Pulse or digital communications – Repeaters – Testing
Patent
1979-12-31
1982-01-19
Safourek, Benedict V.
Pulse or digital communications
Repeaters
Testing
375 80, 375103, 455 29, 455 42, H04L 706
Patent
active
043120725
ABSTRACT:
Radio transmission system in which the carrier frequency oscillator at the transmitter is wobbulated by varying its frequency in a periodic manner and modulated and transmitted to a receiving site where the detected signal is passed through two separate paths, one being supplied to a converter and the other is supplied to the converter through a delay line. The output of the converter comprises an intermediate frequency which contains the modulation which is then demodulated and detected. Modification of the invention provides for transmitting two or more separate intelligences on the carrier and detecting the two intelligences at the receiver.
REFERENCES:
patent: 2833857 (1958-05-01), Robin
patent: 3387220 (1968-06-01), Lender
patent: 3484693 (1969-12-01), Fong
patent: 3679983 (1972-07-01), Theriot
patent: 4064361 (1977-12-01), Kustka
patent: 4209750 (1980-06-01), Freitas
Chin Stephen
Safourek Benedict V.
Siemens Aktiengesellschaft
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