Pulse or digital communications – Repeaters – Testing
Patent
1984-07-06
1988-12-27
Safourek, Benedict V.
Pulse or digital communications
Repeaters
Testing
375 70, 375 71, 375 98, 455 58, 455 73, 455245, 455116, H04B 104, H04B 350, H04L 2702
Patent
active
047946202
ABSTRACT:
A radio frequency modulator/demodulator (modem) and method for receiving and transmitting data over a radio frequency data link. The modem has a transmitting section which includes a modulator which modulates a radio frequency signal in response to data provided by, for example, an associated processor. The transmitting section further includes a watchdog or enable circuit which monitors a request-to-send signal produced by the associated processor, with the request-to-send signal being present when the processor is generating data to be transmitted over the data link. The enable circuit will disable the modulator should a transmission exceed a maximum predetermined time period, thereby preventing the associated processor from monopolizing the data link in the event of a processor failure.
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Coupland Richard P.
Moore John R.
International Anasazi, Inc.
Safourek Benedict V.
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