Swept frequency circuit for precision gain or loss measurements

Details Swept frequency circuit for precision gain or loss measurements Swept frequency circuit for precision gain or loss measurements

1978-06-12

1980-04-15

Rolinec, Rudolph V.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Frequency of cyclic current or voltage

324121R, G01R 2700, G01R 1320

Patent

active

041985982

ABSTRACT:
A swept frequency circuit for use with several detectors and an oscilloscope is described, the output of which is controlled remotely by an electronic attenuator. A closed feedback loop is formed by a detector rectifying the swept output frequency as it is swept from low to high frequency during one half of the sweep cycle (determined by the sweep rate). This recitified signal is processed through switchable attenuators or resistors and applied to the electronic attenuator so as to decrease the output of the swept frequency signals. In particular, the switchable attenuators or resistors can be arranged to produce an upper and lower calibration trace, forming a "window" of, for example, .+-.1 dB, as well as several test traces so that several events may be measured simultaneously in the "window".

REFERENCES:
patent: 2563395 (1951-08-01), Carpentier

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