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SPEED MONITORING TECHNOLOGIES
more than a four-lane highway at a distance of 1,000 feet,
compared with a laser transmission which covers about 3 feet at
the same distance. For best protection, keep these points in mind:
• 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 • LT1 20-20 • Ultra Lyte
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, Spectre
The Interceptor VG-2, or simply VG-2, is one type of 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, these devices are known
as a “radar detector detector”(RDD).
An RDD is the primary tool used by the police to identify radar
detector equipped vehicles. If caught in a state or country where
detectors are illegal, (see page 21), drivers risk losing their
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SPEED MONITORING TECHNOLOGIES
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Radar Facts
A radar gun operates by transmitting radio waves at certain
frequencies which reflect off objects and are 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.
POP
™
Mode
POP
™
Mode is a feature on some newer radar guns operating
on K and Ka bands. When the gun is in POP
™
Mode and
activated, a brief burst of energy, less that 1/15 of a second,
is transmitted and the vehicle’s speed is quickly acquired. A
detector without POP
™
Mode detection capability cannot
respond to this brief transmission.
Total Band Protection
™
Complete Band Coverage that detects laser, radar, VG-2
and safety radar bands.
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 gun’s transmission can cover