Beltronics USA G8M3 Radar Detector User Manual STi Manual
Beltronics USA Inc Radar Detector STi Manual
Manual

BELTRONICS
5442 West Chester Road
West Chester OH
45069 USA
USA 800-341-2288
Canada 800-268-3994
www.beltronics.com
©2005 BELTRONICS
Made in Canada
Features, specifications and prices subject to change without notice.
Model: STi DRIVER
DIGITAL RADAR•LASER•SAFETY DETECTOR
Owner’s Manual
MAGNESIUM
CONSTRUCTION
STi Manual 3/28/05 3:39 PM Page 1

The Bel STi is the most advanced radar, laser
and safety detector ever designed by
Beltronics.
The Bel STi includes full X, K,
SuperWide Ka, and Safety Warning System
radar capability, front and rear laser
detection, dual LNA (low noise amplifier)
microwave receiver, digital signal
processing (DSP) for superior range and
reduced false alarms, our patented Mute and
AutoMute, audible and visual band alerts,
and all the performance you’d expect from
Beltronics.
In addition, the Bel STi introduces the
follow revolutionary features:
• New dual LNA (low noise amplifier)
receiver provides the longest
possible warning against all radar
threats.
• New TotalShield™RF Technology
provides zero leakage for the
ultimate in undetectability.
• New programmable Alert Lamp
provides additional visual indication
of alerts.
• New rigid magnesium case provides
the ultimate protection for your
investment.
• New high and low voltage warning is
given any time the vehicle’s voltage
drops below 10.5 volts, or goes
above 16.5 volts.
• Easy-to-use Programming lets you
customize up to 8 features
• Exclusive AutoScan mode
intelligently reduces unwanted false
alarms, plus Highway and City
settings
• Ultra-bright text-display provides
easy to read information from any
angle
• New Tech Display provides actual
numeric radar frequency for any
radar signal
• New Programmable Bands (on/off).
• Detects and decodes up to 64 Safety
Warning System messages
• Includes new coiled and direct-wire
SmartPlug, which provides a
convenient mute button right on the
plug.
If you’ve used a radar detector before, a
review of the Quick Reference Guide on
pages 4 and 5, and the Programming
information on pages 12 and 13 will briefly
explain the new features.
If this is your first detector, please read
the manual in detail to get the most out of
your STi’s outstanding performance and
innovative features.
Please drive safely.
Congratulations Quick Reference Card
1Programming Details ̈
BEL STi Quick Reference Card
̄Remove card along perforations ̄
̄Remove card along perforations ̄
An example
Here is how you would turn the STi’s
AutoMute feature off.
1Enter the Program Mode by holding both
the VOLUME/MUTE and SENS buttons
down for 2 seconds. The STi will beep
twice and display Program.
2Then hold the RVW button down. The
STi will scroll through the categories,
starting with power-on indication
(Pilot), then alert lamp (Alamp), Voice,
Power-on sequence, signal strength meter,
and then AutoMute.
3Release the RVW button when the STi
shows the AutoMute item. Since the
factory setting is for AutoMute to be on,
the STi will display aMute ON .
(If you accidentally don’t release the
Review button in time, and the STi goes to
the next category, hold the RVW button
down again, and scroll through the
categories again until aMute is displayed.)
4Press the CHG button to change from
aMute ON to aMute OFF.
5To complete the Programming, simply
wait 8 seconds without pressing any button.
The STi will display Complete, beep 4
times, and return to normal operation.
There are 8 user-selectable options so you
can customize your STi for your own
preferences.
The buttons labeled VOLUME/MUTE
and SENS are also used to enter the Program
Mode, REVIEW your current program
settings, and to CHANGE any settings as
desired. The abbreviations PGM, RVW, and
CHG are located on the lower part of the
display lens and are highlighted in graphics.
How to use Programming
1To enter Program Mode, press and
hold both VOLUME/MUTE and SENS
buttons down for 2 seconds. (The unit
will beep twice, and will display the word
“Program”).
2Then press the RVW button to review
the current settings. (You can either tap
the button to change from item to item, or
hold the button to scroll through the items).
3Press the CHG button to change any
setting. (You can either tap the button to
change from setting to setting, or hold the
button to scroll through all the options).
4To leave Program Mode, simply wait
8 seconds without pressing any button.
(The unit will display Complete, beep 4
times, and return to normal operation).
Factory Default Settings
To reset the STi to its original factory
settings, press and hold the
“VOLUME/MUTE,” and “SENS,” buttons
while turning the power on. The STi’s
display will provide a “Reset” message,
accompanied by an audible alert,
acknowledging the reset.
FCC Note: Modifications not expressly
approved by the manufacturer could
void the user’s FCC granted authority to
operate the equipment.
STi Manual 3/28/05 3:39 PM Page 3

