2221045 B GB 2221045B
Authority
GB
United Kingdom
Prior art keywords
measurement apparatus
frequency measurement
frequency
measurement
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 - Lifetime
Application number
GB8913553A
Other versions
GB8913553D0 (en
GB2221045A (en
Inventor
Barry Trimmer
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.)
EMI Group Electronics Ltd
Original Assignee
Thorn EMI Electronics 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 Thorn EMI Electronics Ltd filed Critical Thorn EMI Electronics Ltd
Publication of GB8913553D0 publication Critical patent/GB8913553D0/en
Publication of GB2221045A publication Critical patent/GB2221045A/en
Application granted granted Critical
Publication of GB2221045B publication Critical patent/GB2221045B/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • G01R23/16—Spectrum analysis; Fourier analysis
    • G01R23/163—Spectrum analysis; Fourier analysis adapted for measuring in circuits having distributed constants
    • 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
    • G01R23/04—Arrangements for measuring frequency, e.g. pulse repetition rate; Arrangements for measuring period of current or voltage adapted for measuring in circuits having distributed constants
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R23/00—Arrangements for measuring frequencies; Arrangements for analysing frequency spectra
    • G01R23/16—Spectrum analysis; Fourier analysis
    • G01R23/17—Spectrum analysis; Fourier analysis with optical or acoustical auxiliary devices
GB8913553A 1988-06-13 1989-06-13 Frequency measurement apparatus Expired - Lifetime GB2221045B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB888813920A GB8813920D0 (en) 1988-06-13 1988-06-13 Frequency measurement

Publications (3)

Publication Number Publication Date
GB8913553D0 GB8913553D0 (en) 1989-08-02
GB2221045A GB2221045A (en) 1990-01-24
GB2221045B true GB2221045B (en) 1992-10-14

Family

ID=10638531

Family Applications (2)

Application Number Title Priority Date Filing Date
GB888813920A Pending GB8813920D0 (en) 1988-06-13 1988-06-13 Frequency measurement
GB8913553A Expired - Lifetime GB2221045B (en) 1988-06-13 1989-06-13 Frequency measurement apparatus

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB888813920A Pending GB8813920D0 (en) 1988-06-13 1988-06-13 Frequency measurement

Country Status (1)

Country Link
GB (2) GB8813920D0 (en)

Also Published As

Publication number Publication date
GB8813920D0 (en) 1989-03-30
GB8913553D0 (en) 1989-08-02
GB2221045A (en) 1990-01-24

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Legal Events

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

Effective date: 19930613