background image

• Check fuse for lighter socket; replace if 

necessary.

• Make sure lighter socket is clean.

PROBLEM:  Unit alarms when vehicle hits
bumps.

• Make sure batteries are seated properly.
• Make sure that the battery door is fully closed.
• Make sure battery contacts are clean.
• Check for loose lighter socket; tighten and 

clean.

• Check connections at both ends of power 

cord. Substitute another cord to determine if 
cord is defective. Return defective cord to 
the factory.

PROBLEM:  Audio alerts are not loud
enough.

• Cancel Auto Quiet Mode or City Mode.
• Check audio level setting. 

(see pages 7-8 )

PROBLEM:  Low Battery Life.

• One or more of the batteries may be 

defective.

• See the battery life tips on page 6.
If difficulties occur which cannot be solved by 
information in this Troubleshooting Guide, please
call Whistler Customer Service at 1-800-531-0004
or visit our FAQ page at
www.

whistlergroup

.com/faq-detectors.asp,

before returning your unit for service.

PROBLEM:  Unit turns itself off

• See Auto Shut Off Mode feature on page 12.

TROUBLESHOOTING

Care And Maintenance

During the summer months, avoid prolonged
exposure to direct sunlight by removing your unit
from the dash when your vehicle is parked for an
extended period of time.  Do not spray water,
cleaners, or polishes, directly onto the unit.  The
spray may penetrate through the openings and
damage the unit.  Also, do not use any abrasive
cleaners on the unit’s exterior.
As with all battery operated devices remove the
batteries when this unit will not be used for an
extended period of time. Damage caused by
leaky or improperly charged batteries are not
covered under warranty. Check with the battery
manufacturer about the specific battery warranty.

ARE DETECTORS LEGAL?

In Most States YES!

Laser-Radar detectors are legal in every state for
automobiles and light trucks (under 10,000 lbs.)
except Virginia and Washington, D.C., which
have local regulations restricting the use of
radar receivers in any vehicle. 

The Federal Highway Administration (FHWA)
passed a nationwide regulation, effective
January 1994, which prohibited radar and laser
detector use in vehicles over 10,000 lbs.

CARE AND MAINTENANCE

FCC ID : HSXWH15

This device complies with part 15 of the FCC Rules.
Operation is subject to the following two conditions: 
(1) This device many not cause harmful
interference, and
(2) this device must accept any interference
received, including interference that may cause
undesired operation.

Important:

FCC requirements state that

changes or modifications not expressly approved

by Whistler could void the user’s authority to

operate the equipment.

SPEED MONITORING

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 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. 

FCC INFORMATION

17

18

19

Summary of Contents for XTR-420

Page 1: ...20 21 Other Speed Detection Systems 21 22 Warranty Information 22 25 Specifications 25 Accessories 26 Dear Whistler Detector Owner If you have questions concerning the operation of this Whistler prod...

Page 2: ...he vehicle s owner s manual supplied with your vehicle to determine if your windshield has this coating Avoid placing unit in direct contact with the windshield To reduce the possibility of theft unpl...

Page 3: ...slowly charge the rechargeable batteries This will also provide power to the detector The display will dimly blink the I II II I icon when the unit is charging the batteries When the power cable is r...

Page 4: ...nitial alarm of two beeps and then remains quiet unless the signal becomes very strong When the signal strength increases two additional beeps are provided City 1 and City 2 Modes operate the same as...

Page 5: ...in 3 5 seconds an alarm sounds and multiple scrolling icons will appear on the display Press Power to cancel Stay Alert WARNING Stay Alert is NOT intended as a substitute for adequate rest You should...

Page 6: ...lerting then suddenly a VG 2 signal is detected the VG 2 warning will override the X band alert POP MODE ALERTS POP Mode Alerts Because POP Mode radar utilizes the same K or Ka band frequencies POP Mo...

Page 7: ...E DETECTORS LEGAL In Most States YES Laser Radar detectors are legal in every state for automobiles and light trucks under 10 000 lbs except Virginia and Washington D C which have local regulations re...

Page 8: ...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 detect...

Page 9: ...n your unit as outlined in the section Service Under Warranty along with a certified check or money order for 55 00 Payment may also be made by MasterCard VISA or American Express personal checks are...

Reviews: