Circuit arrangement for determining the frequency dependent ampl

Details Circuit arrangement for determining the frequency dependent ampl Circuit arrangement for determining the frequency dependent ampl

1977-02-22

1979-11-27

Griffin, Robert L.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Frequency of cyclic current or voltage

325363, 325 67, 324 79D, 340160, H04B 162

Patent

active

041763173

ABSTRACT:
A circuit arrangement for correcting and controlling the attenuation characteristic of a communications transmission link by using adjustable attenuators in which a measuring transmitter produces a measuring signal of constant amplitude and at a frequency which is variable within the transmission frequency band and the signal is fed to an analysis device after passing through the communication transmission link so as to establish its frequency dependent amplitude variations and wherein the individual adjusting elements of the attenuators are consecutively actuated such that the amplitude variation in each case reaches a minimum value and the measuring transmitter can be consecutively switched to a series of individual frequencies which lie in frequency gaps between individual communication transmission channels and wherein digital storage means are utilized and wherein a rectifier produces a voltage which indicates the frequency dependent amplitude fluctuations of the signal to be measured.

REFERENCES:
patent: 2967998 (1961-01-01), Hurvitz
patent: 2972108 (1961-02-01), Stone, Jr.
patent: 3415952 (1968-10-01), Blackburn et al.
patent: 3456191 (1969-01-01), Rodenburg et al.
patent: 3559068 (1971-01-01), Aimering
patent: 3654554 (1972-04-01), Cook
patent: 3732496 (1973-05-01), Boyer
patent: 3895298 (1975-07-01), Schollmeier
patent: 3978408 (1976-08-01), Cupta et al.
patent: 4007360 (1977-02-01), Kniel et al.

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