Table of Contents
Quick Reference Guide 4-5
Installation 6-7
• Power Connection 6
• Mounting Location 6
• Windshield Mount 7
Controls and Features 8-11
• Power and Volume Control 8
• Power-on indication 8
• Voice 8
• AutoMute 8
• Mute 8
• Sensitivity Button 9
• Brightness 9
• Audible Alerts 10
• Power Connector 10
• Signal Strength Meter 11
• Threat Display 11
• Tech Display 11
Programming 12-16
• How to use Programming 12
• Example of Programming 12
• Overview of Programming 13
• Details of Programming 14-16
Technical Details 17-23
• Specifications 17
• Interpreting Alerts 18-19
• How Radar Works 20
• How “POP” Works 20
• How Laser Works 21
• How TotalShield Technology Works 22
• How Safety Radar Works 22-23
Service 24-29
• Troubleshooting 24-25
• Service 26
• Registration 27-28
• Warranty and Accessories 29
32
Quick Reference Card
BEL STi Quick Reference Card
* Factory Default Settings
̄Remove card along perforations ̄
̄Remove card along perforations ̄
Press the RVW button
to go from one category
to the next
PILOT
(Power-on indication)
ALERT LAMP
VOICE
POWER-ON SEQUENCE
SIGNAL STRENGTH METER
AUTOMUTE
BRIGHTNESS
BANDS
Pilot HWY
Pilot H
Pilot V
Alamp ON
Alamp OFF
Voice ON
Voice OFF
PwrOn STD
PwrOn FST
Meter STD
Meter THT
Meter TEC
aMute ON
aMute OFF
Brt Auto
Brt Min
Brt Med
Brt Max
Brt Dark
Bands DFT
Bands MOD
XON
or OFF (default is on)
KONor OFF (default is on)
Ka ON or OFF (default is on)
POP ON or OFF (default is off)
LSR ON or OFF (default is on)
SWS ON or OFF (default is off)
Press the CHG button
to change your setting
within a category
* Full word: Highway or AutoScan or City
Letter: H or A or C
Vehicle voltage
* Alert lamp on
Alert lamp off
* Voice alerts on
Voice alerts off
* Standard power-on sequence
Fast power-on sequence
* Standard signal strength meter
Threat Display
Tech Display
* AutoMute on
AutoMute off
* Automatic brightness
Minimum brightness
Medium brightness
Maximum brightness
All dark
* Factory default settings
Factory default settings modified
Turn bands “ON” or “OFF” by
pressing the “SENS” button
STi Manual 3/28/05 3:39 PM Page 5

Radar Antenna and Laser Lens
The rear panel of your STi should have a
clear view of the road ahead. For best
performance, do not mount the STi
directly behind windshield wipers
or tinted areas. Page 6
Alphanumeric Display
The STi’s display will show Highway,
AutoScan, or City as its power-on indication.
If you prefer, you can choose other power-
on indications. Pages 12-14
During an alert, the display will indicate
radar band, and a precise bar graph of signal
strength. Page 10
Note: In the Dark Mode the display will
not light during an alert. Page 9
Quick Reference Guide
To begin using your STi,
just follow these simple steps
1Plug the small end of the power cord
into the side jack of the detector, and
plug the large end of the power cord
into your vehicle’s lighter socket.
2Mount your STi on the windshield
using the supplied windshield mount.
3Press the PWR button, located on the
left side of the front panel, to turn the
STi on.
4Press and hold the VOLUME/MUTE
button to adjust the volume level.
Please read the manual to fully understand
STi’s operation and features.
QuickMount Slot
Insert STi’s adjustable Windshield mount
into this slot. Page 7
QuickMount Button
Press the button, and slide the Windshield
mount into one of its four locking positions.
Page 7
Power
Press the PWR button to turn the STi on or
off.
AutoMute
STi’s patented AutoMute automatically
reduces the volume level of the audio alert
after a brief period. If you prefer, you can
turn AutoMute off. Page 8
Programming
The STi is ready to go, just plug it in and
turn it on. But you can also easily change 9
features for your preferences. Pages 12-16
4
Rear Laser Port
Receives laser signals from behind the
vehicle.
Power Jack
Plug the power cord into this connector.
Page 6
Earphone Jack
Accepts standard 3.5mm earphone.
VOLUME/MUTE Button
Press and hold the VOLUME/MUTE button
(below the display) to adjust the alert
volume level.
Briefly press this button to silence the
audio for a specific alert. (The audio will
alert you to the next encounter.) Page 8
Sensitivity Button (SENS)
Switches between Highway, AutoScan, City
and City NoX settings. In general, we
recommend the AutoScan mode. Page 8
5
STi Manual 3/28/05 3:39 PM Page 7

Power Connection
To apply power to the STi, plug the small
end of the power cord, (telephone-type
connector) into the modular jack on the
STi’s right side, and plug the lighter plug
adapter into your vehicle's lighter socket or
accessory socket.
Your STi operates on 12 volts DC negative
ground only. The lighter plug provided is a
standard size and will work in most
vehicles. However, some vehicles may
require the optional European sleeve to
ensure a snug fit. If so, simply call our
service department to order one. This
sleeve slides over the Power cord’s lighter
plug adapter. Of course, your lighter socket
must be clean and properly connected for
proper operation.
Mounting Location
Where to mount STi
For optimum detection performance, we
recommend the following:
• Using the Windshield QuickMount, mount
your STi level, and high enough on your
front windshield to provide a clear view of
the road from the front and rear.
• Mount the STi away from windshield
wipers, other solid objects, and heavily
tinted areas that might obstruct the radar
antenna or laser lens.
6
Installation
Windshield QuickMount
The STi’s QuickMount windshield bracket is
designed for unobtrusive and hassle-free
mounting.
1Depress the adjustment button on the
top of the STi (by the word BELTRONICS)
and slide the QuickMount bracket into the
slot until it is locked into the position which
best fits the angle of your windshield (there
are four settings available). For extremely
horizontal or extremely sloped windshields,
the QuickMount bracket can be bent.
To ensure that the suction cups
adhere to the windshield firmly,
be sure to keep both your
windshield and the suction cups clean.
2To adjust the STi on your windshield,
use the QuickMount adjustment button
located on the top of the STi, and slide the
STi forward or backward to obtain a level
position.
When installed and adjusted properly, the
back top edge of the STi should rest solidly
against your windshield.
User’s Tip
You can leave the QuickMount bracket in
place on your windshield, and easily
remove STi by pressing the adjustment
button and sliding the STi off the mount.
Again, be sure to position the bracket
where it won’t present a hazard in the event
of an accident. Additional mounts are
available.
7
N0TE: Depending on your vehicle, the
lighter socket power may either be
continuously on, or it may be switched
on and off with your ignition switch.
CAUTION: A few vehicles (including some
Porsches) have windshields with a soft
anti-lacerative coating on the inside
surface. Use of suction cups will
permanently mar this coating. Consult
your dealership or the vehicle owner’s
manual to determine if your windshield
has this coating.
WARNING: BELTRONICS cannot
anticipate the many ways STi can be
mounted. It is important that you mount
STi where it will not impair your view
nor present a hazard in case of an
accident.
STi Manual 3/28/05 3:39 PM Page 9

