Telecommunications – Carrier wave repeater or relay system – With frequency conversion
Patent
1981-08-25
1989-05-09
Safourek, Benedict V.
Telecommunications
Carrier wave repeater or relay system
With frequency conversion
455 35, 455 45, 455228, H04B 110
Patent
active
048295884
ABSTRACT:
A transceiver and method of controlling the automatic retransmission of a radio frequency commmunications signal in which a pilot tone within the radio frequency communications channel bandwidth but above the band of frequencies necessary for intelligence is phase modulated at a frequency below the frequency band of the intelligence and combined with the intelligence for transmission over a first frequency communication link. When received, the presence of the pilot tone and the modulation is detected, compared with predetermined standards and utilized to control the application of the demodulated intelligence to a second communication link. After establishing the second communication link, the predetermined standards utilized to control the application of the intelligence to the second communication link are relaxed.
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Rudolf F. Graf, Modern Dictionary of Electronics, Howard W. Sams & Co., Inc., 1977, pp. 50, 358, 367, 801.
Dauben, Dennis, "Miniature Solid State Tone Encoders to Replace Reeds," CQ, Dec. 1975, pp. 42-45.
Harris Corporation
Safourek Benedict V.
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