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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 (VG-2)
The Interceptor VG-2, or simply VG-2, is a microwave receiv-
er used by police to detect signals radiated by the local oscil-
lator of a radar detector. Because its purpose is to identify
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 page 25), 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, leav-
ing unsuspecting motorists vulnerable to receiving two tick-
ets — one potentially for speeding, the other for possession
of a detector.
Having a radar detector capable of detecting the VG-2 may
alert you to the presence of a speed trap.
For more information on speed monitoring technologies,
please visit our FAQ page on our website:
www.whistlergroup.com
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SPEED MONITORING TECHNOLOGIES
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Laser Facts
I t ’s well documented that many radar guns cannot re l i a b l y
p r ovide the speed of a targeted vehicle that is traveling in a
g r oup of vehicles. In contrast, a laser gun can target a spe-
cific vehicle out of a line of traffic and determine its speed.
The advantage of laser over radar in terms of target identifi-
cation is the result of the laser gun’s narrow beam. A radar
transmission can cover more than a four-lane highway at a
distance of 1,000 feet, compared with a laser transmission
which covers about 6 feet at the same distance.
For best protection, keep these points in mind:
• Because your vehicle’s license plate or headlights are the laser gun’s
p r i m a ry targets, mounting your Whistler detector on the dashboard can
i m p rove laser detection at short range.
• Do not follow closely behind any vehicle you cannot see through. If you
c a n ’t see past a vehicle ahead of you, chances are your detector won’t
e i t h e r.
• The receiving range of your laser detector will not be the same as a radar
d e t e c t o r. Laser guns are most often used at short range.
Whistler Laser/Radar detectors receive all current laser guns
which operate at a laser wavelength of 905 +/- 10mm.
• P ro Laser™ I II III
• LT1 20-20
• Ultra Ly t e
1670LD manual 4/11/02 11:48 AM Page 29