Controls and Features
Power
To turn STi on or off, press the PWR button
located on the front left side. When you
turn STi on, it goes through a sequence of
alerts.
If you prefer, you may program your
STi for a shorter power-on sequence. See
the Programming section for details.
Volume
Press and hold the VOLUME/MUTE button,
located in the center of the front panel, to
adjust the STi’s alert volume level. The
audio will ramp up and down, accompanied
by a bar-graph on the display. Once you’ve
reached your preferred audio level, simply
release the button.
Power-on indication
After STi’s start-up sequence is complete,
the alphanumeric display will show
Highway, AutoScan, City or City NoX to
indicate which sensitivity mode is selected.
If you prefer, you can select alternate
power-on displays. See the Programming
section for details.
Voice Alerts
The STi provides digital voice
announcements (factory default) for alerts.
If you prefer, you can turn off the voice
announcement feature and have the STi
provide audible tones without the voice
announcement. See programming section
for details.
AutoMute
Your STi has our patented AutoMute
feature. After STi alerts you to a radar
encounter at the volume you have selected,
the AutoMute feature will automatically
reduce the volume to a lower level. This
keeps you informed without the annoyance
of a continuous full-volume alert.
If you prefer, you can turn the
AutoMute feature off. See the Programming
section for details.
Mute
The VOLUME/MUTE button, located in the
center of the STi’s front panel, allows you to
silence the audio alert during a radar
encounter.
To mute the audio for a single specific
signal, briefly press the VOLUME/MUTE
button. After that radar encounter has
passed, the mute will automatically reset
and the audio will alert you to the next
encounter.
8
Sensitivity Button (SENS)
The “SENS” button selects the STi’s
sensitivity mode. We recommend AutoScan
mode for most driving.
Highway Mode (Highway)
In this setting, the STi will detect all signals
at maximum range.
AutoScan Mode (AutoScan)
In this setting the STi's internal computer
continuously analyzes all incoming signals
and intelligently filters out unwanted X and
K-band false alarms from automatic door
openers and motion sensors. Full
sensitivity is maintained on all other bands
City (City STD)
In this setting, X and K-band sensitivity is
further reduced to eliminate unwanted false
alarms in congested urban areas.
City No X (City NoX)
In this setting, K-band sensitivity is the same
as City STD, however, X-band is completely
turned off.
9
Brightness
The STi’s brightness is controlled by a
photocell located behind the front display
lens. This photocell will automatically adjust
the display and backlit buttons based on the
ambient light in your vehicle. If you prefer,
you can select a fixed brightness level,
including Full Dark Mode. See the
programming section for details.
WARNING: Do not use the STi in this
mode unless you are absolutely certain
that there are no traffic radar guns using
X-band in your area.
Photocell location
STi Manual 3/28/05 3:39 PM Page 11

Controls and Features
10
Power Connector
The STi’s power jack uses a telephone-type
connector. This 4-conductor connector
only works with the included SmartPlug or
optional direct-wire, or our standard power
cord.
For more information or to order, call
us toll-free at 1-800-341-2288.
Signal Strength Meter
The STi’s alphanumeric display consists of
280 individual LEDs, to provide an intuitive
ultra-bright display of signal strength and
text messages.
The STi’s standard bar-graph signal
strength meter only displays information on
a single radar signal. If there are multiple
signals present, STi’s internal computer
determines which is the most important
threat to show on the bar-graph meter.
When STi detects radar, it displays the
band (X, K, Ka), and a precise bar-graph of
the signal strength. When the STi detects a
laser signal, the display will show “LASER.”
When it detects a POP signal, the display
will show “POP.”
Threat Display
Your STi’s Threat Display option is an
advanced display for experienced detector
users. Please use the STi for a few weeks to
get familiar with its other features before
using Threat Display.
To use the Threat Display instead of
the bar graph signal strength meter, you
must select Threat Display in the STi’s
Programming (see pages 12-15).
The STi’s Threat Display
simultaneously tracks multiple radar signals
and their relative signal strength.
Threat Display can help you spot a
change in your normal driving environment;
for example, a traffic radar unit being
operated in an area where there are
normally other signals present.
The Threat Display is actually a
miniature spectrum analyzer. It shows what
band each signal is and its signal strength.
Ka9K2X1
Above is the Threat Display if the STi
was detecting a strong Ka-band, a weak
K-band, and a weak X-band signal.
11
A few more examples will help you
better see how the Threat Display works.
K9 X1
Here Threat Display shows a strong
K-band signal, and a weak X-band signal.
Ka1 X9
Here Threat Display shows a weak
Ka-band signal, and a strong X-band
signal.
Threat Display Details
The band designators (X, K, Ka) will
stay on the display for a few seconds after
the signal has passed. This allows you to see
what the unit detected, even on very brief
signals.
Tech Display
The STi’s Tech Display option is for the
experienced detector user. In this mode,
the STi will display the actual numeric
frequency of the radar signal being
received.
K 24.150
Tech Display shows one K-band signal
at 24.150 gigahertz.
Even long-time detector users will
require a significant amount of time to get
familiar with this new level of information
about detected signals.
Audible Alerts
For Radar signals:
The STi uses a geiger-counter-like
sound to indicate the signal strength and
type of radar signal being encountered.
When you encounter radar, a distinct
audible alert will sound and occur faster as
the signal gets stronger. This allows you to
judge the distance from the signal source
without taking your eyes from the road.
X-band = chirping
K-band = buzzing
Ka-band = double-chirp
POP = full double-chirp
SWS = double buzz
For Laser signals:
Since laser signals are a possible threat
no matter how weak, the STi alerts you to
these bands at full signal strength.
For POP signals:
Since POP signals are a possible threat
no matter how weak, the STi alerts you to
these bands at full signal strength.
For Safety signals:
The STi will alert you to these signals
with a double-beep tone, and a
corresponding text message. A complete
listing of the text messages is on page 23.
NOTE: If you are operating the STi in the
Dark mode, the display will not display
anything when a signal is detected. Only
the audio, and the flashing alert lamp on
the SmartPlug will be seen.
NOTE: If you use Threat Display, the brief
signal shown in the power-on sequence
when you turn on your STi will also be
in Threat Display: an X with a decaying
numeric signal.
STi Manual 3/28/05 3:39 PM Page 13

