Apollo VP200, Руководство пользователя

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SCAN OPERATION
Priority Scan
If the VP200 is programmed for priority scan, the frequency
programmed as F1 is designated as the priority channel. If there
is no traffic on F1, the VP200 alternately listens to F1 and F2
until a transmission is detected. If a transmission is detected on
F1, the VP200 stays on that channel until the transmission ceases.
The VP200 only decodes tones on the F1 channel. No tones are
decoded on the F2 channel.
If the VP200 detects a transmission on F2 it stops on F2 then
listens for transmissions on F1. Scan back time is programmable
and can be set to 0.5, 1, or 2-second increments. If a transmission
is detected on F1, the VP200 switches to F1 cutting off any
transmission on F2. When switching from F2 to F1, the VP200
listens for any tones and alerts if the proper tones are detected.
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