Telecommunications – Transmitter and receiver at same station – With frequency stabilization
Patent
1985-03-04
1987-08-18
Griffin, Robert L.
Telecommunications
Transmitter and receiver at same station
With frequency stabilization
455151, 455186, 455345, H04B 140, H04B 1116, H04B 106
Patent
active
046882618
ABSTRACT:
A frequency synthesized multichannel radio apparatus comprising a synthesized tranceiver and a remotely mountable control unit. All the possible channel frequencies available to users in a large geographical area are stored in a PROM mounted in the transceiver said PROM serving as a look-up table. The addresses of those channel frequencies in the PROM which are available to a particular user are stored in an electrically alterable storage means, such as an EAROM or a E.sup.2 PROM, contained in the control unit. In normal operation a channel selector in the control unit selects a particular channel in the electrically alterable storage means which in turn reads-out addresses of predetermined locations in the PROM which supplies data for example synthesizer divide numbers to the frequency synthesizer. If the channel frequencies available to a user have to be changed then with the apparatus remaining in situ a data transfer unit which has been preprogrammed with the addresses of the new channel frequencies is connected to the electrically alterable storage means and the new sequence of channel frequency addresses is stored therein.
REFERENCES:
patent: 3940702 (1976-02-01), Yoshimura et al.
patent: 4147984 (1979-04-01), Caudel et al.
patent: 4254504 (1981-03-01), Lewis et al.
patent: 4267597 (1981-05-01), Volpi et al.
patent: 4503513 (1985-03-01), Pogue, Jr.
Killoway James M.
Sparks Geoffrey S.
Stubbings David J.
Briody Thomas A.
Griffin Robert L.
Kuntz Curtis
Oisher Jack
Streeter William J.
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