Programming
12
There are 8 user-selectable options so you
can customize your STi for your own
preferences. The buttons labeled
VOLUME/MUTE and SENS are also used to
enter the Program Mode, REVIEW your
current program settings, and to CHANGE
any settings as desired. The words PGM,
RVW, and CHG are located on the front of
the display lens, and are highlighted in
colored graphics. Pages 14-16 explain each
option in more detail.
How to use Programming
1To enter Program Mode, press and
hold both the VOLUME/MUTE and SENS
buttons down for 2 seconds. (The unit
will beep twice, and will display the word
Program).
2Then press the RVW button to
review the current settings. (You can
either tap the button to change from item to
item, or hold the button to scroll through
the items).
3Press the CHG button to change
any setting. (You can either tap the button
to change from setting to setting, or hold
the button to scroll through all the options).
4To leave the Program Mode, simply
wait 8 seconds without pressing any
button, or press the PWR button. (The
unit will display Complete, beep 4 times,
and return to normal operation).
An example
Here is how you would turn STi’s AutoMute
feature off.
1Enter the Program Mode by holding
both the VOLUME/MUTE and SENS buttons
down for 2 seconds. The STi will beep twice
and display Program.
2Then hold the RVW button down. The
STi will scroll through the categories,
starting with Pilot (Pilot), Alert Lamp
(Alamp), Voice, Power-on sequence
(PwrOn), Signal strength meter (Meter),
and then AutoMute (aMute).
3Release the RVW button when the STi
shows the AutoMute item. Since the factory
setting is for AutoMute to be on, STi will
display aMute ON.
(If you accidentally don't release the
RVW button in time, and STi goes to the
next category, simply hold the RVW button
down again, the STi will scroll through all
of the categories.)
4Press the CHG button to change from
aMute ON to aMute OFF.
5To complete the Programming, simply
wait 8 seconds without pressing any button,
or press the PWR button. The STi will
display Complete, beep 4 times, and return
to normal operation.
Overview of Programming
13
Pilot HWY
Pilot H
Pilot V
Alamp ON
Alamp OFF
Voice ON
Voice OFF
PwrOn STD
PwrOn FST
Meter STD
Meter THT
Meter TEC
aMute ON
aMute OFF
Brt Auto
Brt Min
Brt Med
Brt Max
Brt Dark
Bands DFT
Bands MOD
X ON or OFF (default is on)
K ON or OFF (default is on)
Ka ON or OFF (default is on)
POP ON or OFF (default is off)
LSR ON or OFF (default is on)
SWS ON or OFF (default is off)
Press the CHANGE button
to change your setting
within a category
* Full word: Highway or AutoScan or City
Letter: H or A or C
Vehicle voltage
* Alert lamp on
Alert lamp off
* Voice alerts on
Voice alerts off
* Standard power-on sequence
Fast power-on sequence
* Standard signal strength meter
Threat Display
Tech Display
* AutoMute on
AutoMute off
* Automatic brightness
Minumum brightness
Medium brightness
Maximum brightness
All dark
* Factory default settings
Factory default settings modified
Turn bands “ON” or “OFF” by
pressing the “SENS” button
Press the REVIEW button
to go from one category
to the next
PILOT
(Power-on indication)
ALERT LAMP
VOICE
POWER-ON SEQUENCE
SIGNAL STRENGTH METER
AUTOMUTE
BRIGHTNESS
BANDS
*Factory Default Settings
To reset STi to its original factory
settings, press and hold the
“VOLUME/MUTE” and “SENS” buttons
while turning the power on. The STi’s
display will provide a “Reset” message,
accompanied by an audible alert,
acknowledging the reset.
STi Manual 3/28/05 3:39 PM Page 15

