Method and apparatus for measurement of attenuation and distorti

Details Method and apparatus for measurement of attenuation and distorti Method and apparatus for measurement of attenuation and distorti

1979-10-24

1981-06-23

Atkinson, Charles E.

Boots, shoes, and leggings

364485, 364726, 324 57DE, 1791753R, 455 67, H04B 346

Patent

active

042754461

ABSTRACT:
A method for measurement of transmission characteristics consists of supplying a test pulse to an object under test and measuring the pulse at the output of the object under test with the assistance of Fourier analysis. The test pulse is made up of a plurality of components which are equally spaced apart in frequency, and the initial phase values of each of the components are chosen so as to reduce loading of the object under test to an acceptable level. Evaluation of the test pulse at the output of the object under test yields attenuation and phase shift characteristics for each component frequency.

REFERENCES:
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patent: 3846593 (1974-11-01), Bradley
patent: 3887775 (1975-06-01), Montefusco et al.
patent: 3952189 (1976-04-01), Fabricius
patent: 3973112 (1976-08-01), Sloane
patent: 4039769 (1977-08-01), Bradley
patent: 4067060 (1978-01-01), Poussart et al.
patent: 4093988 (1978-06-01), Scott
patent: 4093989 (1978-06-01), Flink et al.
"Transfer Function Measurement Using Fast Pulses", by R. C. French, published in Electronic Engineering, Aug. 1966, pp. 516-519.
"Measuring Waveform Distortion With a PAR Meter", by W. T. Cochran, published in Bell Lab Record, Oct. 1965, pp. 369-371.
CCITT Recommendation, Recommendation 0.81, vol. IV.2, pp. 44-50.

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