Whistler 1655 - Manual (Page 22)

SPEED MONITORING TECHNOLOGIES
Other Speed Detection Systems
Several techniques other than radar or laser are used to
measure vehicle speeds. When these methods are being
used, no detector can provide a warning. These techniques
include:
• Pacing - A patrol car drives behind you and matches your
driving speed.
• Vascar/Aircraft - The time it takes a vehicle to travel a
known distance is measured.
Radar Detector Detectors
The Interceptor VG-2, or simply VG-2, is a microwave receiv-
er used by police to detect signals radiated by the local
oscillator of a radar detector. Because its purpose is to iden-
tify persons driving with radar detectors, the VG-2 is known
as a “radar detector detector”.
The VG-2 is the primary tool used by the police to identify
radar detector equipped vehicles. If caught in a state where
detectors are illegal (see pg. 18), drivers risk losing their
radar detector and receiving a fine. In addition, instant-on
radar is almost always used in combination with a VG-2,
leaving unsuspecting motorists vulnerable to receiving two
tickets — one potentially for speeding, the other for pos-
session of a detector.
Having a radar detector capable of detecting the VG-2 may
alert you to the presence of a speed trap.
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