Details of Programming
14
Pilot (Power-on indication)
Pilot HWY (Full description)
In this setting, the STi will display
“Highway,” “City,” or “AutoScan” as its
power-on indication. (factory default)
Pilot H (Letter)
In this setting, the STi will display “H” for
Highway, “A” for AutoScan,“C” for City, and
“Cnx” for City NoX.
Pilot V (Vehicle voltage)
In this setting, the STi will continually
display “H” for Highway, A” for
AutoScan,“C” for City, and “Cnx” for City
NoX, and the vehicle’s voltage.
Alamp
Alamp On (alert lamp on)
In this setting, the backlit VOLUME/MUTE
will flash on and off during an alert.
AlampOFF (alert lamp off)
In this setting, the VOLUME/MUTE backlit
button will not flash on and off during an
alert.
Voice
Voice On (Voice announcements on)
In this setting, all radar, laser, and SWS
messages (if programmed) will be
announced using a digital voice.
Voice Off (Voice announcements off)
In this setting, only the distinct audio tone
will be heard when a radar, Laser, or SWS
message is detected.
Power-on Sequence
PwrOnSTD (Standard)
In this setting, each time you turn on the
STi, it will display “Bel STi,” “LASER,”
“Ka-band,” “K-band,” “X-band,” followed by
a brief SWS alert. (factory default)
If any of the factory default bands have
been disabled, a double X-band tone and
corresponding message (i.e. “X OFF”), will
alert you that one or more bands have been
turned off.
15
PwrOnFST (Fast power-on)
In this setting, the STi will provide a single
X-band tone if the factory default settings
have not been changed. If any of the factory
default band settings have been disabled, a
double X-band tone and corresponding
message (i.e. “X OFF”), will alert you that
one or more bands have been turned off.
Signal Strength Meter
MeterSTD (Standard meter)
In this setting, the meter displays the band
of the received signal, and a bar graph
shows the relative signal strength. (factory
default)
MeterTHT (Threat Display)
In this setting, the meter will simultaneously
track multiple radar signals, including
relative signal strength for each.
MeterTEC (Tech Display meter)
In this setting, the meter displays the actual
numeric frequency of the radar signal
received.
AutoMute
aMute ON (AutoMute on)
In this setting, the STi’s audio alerts will
initially be at the volume you set, but after a
few seconds, the STi will automatically
reduce the volume level, to keep you
informed, but not annoyed. (factory default)
aMuteOFF (AutoMute off)
With AutoMute off, the STi’s audio alerts
will remain at the volume you set for the
duration of the radar encounter.
NOTE: When you are using the Dark
mode, the display will not display
anything. Only the power-on indication
on the SmartPlug will illuminate.
NOTE: A high or low voltage warning is
given any time the vehicle’s voltage
drops below 10.5 volts, or goes above
16.5 volts. This feature is always on,
regardless of the Pilot setting.
NOTE: The Tech Display feature is
explained in more detail on page 11.
STi Manual 3/28/05 3:39 PM Page 17

Brightness
BrtAuto
In this setting, the brightness for the display
and backlit buttons are controlled
automatically by the ambient light in the
vehicle. Sunlight will increase the
brightness level, while dim or no light
(night driving) will decrease the brightness.
BrtMin
In this setting, the display and backlit
buttons are set to a minimum light level.
This setting is retained in memory even if
the power is turned off.
BrtMed
In this setting, the display and backlit
buttons are set to a medium light level. This
setting is retained in memory even if the
power is turned off.
BrtMax
In this setting, the display and backlit
buttons are set to a maximum light level.
This setting is retained in memory even if
the power is turned off.
BrtDark
In this setting, the display and backlit
buttons will be totally dark. The supplied
SmartPlug will provide the only visual indi-
cation that the Sti is operational.
16
Details of Programming
Features and Specifications
Operating Bands
• X-band 10.525 GHz ±25 MHz
• K-band 24.150 GHz ±100 MHz
• Ka-band 34.700 GHz ±1300 MHz
• Laser 904nm, 33 MHz bandwidth
Radar Receiver
• Dual-Horn Antenna Casting
• Superheterodyne, dual LNA
• Scanning Frequency Discriminator
• Digital Signal Processing (DSP)
Laser Detection
• Quantum Limited Video Receiver
• (5) Optical Laser Sensorss
Display Type
• 280 LED Alphanumeric
• Bar Graph, Threat Display™or Tech Display™
• Automatic, plus 4 levels of fixed brightness
including full Dark
Power Requirement
• 12VDC, Negative Ground
• Coiled SmartPlug™
with Mute Button (included)
• Direct-wire SmartPlug™(included)
Programmable Features
• Power-On Indication
• Alert Lamp
• Voice Alerts
• Power-On Sequence
• Signal Strength Meter
• AutoMute
• Display Brightness
• Bands
Sensitivity Control
• AutoScan
• Highway
• City
Additional Patented Technology
• Auto Calibration Circuitry
• Mute/AutoMute™
/SmartMute™
• TotalShield™Technology
Dimensions (Inches)
• 1.25 H x 2.75 W x 4.75 L
Patented Technology
US patents:
6,836,238 6,693,578 6,614,385 6,587,068
6,400,305 6,249,218 6,069,580 5,668,554
5,600,132 5,587,916 5,559,508 5,365,055
5,347,120 5,446,923 5,402,087 5,305,007
5,206,500 5,164,729 5,134,406 5,111,207
5,079,553 5,049,885 5,049,884 4,961,074
4,954,828 4,952,937 4,952,936 4,939,521
4,896,855 4,887,753 4,862,175 4,750,215
4,686,499 4,631,542 4,630,054 4,625,210
4,613,989 4,604,529 4,583,057 4,581,769
4,571,593 4,313,216 D314,178 D313,365
D310,167 D308,837 D296,771 D288,418
D253,752
Canadian patents:
2,330,964 1,295,715 1,295,714 1,187,602
1,187,586
European patent:
1,145,030
Other patents pending. Additional patents
may be listed inside the product.
17
Technical Details
Bands
BandsDFT
In this setting, the factory default settings
for radar and laser are monitored.
This is the factory setting, and it is
highly recommended that you use your STi
in this mode.
BandsMOD
In this setting, STi will warn you with an
audible alert, and associated text message
stating which band has changed from the
original factory setting (i.e. “SWS ON”).
This warning is displayed during the start
up sequence (standard or fast).
WARNING: Do not turn off a band unless
you are absolutely certain that there are
no traffic radar guns using that specific
band in your area.
STi Manual 3/28/05 3:39 PM Page 19

