Telecommunications – Receiver or analog modulated signal frequency converter – Signal selection based on frequency
Patent
1980-05-28
1985-06-04
Chin, Tommy P.
Telecommunications
Receiver or analog modulated signal frequency converter
Signal selection based on frequency
455166, 455168, H03J 718
Patent
active
045219150
ABSTRACT:
A scanning radio receiver intended for use on the frequencies assigned to the Public Safety Radio Services and which is also operable for reception in the aircraft band from 118 MHz to 136 MHz. A ROM contains data establishing frequency limits and other information such that frequencies assigned to a number of service categories can be automatically searched in response to operation of service keys of a keyboard with the information storage requirements being minimized. For a service band having single frequencies or groups of frequencies which are not separated by fixed frequency increments, the data identifies the number of such frequencies or groups, the number of frequencies in each and a limit frequency of each. A processor outputs a frequency code to a frequency synthesizer while also processing input and stored data to develop the next code to be output.
REFERENCES:
patent: 3725788 (1973-04-01), Fathauer
patent: 3961261 (1976-06-01), Pflasterer
patent: 3962644 (1976-06-01), Baker
patent: 4081752 (1978-03-01), Sumi
patent: 4092594 (1978-05-01), Baker
patent: 4114103 (1978-09-01), Pflasterer
patent: 4123715 (1978-10-01), Fathauer
patent: 4135158 (1979-01-01), Parmet
patent: 4270217 (1981-05-01), Baker
Baker William
Beach Xio I.
Sallee Gary F.
Smith Gordon H.
Stein Jeffrey I.
Chin Tommy P.
Masco Corporation of Indiana
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