1976-05-28
1978-09-12
Griffin, Robert L.
325464, 325458, 325455, H04B 132, H04B 106
Patent
active
041141032
ABSTRACT:
A scanning FM monitor receiver is disclosed which is of the superheterodyne type and is capable of scanning and receiving a plurality of channels on a plurality of bands. The receiver incorporates a phase-locked-loop frequency synthesizer whih eliminates the need for crystals for every channel. The input data that the synthesizer requires to develop the individual preselected frequencies is provided by a random access memory that is programmed by the user for the frequencies desired. In one embodiment, decimal frequency information is entered on a numerical keyboard and converted into binary form for programming the memory. Indicator lamps on the receiver illuminate when a channel is being scanned and also provide a visual accuracy check when an operator programs the random access memory.
REFERENCES:
patent: 3824475 (1974-07-01), Pflasterer
patent: 3864637 (1975-02-01), Kanow
patent: 3882400 (1975-05-01), Hamada
patent: 3902121 (1975-08-01), Yoshino et al.
patent: 3931578 (1976-01-01), Gittinger
patent: 3962644 (1976-06-01), Baker
Griffin Robert L.
Masco Corporation of Indiana
Psitos Aristotelis M.
Redman Leon E.
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