Technical Details
18
Interpreting Alerts
Although the STi has a comprehensive
warning system and this handbook is as
complete as we can make it, only
experience will teach you what to expect
from your STi and how to interpret what it
tells you. The specific type of radar being
used, the type of transmission (continuous
or instant-on) and the location of the radar
source affect the radar alerts you receive.
The following examples will give you
an introduction to understanding the STi’s
warning system for radar, laser and safety
alerts.
Explanation
You are approaching a continuous radar
source aimed in your direction.
An instant-on radar source is being used ahead
of you and out of your view.
An instant-on radar source or laser source is
being used nearby. This kind of alert requires
immediate attention!
Laser is being used in the area. Because laser is
inherently difficult to detect, any laser alert
may indicate a source very close by.
A moving patrol car with continuous radar is
overtaking you from behind. Because these
signals are reflected (reflections are increased
by large objects), they may or may not
eventually melt into a solid point even when
the patrol car is directly behind you.
Alert
The STi begins to sound slowly, then the rate
of alert increases. The Signal Meter ramps
accordingly.
STi emits short alerts for a few seconds and
then falls silent only to briefly alert and fall
silent again.
STi suddenly sounds a continuous tone for the
appropriate band received. All segments in the
Signal Strength Meter are lit.
A brief laser alert.
STi receives weak signals. These signals may
be a little stronger as you pass large, roadside
objects. The signals increase in frequency.
19
Explanation
You are approaching a radar unit concealed by
a hill or an obstructed curve.
A patrol car is traveling in front of you with a
radar source aimed forward. Because signals
are sometimes reflected off of large objects
and sometimes not, the alerts may seem
inconsistent.
A patrol car is approaching from the other
direction, sampling traffic with instant-on
radar. Such alerts should be taken seriously.
You are driving through an area populated
with radar motion sensors (door openers,
burglar alarms, etc.). Since these transmitters
are usually contained inside buildings or aimed
toward OR away from you, they are typically
not as strong or lasting as a real radar
encounter.
Alert
STi alerts slowly for a while and then abruptly
jumps to a strong alert.
STi alerts intermittently. Rate and strength of
alerts may be consistent or vary wildly.
STi alerts intermittently. Rate and strength of
signal increases with each alert.
STi gives an X-band alert intermittently.
CAUTION: Since the characteristics of these
alerts may be similar to some of the
preceding examples, overconfidence in an
unfamiliar area can be dangerous.
Likewise, if an alert in a commonly
traveled area is suddenly stronger or on a
different band than usual, speed radar may
be set up nearby.
STi Manual 3/28/05 3:39 PM Page 21

Technical Details
20
How Radar Works
Traffic radar, which consists of microwaves,
travels in straight lines and is easily reflected
by objects such as cars, trucks, even
guardrails and overpasses. Radar works by
directing its microwave beam down the
road. As your vehicle travels into range, the
microwave beam bounces off your car, and
the radar antenna looks for the reflections.
Using the Doppler Principle, the radar
equipment then calculates your speed by
comparing the frequency of the reflection
of your car to the original frequency of the
beam sent out.
Traffic radar has limitations, the most
significant of these being that it typically can
monitor only one target at a time. If there is
more than one vehicle within range, it is up
to the radar operator to decide which target
is producing the strongest reflection. Since
the strength of the reflection is affected by
both the size of the vehicle and its
proximity to the antenna, it is difficult for
the radar operator to determine if the signal
is from a sports car nearby or a semi-truck
several hundred feet away.
Radar range also depends on the power
of the radar equipment itself. The strength
of the radar unit’s beam diminishes with
distance. The farther the radar has to travel,
the less energy it has for speed detection.
Because intrusion alarms and motion
sensors often operate on the same
frequency as X-Band radar, your STi will
occasionally receive non-police radar
signals. Since these X-Band transmitters are
usually contained inside of a building, or
aimed toward the ground, they will
generally produce much weaker readings
than will a true radar encounter. As you
become familiar with the sources of these
pseudo alarms in your daily driving, they
will serve as confirmation that your STi’s
radar detection abilities are fully
operational.
How “POP” Works
“POP” mode is a relatively new feature for
radar gun manufacturers. It works by
transmitting an extremely short burst,
within the allocated band, to identify
speeding vehicles in traffic. Once the target
is identified, or “POPPED,” the gun is then
turned to its normal operating mode to
provide a vehicle tracking history, (required
by law).
21
How Laser (Lidar) Works
Laser speed detection is actually LIDAR
(Light Detection and Ranging). LIDAR guns
project a beam of invisible infrared light.
The signal is a series of very short infrared
light energy pulses, which move, in a
straight line, reflecting off your car and
returning to the gun. LIDAR uses these light
pulses to measure the distance to a vehicle.
Speed is then calculated by measuring how
quickly these pulses are reflected given the
known speed of light.
LIDAR (or laser) is a newer technology
and is not as widespread as conventional
radar, therefore, you may not encounter
laser on a daily basis. And unlike radar
detection, laser detection is not prone to
false alarms. Because LIDAR transmits a
much narrower beam than does radar, it is
much more accurate in its ability to distin-
guish between targets and is also more
difficult to detect. AS A RESULT, EVEN
THE BRIEFEST LASER ALERT SHOULD
BE TAKEN SERIOUSLY.
There are limitations to LIDAR equip-
ment. LIDAR is much more sensitive to
weather conditions than RADAR, and a
LIDAR gun’s range will be decreased by
anything affecting visibility such as rain, fog,
or smoke. A LIDAR gun cannot operate
through glass and it must be stationary in
order to get an accurate reading. Because
LIDAR must have a clear line of sight and is
subject to cosine error (an inaccuracy,
which increases as the angle between the
gun and the vehicle, increases) police
typically use LIDAR equipment parallel to
the road or from an overpass. LIDAR can be
used day or night.
STi Manual 3/28/05 3:39 PM Page 23

