GB1515229A - Method and apparatus for measuring the nonlinearity of quasi-linear systems - Google Patents

Method and apparatus for measuring the nonlinearity of quasi-linear systems

Info

Publication number
GB1515229A
GB1515229A GB4569176A GB4569176A GB1515229A GB 1515229 A GB1515229 A GB 1515229A GB 4569176 A GB4569176 A GB 4569176A GB 4569176 A GB4569176 A GB 4569176A GB 1515229 A GB1515229 A GB 1515229A
Authority
GB
United Kingdom
Prior art keywords
response
signal
function
threshold
level
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
GB4569176A
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.)
POSTA KISERLETI INTEZET
Original Assignee
POSTA KISERLETI INTEZET
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 POSTA KISERLETI INTEZET filed Critical POSTA KISERLETI INTEZET
Publication of GB1515229A publication Critical patent/GB1515229A/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
    • G01R23/16—Spectrum analysis; Fourier analysis
    • G01R23/20—Measurement of non-linear distortion

Landscapes

  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Current Or Voltage (AREA)
  • Testing Electric Properties And Detecting Electric Faults (AREA)

Abstract

1515229 Measuring non-linear distortion POSTA KISERLETI INTEZET 3 Nov 1976 [5 Nov 1975] 45691/76 Heading G1U In measuring the non-linearity of a nominally linear system, the response to a test signal is analyzed to provide an output representing a distribution function of the response which is both independent of the level of the response and which indicates the non-linearity. The Specification describes circuits for producing signals representing the amplitude distribution function (i.e. the probability that the response signal is less than or equal to a given threshold), the amplitude density distribution function (i.e. the probability that the response lies within the range between a threshold value x and x+#x, where #x is very small), and the density-moment function (i.e. the product of the means of the response signal and the threshold exceeding function, this being the probability of the response signal exceeding a given threshold. All these functions remain constant so long as the response signal shows no sign of distortion. The test signal is preferably stochastic e.g. Gaussian noise, but may also be a stationary signal providing the distribution functions thereof can be determined. The threshold level is always taken as the mean level of the response signal, and the function signal is averaged and compared to a reference level representing the mean value of an undistorted response, Figs. 10-16 (not shown).
GB4569176A 1975-11-05 1976-11-03 Method and apparatus for measuring the nonlinearity of quasi-linear systems Expired GB1515229A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
HU75PO00000604A HU172706B (en) 1975-11-05 1975-11-05 Method and apparatus for measuring non-linearity of quasi-linear systems

Publications (1)

Publication Number Publication Date
GB1515229A true GB1515229A (en) 1978-06-21

Family

ID=11000593

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4569176A Expired GB1515229A (en) 1975-11-05 1976-11-03 Method and apparatus for measuring the nonlinearity of quasi-linear systems

Country Status (5)

Country Link
DE (1) DE2649264C3 (en)
DK (1) DK144136C (en)
GB (1) GB1515229A (en)
HU (1) HU172706B (en)
NL (1) NL7612177A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003001221A1 (en) * 2001-06-25 2003-01-03 Koninklijke Philips Electronics N.V. Distortion detector

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1121496B (en) * 1979-12-14 1986-04-02 Cselt Centro Studi Lab Telecom PROCEDURE AND DEVICE FOR CARRYING OUT OBJECTIVE QUALITY MEASUREMENTS ON PHONE SIGNAL TRANSMISSION EQUIPMENT

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003001221A1 (en) * 2001-06-25 2003-01-03 Koninklijke Philips Electronics N.V. Distortion detector

Also Published As

Publication number Publication date
DE2649264B2 (en) 1980-04-30
DK144136C (en) 1982-06-01
NL7612177A (en) 1977-05-09
DE2649264A1 (en) 1977-06-08
DK144136B (en) 1981-12-14
DK498576A (en) 1977-05-06
DE2649264C3 (en) 1981-01-29
HU172706B (en) 1978-11-28

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Legal Events

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