Apparatus for testing linearity of an FM transmitter

Details Apparatus for testing linearity of an FM transmitter Apparatus for testing linearity of an FM transmitter

1982-04-16

1983-10-25

Bookbinder, Marc E.

Telecommunications

Transmitter and receiver at separate stations

Having measuring, testing, or monitoring of system or part

324 77B, 324118, 455115, H04B 1700

Patent

active

044123485

ABSTRACT:
An FM transmitter linearity test equipment includes an amplitude modulation generator signal source producing an amplitude modulated signal of known varying amplitudes changing at a known rate and a demodulator for demodulating the resulting frequency FM signal from the transmitter. The test equipment also includes a commutating filter operating at said known rate and which is receptive of the demodulated signal for producing a signal of varying amplitude which is compared with the signal produced by the signal source to determine the linearity of the FM transmitter.

REFERENCES:
patent: 2499755 (1950-03-01), Hunt
patent: 3379975 (1968-04-01), Niedereder
patent: 3379976 (1968-04-01), Niedereder
patent: 3693076 (1972-09-01), Nugent et al.
patent: 3736510 (1973-05-01), Wu
patent: 3992670 (1976-11-01), Gittins et al.
patent: 4001695 (1977-01-01), Hrbacek et al.
patent: 4074191 (1978-02-01), Jules
patent: 4122391 (1978-10-01), Harp et al.
"Innovations in Microwave Radio Self-Test Systems"-Alistair W. Taylor Oct. 5-7, 1981; Int'l Electrical and Electronics Conference and Exposition, Toronto, Canada, Paper No. 81083.

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