Technical Details
22
How TotalShield™Technology Works
Bel’s TotalShield Technology keeps RF
signals from radiating from the detector’s
antenna. Unlike other detectors, which
merely move their RF signals (local
oscillators) to another frequency (which
will be detectable by future detector-
detectors), this revolutionary design keeps
you unseen by the current VG-2, Spectre,
etc. This unique design will also keep you
unseen from any future radar detector
detectors as well.
Although the Bel STi is a completely
undetectable radar, laser and safety
detector, driving techniques and reactions
to alerts can still draw unwanted attention.
Here are a few examples:
1. Hitting the brakes immediately when
the STi provides an alert can broadcast use
of a detector.
2. Visible power cords, brackets and
suction cup marks on the glass can also
advertise to others that you have a detector.
3. Traveling at night with a bright red
glow from a radar detector’s display visible
from outside your vehicle can also draw
unwanted attention. The STi offers
adjustable brightness, including a full dark
mode which will provide audio alerts, but
no visual indication except for the alert LED
on the SmartPlug.
How Safety Radar Works
Safety Warning System, or SWS, uses a
modified K-band radar signal. The SWS
safety radar system has 64 possible
messages (60 currently allocated). The SWS
messages your STi can display are listed on
the facing page.
From the factory, your STi is
programmed with SWS decoding ON. If
SWS is used in your area, your STi will
display the safety messages associated with
the signal. If you do not wish to detect this
system, use the Programming feature to
turn STi's SWS decoding OFF.
Note: some of the safety messages have
been condensed, so that each message can
be displayed on one or two screens on STi’s
eight-character display.
Since Safety radar technology is
relatively new, and the number of
transmitters in operation is not yet wide-
spread, you will not receive Safety signals
on a daily basis. Do not be surprised if you
encounter emergency vehicles, road
hazards and railroad crossings that are
unequipped with these transmitters. As
Safety transmitters become more prevalent
(the number of operating transmitters is
growing every day), these Safety radar
signals will become more common.
For more information and details about
SWS safety radar, visit their web site at
www.safetyradar.com.
23
SWS Text Messages
Highway Construction or Maintenance
1WorkZone
2Road Closed
3Bridge Closed
4WorkCrew Highway
5WorkCrew Utility
6Detour
7Truck Detour
8MustExit
9Rtlane Closed
10 CntrLane Closed
11 LeftLane Closed
12 Future use
Highway Hazard Zone Advisory
13 Police
14 Train
15 Low Overpass
16 BridgeUp
17 Bridge Wt Limit
18 RockSlid Area
19 School Zone
20 Road Narrows
21 Sharp Curve
22 Croswalk
23 Deer Crossing
24 Blind or Deaf Kid
25 SteepUse LowGear
26 Accident
27 PoorRoad Surface
28 Loading SchoolBus
29 DontPass
30 Dangrous Intrsect
31 Emergncy Vehicle
32 Future use
Weather Related Hazards
33 HighWind
34 Severe Weather
35 HeavyFog
36 Flooding
37 BridgIce
38 RoadIce
39 Dust Blowing
40 Sand Blowing
41 Blinding Snow
42 Future use
Travel Information/Convenience
43 RestArea
44 RestArea w/servic
45 24hrFuel
46 Insp Stn Open
47 Insp Stn Closed
48 Reduced Speed
49 Speed Enforced
50 HazMatls Exit
51 Expect Delay
52 10 Min Delay
53 20 Min Delay
54 30 Min Delay
55 1 Hour Delay
56 Traffic TunRadio
57 Pay Toll
58 Trucks ExitRght
59 Trucks ExitLeft
60 Future use
Fast/Slow Moving Vehicles
61 Emerg Veh Moving
62 Police Pursuit
63 Oversize Vehicle
64 SloMovng Vehicle
STi Manual 3/28/05 3:39 PM Page 25

Troubleshooting
24
Problem
STi beeps briefly at the same
location every day, but no radar
source is in sight.
STi does not seem sensitive to radar
or laser.
STi did not alert when a police car
was in view.
STi did not provide a Safety signal
while within range of an emergency
vehicle.
STi’s display is not working.
STi’s audible alerts are less loud after
the first few alerts.
STi bounces or sags on windshield.
STi’s power-on sequence reoccurs
while you are driving.
Your 14-year old son has changed all
9 of the Programming options.
Solution
• An X-band motion sensor or intrusion alarm is located within
range of your route. With time, you will learn predictable
patterns of these signals.
• Make sure that windshield wipers do not block ST i’s radar
antenna and that the laser lens is not behind tinted areas.
• Determine if your vehicle has an Instaclear®, ElectriClear®or
solar reflective windshield which may deflect radar or laser
signals.
• STi may be in City Mode.
• VASCAR (Visual Average Speed Computer and Recorder) a
stopwatch method of speed detection, may be in use.
• Officer may not have radar or laser unit turned on.
• Safety transmitters may not be commonly used in your area.
• Press the SENS button to deactivate Dark Mode.
• STi is in AutoMute Mode. See page 8 for details.
• STi is not making contact with the windshield to provide
stability. While holding down STi’s QuickMount button, slide
STi toward the windshield so that the back top edge makes
firm contact.
• A loose power connection or dirty lighter socket can cause
STi to be briefly disconnected.
• You can return all of the programming options to the factory
defaults by holding down the VOLUME/MUTE and SENS
buttons while you turn the STi on.
25
Problem
STi will not turn on.
STi feels very warm.
Solution
• Check the PWR is on.
• Check that vehicle ignition is ON.
• Check that vehicle lighter socket is functional.
• Try STi in another vehicle.
• It is normal for STi to feel warm.
Explanation of Displays
No display STi is in the Dark mode (page 9, 16)
PilotHWY One of the many programming messages (pages 12-16)
WorkZone One of the many Safety Radar messages (pages 22-23)
Caution STi has detected a Safety Radar Signal, but the signal isn’t yet strong
enough to decode the specific safety message (page 22-23)
Self Cal STi is running a self-calibration test
Service STi has failed the calibration test. Contact Beltronics for repair
Required
STi Manual 3/28/05 3:39 PM Page 27

