Scan-lock control of solid state digitally synthesized receivers

Details Scan-lock control of solid state digitally synthesized receivers Scan-lock control of solid state digitally synthesized receivers

1979-04-16

1981-06-30

Ng, Jin F.

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

455161, 455349, 455352, H04B 116, H03J 718

Patent

active

042766540

ABSTRACT:
A scan-lock control device is provided for use with a high frequency receiver in a manner which adds frequency scanning and lock-up functions to the receiver without affecting any of the receiver's other functions. The scan-lock control incorporates an interface unit which can be operatively connected to the receiver to interconnect scanning and lock-up circuits to the receiver. The scan-lock device also incorporates a novel multiplexer unit which is modular and expandable and has a plurality of plug-in cards operatively associated therewith; each card having programmed thereon a frequency data channel which may be selectively scanned.

REFERENCES:
patent: 2238391 (1941-04-01), Masters
patent: 3449749 (1969-06-01), McEvoy
patent: 3803494 (1974-04-01), Howell et al.
patent: 3886453 (1975-05-01), Quintiliani et al.
"SBE Opti/Scan", printed 8-1976.
Radio Electronics, May 1973 on "Heath's Digital FM Tuner", pp. 42-45, 50, 98.
"Scan-Lock Control of Digitally Synthesized Receivers" by Nations et al., 4/28/1976.
"Station-Memory Component for the 77 Super-Colour Series", by Clas, 1976.

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