Non-interfering on-line receiver test system

Details Non-interfering on-line receiver test system Non-interfering on-line receiver test system

1974-04-10

1982-11-23

Bookbinder, Marc E.

Telecommunications

Receiver or analog modulated signal frequency converter

Measuring or testing of receiver

324 57N, H04B 1700

Patent

active

043609287

ABSTRACT:
An on-line noise figure measurement system for receivers that produces va results whether or not signals are being received. A narrow pulse having a low pulse repetition frequency and low amplitude is injected into the receiver. A processing circuit cyclically measures the output of the RF stage of the receiver to produce a ratio of two signal values. One value is measured in the absence of any signal entering the receiver while the other value is measured with only the pulse signal impressed on the receiver.

REFERENCES:
patent: 3736512 (1973-05-01), Gowan

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