GB962367A - Method to measure the amplitude-frequency response curve over a fm-transmission system - Google Patents

Method to measure the amplitude-frequency response curve over a fm-transmission system

Info

Publication number
GB962367A
GB962367A GB29961/62A GB2996162A GB962367A GB 962367 A GB962367 A GB 962367A GB 29961/62 A GB29961/62 A GB 29961/62A GB 2996162 A GB2996162 A GB 2996162A GB 962367 A GB962367 A GB 962367A
Authority
GB
United Kingdom
Prior art keywords
frequency
test
amplitude
transmission system
frequency response
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
GB29961/62A
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Publication of GB962367A publication Critical patent/GB962367A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/46—Monitoring; Testing
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
    • G01R27/28—Measuring attenuation, gain, phase shift or derived characteristics of electric four pole networks, i.e. two-port networks; Measuring transient response
    • G01R27/30—Measuring attenuation, gain, phase shift or derived characteristics of electric four pole networks, i.e. two-port networks; Measuring transient response with provision for recording characteristics, e.g. by plotting Nyquist diagram

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)
  • Measurement Of Resistance Or Impedance (AREA)
  • Measuring Frequencies, Analyzing Spectra (AREA)

Abstract

962,367. Distortion measurements. STANDARD TELEPHONE & CABLES Ltd. Aug. 3, 1962 [Aug. 4, 1961], No. 29961/62. Heading G1U. The amplitude-frequency response curve of a FM transmission system is measured by superimposing a test frequency on a sweep frequency and varying the test frequency between 1/20 and “ of the 3-dB bandwidth of the transmission system. The embodiment illustrated is a differential slope measuring set as in Specification 866,257. The sweep frequency #s is selected to lie below the bandwidth of the test system 1. The test frequency #T is deliberately chosen to be sufficiently high that the amplitude-frequency response of the system 1 under test is no longer linear since it is in this region information is obtained as to the causes of distortion. The feature of the invention is to vary the test frequency over the range 1/20 -1/4 of the bandwidth of the test system. This can be done continuously, either manually or automatically, or the frequency can be switched over the range according to a predetermined programme.
GB29961/62A 1961-08-04 1962-08-03 Method to measure the amplitude-frequency response curve over a fm-transmission system Expired GB962367A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEST18167A DE1237652B (en) 1961-08-04 1961-08-04 Method for measuring the amplitude curve of an FM transmission system

Publications (1)

Publication Number Publication Date
GB962367A true GB962367A (en) 1964-07-01

Family

ID=7457746

Family Applications (1)

Application Number Title Priority Date Filing Date
GB29961/62A Expired GB962367A (en) 1961-08-04 1962-08-03 Method to measure the amplitude-frequency response curve over a fm-transmission system

Country Status (2)

Country Link
DE (1) DE1237652B (en)
GB (1) GB962367A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2528588C1 (en) * 2013-04-30 2014-09-20 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Национальный исследовательский Томский политехнический университет" Device to define amplitude-frequency and phase-frequency characteristics of current shunts
RU2585326C1 (en) * 2015-01-30 2016-05-27 Федеральное государственное автономное образовательное учреждение высшего образования "Национальный исследовательский Томский политехнический университет" Device for determining amplitude-frequency and phase-frequency characteristics of current shunts

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1018945B (en) * 1956-09-18 1957-11-07 Philips Patentverwaltung Measuring device for dynamic checking of ratio detectors

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2528588C1 (en) * 2013-04-30 2014-09-20 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Национальный исследовательский Томский политехнический университет" Device to define amplitude-frequency and phase-frequency characteristics of current shunts
RU2585326C1 (en) * 2015-01-30 2016-05-27 Федеральное государственное автономное образовательное учреждение высшего образования "Национальный исследовательский Томский политехнический университет" Device for determining amplitude-frequency and phase-frequency characteristics of current shunts

Also Published As

Publication number Publication date
DE1237652B (en) 1967-03-30

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