Method of testing transceiver and transceiver including testing

Details Method of testing transceiver and transceiver including testing Method of testing transceiver and transceiver including testing

1980-07-17

1982-11-30

Safourek, Benedict V.

Telecommunications

Transmitter and receiver at separate stations

Having measuring, testing, or monitoring of system or part

375 7, 375 10, 455115, 455 73, H04B 1700

Patent

active

043619045

ABSTRACT:
An ultra high frequency transceiver which transmits a modulated carrier wave and mixes a received signal with a locally generated signal to produce an intermediate frequency signal is tested by using the same transmitter as used during normal transceiver operation and by modulating the carrier with a wave having sudden transitions. A portion of the transmitted wave is reflected back to a receiver segment of the transmitter to produce an i.f. signal that is detected by a demodulator. Each transition causes the demodulator to detect a pulse signal. In response to the pulse signal being detected and not being detected during a testing interval, indications are derived to signal that the transceiver is and is not operating properly, respectively.

REFERENCES:
patent: 2561363 (1951-07-01), Haeff et al.
patent: 2922130 (1960-01-01), Matheson
patent: 3324472 (1967-06-01), Sundberg
patent: 3478317 (1969-11-01), Hales
patent: 3500459 (1970-03-01), Battin et al.
patent: 3665481 (1972-05-01), Low et al.
patent: 3970940 (1976-07-01), Venn
patent: 4048564 (1977-09-01), Gleeson, Jr.
patent: 4072900 (1978-02-01), Ray

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