Whistler XTR-105 User Manual

Page 7

Laser Facts

It’s well documented that many radar guns
cannot reliably provide the speed of a
targeted vehicle that is traveling in a group of
vehicles. In contrast, a laser gun can target a
specific vehicle out of a line of traffic and
determine its speed. The advantage of laser
over radar in terms of target identification 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, com-
pared with a laser transmission which covers
about 3 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 primary targets,
mounting your Whistler detector on the
dashboard can improve laser detection at short
range.

• Do not follow closely behind any vehicle you
cannot see through. If you can’t see past a
vehicle ahead of you, chances are your detector
won’t either.

• The receiving range of your laser detector
will not be the same as a radar detector. 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.

• Pro Laser

™

I II III

• LTI 20-20
• Ultra Lyte

Radar Facts

A radar gun operates by transmitting radio
waves at certain frequencies which reflect off
objects and are then picked up by the radar gun’s
receiving section. When a radar beam reflects
off a moving target, a measurable
frequency shift occurs. The radar unit converts
this shift into miles per hour to determine your
vehicle’s speed. Currently, the FCC (Federal
Communications Commission) permits
operation of traffic radar guns at X Band
(10.500 - 10.550 GHz), K Band (24.050 - 24.250
GHz), and Ka Band (33.400 - 36.000 GHz).

Note:

A radar detector will not alarm if an

officer is not transmitting on any one of the above
radar bands frequencies.

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:

• P

Paacciin

g - A patrol car drives behind you and

matches your driving speed.

• V

Vaassccaarr//A

Aiirrccrraafftt - The time it takes a vehicle

to travel a known distance is measured.

SPEED FACTS

Radar Detector Detectors (VG-2)

Spectre

The Interceptor VG-2, or simply VG-2,

is a microwave receiver used by police to
detect signals radiated by the local oscillator
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 16), 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 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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NOTE: Having a radar detector capable of
detecting the VG-2 may alert you to the pres-
ence of a speed trap. The newest tool
Police have to detect radar detectors is
called Spectre, as of this printing. Spectre
can detect most undetectable (VG-2)
laser/radar detectors on the market.