1976-11-18
1978-01-31
Claffy, Kathleen H.
H04J 314
Patent
active
040717003
ABSTRACT:
Apparatus for testing the operability of a signal translation means which passes signal information containing a definable and repeatable characteristic such as a synchronization signal through the use of a spare similar device and a demodulating device which provides outputs upon detecting the signal passed by each signal translating device. As illustrated, regular and spare transmit multiplexing devices are used and logic information obtained from a spare receiver is used to indicate a failed condition.
REFERENCES:
patent: 3476922 (1969-11-01), Yiotis
patent: 3873775 (1975-03-01), Chown
patent: 3940566 (1976-02-01), Jeppsson
Huffman Charles E.
McGuire Robert J.
Waddill John W.
Claffy Kathleen H.
Crawford Robert J.
Humphries L. Lee
Lutz Bruce C.
Popek Joseph A.
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