Service
26
Service Procedure
If your STi ever needs service, please follow
these simple steps:
1Check the troubleshooting section of
this manual. It may have a solution to your
problem.
2Call us at 1-800-341-2288. We may be
able to solve your problem over the phone.
If the problem requires that you send your
STi to the factory for repair, we will provide
you with a Service Order Number, which
must be included on the outside of your
shipping box.
Enclose the following information with your
STi:
• Your Service Order Number
• Your name and return address
• Your daytime telephone number
• A description of the problem you are
experiencing
Beltronics Extended Service Plan
Beltronics offers an optional extended
service plan. Contact Beltronics for details
at 1-800-341-2288.
Out Of Warranty Repairs
For out of warranty repairs, include
prepayment in the amount you were
quoted by the Beltronics Customer Service
Representative. If the detector has been
damaged, abused or modified, the repair
cost will be calculated on a parts and labor
basis. If it exceeds the basic repair charge,
you will be contacted with a quotation. If
the additional payment is not received
within 30 days (or if you notify us that you
choose not to have your STi repaired at the
price quoted), your STi will be returned,
without repair. Payment can be made by
check, money order, or credit card.
Ship STi and power cord to:
BELTRONICS
Customer Service Department
Service Order Number ______________
5442 West Chester Road
West Chester OH 45069
For your own protection, we recommend
that you ship your STi postpaid and insured.
Insist on a proof of delivery, and keep the
receipt until the return of your STi.
27
Register
online:
@
www.
beltronics
.com
BELTRONICS PRODUCT REGISTRATION CARD
̈If you purchased your detector directly from BELTRONICS, you do not need to fill this out.
̈If you did not purchase your detector directly from BELTRONICS, please fill out this section and return to us,
or register online at our web address: www.beltronics.com.
1. First Name___________________ Middle Initial____ Last Name___________________________
Address______________________________________________________________________
City_______________________________________ State_____________ ZIP______________
Phone Number (In case we have a question)_____________________________________________
2. Product Purchased BELTRONICS STi DRIVER Serial Number_______________________
3. Place of Purchase__________________________________ Date_________ Price____________
4. Primary reason for purchasing this BELTRONICS product____________________________________
____________________________________________________________________________
____________________________________________________________________________
̄Remove card along perforations ̄ ̄
STi Manual 3/28/05 3:39 PM Page 29

Warranty and Accessories
29
BELTRONICS One Year Limited Warranty
What this warranty covers: BELTRONICS
warrants your Product against all defects in
materials and workmanship.
For how long: One (1) year from the date of
the original purchase.
What we will do: BELTRONICS, at our
discretion, will either repair or replace your
Product free of charge.
What we will not do: BELTRONICS will not
pay shipping charges that you incur for sending
your product to us.
What you must do to maintain this
warranty: Show original proof of purchase
from an authorized BELTRONICS dealer.
Warranty Exclusions: Warranty does not
apply to your product under any of the
following conditions: 1. The serial number has
been removed or modified. 2. Your product has
been subjected to misuse or damage (including
water damage, physical abuse, and/or improper
installation). 3. Your product has been modified
in any way. 4. Your receipt or proof-of-purchase
is from a non-authorized dealer or internet
auction site including E-bay, U-bid, or other non-
authorized resellers.
To obtain service: 1. Contact BELTRONICS (1-
800-341-2288) to obtain a Return Authorization
number. 2. Properly pack your product and
include: your name, complete return address,
written description of the problem with your
product, daytime telephone number, and a
copy of the original purchase receipt. 3. Label
the outside of the package clearly with your
Return Authorization number. Ship the product
pre-paid (insured, for your protection) to:
Beltronics Inc, 5442 West Chester Rd., West
Chester, OH 45069.
LIMITATION OF WARRANTY: EXCEPT AS
EXPRESSLY PROVIDED HEREIN, YOU ARE
ACQUIRING THE PRODUCT “AS IS” AND
“WHERE IS,” WITHOUT REPRESENTATION OR
WARRANTY. BELTRONICS SPECIFICALLY
DISCLAIMS ANY REPRESENTATION OR
WARRANTY INCLUDING, BUT NOT LIMITED
TO THOSE CONCERNING THE MERCHANT-
ABILITY AND SUITABILITY OF THE PRODUCT
FOR A PARTICULAR PURPOSE. BELTRONICS
SHALL NOT BE LIABLE FOR CONSEQUENTIAL,
SPECIAL OR INCIDENTAL DAMAGES
INCLUDING, WITHOUT LIMITATION,
DAMAGES ARISING OUT OF THE USE, MISUSE
OR MOUNTING OF THE PRODUCT.
The above limitations or exclusions shall be
limited to the extent they violate the laws of
any particular state. BELTRONICS is not
responsible for products lost in shipment
between the owner and our service center.
Other legal rights: This Warranty gives you
specific rights. You may have other legal rights,
which vary, from state to state.
Accessories
The following accessories and replacement
parts are available for the Beltronics STi:
Standard Coiled Power Cord
$14.00
Direct-wire Power Cord
$10.00
Coiled SmartPlug
$29.95
Direct-wire SmartPlug
$29.95
Accessory Kit
$19.95
Extra Windshield Mount
$4.00
Carrying Case
$29.95
28
̄Remove card along perforations ̄
ATTN CUSTOMER SERVICE
BELTRONICS INC
5442 WEST CHESTER RD
WEST CHESTER OH 45069-9789
STi Manual 3/28/05 3:39 PM Page 31