Adaptive scanning method

Details Adaptive scanning method Adaptive scanning method

1988-09-06

1991-02-19

Olms, Douglas W.

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

455183, 455166, H03J 720

Patent

active

049950983

ABSTRACT:
A method (100) is provided for a radio that is currently monitoring a first frequency f(1) to determine whether carrier activity exists on a second frequency f(2). The radio loads f(2) into the synthesizer (102). After waiting 17 ms (103), the radio makes a first determination (104) whether the synthesizer is locked on f(2). After waiting 17 ms (105), the radio makes a second determination (106) whether the synthesizer is locked on f(2). If the first determination and the second determination are both affirmative (107), the radio determines (120) whether carrier activity exists on f(2). Otherwise, after waiting 17 ms (108), the radio makes a third determination (109) whether the synthesizer is locked on f(2). If the second determination and the third determination are both affirmative (110), the radio determines (120) whether carrier activity exists on f(2). Otherwise, if the third determination is affirmative (111), after waiting 17 ms (112), the radio determines (120) whether carrier activity exists on f(2). Otherwise, if the third determination is negative, the radio postphones (130) determining whether carrier activity exists on f(2).

REFERENCES:
patent: 4409688 (1983-10-01), Baker
patent: 4498194 (1985-02-01), Vandegraaf
patent: 4573210 (1986-02-01), Heck
patent: 4776037 (1988-10-01), Rozanski, Jr.

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