Alert Periscopes - Whistler GT-438G Owner's Manual

OPERATION
Signal Strength Display
When a radar signal is detected the audio alerts have a geiger
counter-like pattern to help you determine the strength of the
radar source; the faster the beeping the stronger the radar
signal. At the same time the audio is reporting, the display
illuminates the band identification Icon and relative signal
strength from 1 to 9.
1 = weak signal, 9 = strong signal

Alert Periscopes

Whistler's Alert Periscopes provide an added attention
getting visual alert. The two extra LEDs flash on and off when
the unit alarms to provide a unique visual alert. This alert can
be programmed, through the Option Select Mode to:
1. flash for all alarms
2. remain on
3. turn LEDs off completely
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