Telecommunications – Receiver or analog modulated signal frequency converter – Signal selection based on frequency
Patent
1989-07-21
1992-12-08
Kuntz, Curtis
Telecommunications
Receiver or analog modulated signal frequency converter
Signal selection based on frequency
4551861, H04B 116
Patent
active
051704978
ABSTRACT:
A frequency tuning method and apparatus for a broadcast receiver adapted to receive standard and offset broadcast channel frequencies. Each standard channel frequency is stored in a memory as representative data. Also stored are offset frequencies which are generated as a result of the receiver tuner searching for a channel and finding an offset channel. When a channel is selected, if there is an offset stored, the standard frequency plus the offset is applied to the tuning circuitry. If no offset is stored or if no signal is received strongly when the latter operation is performed, the tuner is tuned to the standard channel frequency. If no corresponding frequency is received strongly enough or if one is received but the system is not adequately tuned to it, the system alters its tuning frequency in discrete steps until it is tuned to a received channel frequency. The difference between the standard frequency and the tuned frequency is then stored as an offset frequency.
REFERENCES:
patent: 4679246 (1987-07-01), Jeng
patent: 4723302 (1988-02-01), Fulmer et al.
Kuntz Curtis
Pioneer Electronic Corporation
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