GB2056096A - A method and device for measuring the reception quality of a frequency-modulated VHF signal - Google Patents

A method and device for measuring the reception quality of a frequency-modulated VHF signal

Info

Publication number
GB2056096A
GB2056096A GB8033789A GB8033789A GB2056096A GB 2056096 A GB2056096 A GB 2056096A GB 8033789 A GB8033789 A GB 8033789A GB 8033789 A GB8033789 A GB 8033789A GB 2056096 A GB2056096 A GB 2056096A
Authority
GB
United Kingdom
Prior art keywords
vhf signal
measuring
frequency
reception quality
amplitude
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.)
Withdrawn
Application number
GB8033789A
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.)
Bossert T T
Original Assignee
Bossert T T
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 Bossert T T filed Critical Bossert T T
Publication of GB2056096A publication Critical patent/GB2056096A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/16—Circuits
    • H04B1/1646—Circuits adapted for the reception of stereophonic signals
    • H04B1/1661—Reduction of noise by manipulation of the baseband composite stereophonic signal or the decoded left and right channels
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H1/00—Buildings or groups of buildings for dwelling or office purposes; General layout, e.g. modular co-ordination or staggered storeys
    • E04H1/12—Small buildings or other erections for limited occupation, erected in the open air or arranged in buildings, e.g. kiosks, waiting shelters for bus stops or for filling stations, roofs for railway platforms, watchmen's huts or dressing cubicles
    • E04H1/125—Small buildings, arranged in other buildings
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
    • G01R29/06—Measuring depth of modulation
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
    • G01R29/08—Measuring electromagnetic field characteristics
    • G01R29/0864—Measuring electromagnetic field characteristics characterised by constructional or functional features
    • G01R29/0892—Details related to signal analysis or treatment; presenting results, e.g. displays; measuring specific signal features other than field strength, e.g. polarisation, field modes, phase, envelope, maximum value
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers without distortion of the input signal
    • H03G3/20—Automatic control
    • H03G3/30—Automatic control in amplifiers having semiconductor devices
    • H03G3/3052—Automatic control in amplifiers having semiconductor devices in bandpass amplifiers (H.F. or I.F.) or in frequency-changers used in a (super)heterodyne receiver
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J3/00—Continuous tuning
    • H03J3/02—Details
    • H03J3/12—Electrically-operated arrangements for indicating correct tuning
    • H03J3/14—Visual indication, e.g. magic eye
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
    • H04B1/1027—Means associated with receiver for limiting or suppressing noise or interference assessing signal quality or detecting noise/interference for the received signal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/309—Measuring or estimating channel quality parameters

Abstract

There is proposed a simple possibility of assessing the quality of the VHF stereophonic reception in an oscillogram. The amplitude of the VHF signal carrier is adjusted to a constant value and simultaneously the interfering amplitude modulated upon the VHF signal carrier is left unaffected. By this means, the reference axis formed by the carrier amplitude is retained in the oscillogram during the entire measuring operation.
GB8033789A 1977-05-28 1978-10-25 A method and device for measuring the reception quality of a frequency-modulated VHF signal Withdrawn GB2056096A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2724375A DE2724375C3 (en) 1977-05-28 1977-05-28 Method and device for measuring the reception quality of a frequency-modulated VHF signal

Publications (1)

Publication Number Publication Date
GB2056096A true GB2056096A (en) 1981-03-11

Family

ID=6010227

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8033789A Withdrawn GB2056096A (en) 1977-05-28 1978-10-25 A method and device for measuring the reception quality of a frequency-modulated VHF signal

Country Status (5)

Country Link
AT (1) AT361581B (en)
BE (1) BE87T1 (en)
DE (1) DE2724375C3 (en)
GB (1) GB2056096A (en)
NL (1) NL7815070A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0505072A2 (en) * 1991-03-20 1992-09-23 Matsushita Electric Industrial Co., Ltd. Signal strength indicator for receiver

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2929647A1 (en) * 1979-07-21 1981-02-12 Blaupunkt Werke Gmbh HF receiver circuit for e.g. motor vehicle - has stereo to mono changeover with filter and threshold switches to reduce interference

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0505072A2 (en) * 1991-03-20 1992-09-23 Matsushita Electric Industrial Co., Ltd. Signal strength indicator for receiver
EP0505072A3 (en) * 1991-03-20 1992-12-16 Matsushita Electric Industrial Co., Ltd Signal strength indicator for receiver
US5355530A (en) * 1991-03-20 1994-10-11 Matsushita Electric Industrial Co., Ltd. Receiver using receiving condition signal for correcting influence of the reception band width

Also Published As

Publication number Publication date
DE2724375A1 (en) 1978-11-30
AT361581B (en) 1981-03-25
DE2724375C3 (en) 1979-11-22
BE87T1 (en) 1980-11-07
DE2724375B2 (en) 1979-03-29
ATA663778A (en) 1980-08-15
NL7815070A (en) 1980-12-31

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)