GME TX3500 User manual

Gloss white art stock - 130gsm
Trimmed document size: 135 mm (w) x 152 mm (h) 20 pages
Book to be saddle stitched in 2 places
Printed in CMYK throughout with gloss Aq Varnish
5 watt compact UHF CB radio
INSTRUCTION MANUAL

PAGE 2 INSTRUCTION MANUAL TX3500
INTRODUCTION ....................................................................3
IMPORTANT INFORMATION...................................................3
POSSIBLE ISSUES...................................................................3
EMERGENCY CHANNELS.......................................................3
TELEMETRY CHANNELS.........................................................3
FEATURES.............................................................................4
GENERAL OPERATION...........................................................4
Volume ...........................................................................4
Selecting Channels..........................................................4
Squelch...........................................................................4
Front Panel Controls........................................................5
LCD Panel .......................................................................5
Signal Meter ...................................................................6
Transmitting....................................................................6
Time-out Timer................................................................6
Backlighting....................................................................6
Bandwidth Filter Settings.................................................6
To change the Filter Setting.............................................6
Dynamic Volume Control (DVC) .......................................7
Repeaters and Duplex Mode............................................7
Priority Channel ..............................................................8
Scanning.........................................................................8
CTCSS & DCS................................................................10
Receive (RX) only Channels ...........................................12
INSTALLATION ....................................................................12
DC POWER CONNECTION...................................................14
HIGH VOLTAGE WARNING ...................................................15
ANTENNA CONNECTION ....................................................15
NOISE SUPPRESSION...........................................................15
CTCSS TONE FREQUENCY CHART........................................16
DCS TONE CHART................................................................17
UHF CB OPERATING FREQUENCIES .....................................18
SPECIFICATIONS .................................................................19
SC CONTRACT WARRANTY AGAINST DEFECTS........Back page
Contacts ...........................................................Back page
CONTENTS
ACCESSORIES SUPPLIED
• TX3500 Radio
• Mounting Cradle
• Instruction Manual
• Microphone
• Microphone Clip
• DC Lead
• Screw Pack
If any items are missing or damaged, please contact
your retailer or place of purchase .
INTRODUCTION
Your GME TX3500 80 channel radio is Australian designed
and built and is the most advanced UHF Citizen Band
radio available.
The TX3500 combines the very latest in electronic hardware
with the most up-to-date computer aided design and
manufacturing techniques to produce an extremely compact
mobile radio with outstanding specifications and performance.
The TX3500 is designed for unobtrusive mounting in modern
vehicles. With its built-in loud speaker and extremely small size
the TX3500 can be mounted in almost any convenient location.

TX3500 INSTRUCTION MANUAL PAGE 3
IMPORTANT INFORMATION
The use of the Citizen Band radio service is licensed in
Australia by the ACMA Radio communications (Citizens
Band Radio Stations) Class Licence and in New Zealand by
the Ministry of Economic Development New Zealand (MED).
A General User Radio Licence for Citizens Band radio and
operation is subject to conditions contained in those licences.
The class licence for users and equipment operating in the
CB/PRS 477 MHz band has been amended. This radio meets
the new 80 channel standard.
In simple terms the same amount of spectrum is available;
however, radio transceivers can now operate in a narrower
bandwidth and hence use less spectrum. These radios are
generally referred to as narrowband or 12.5 kHz radios. By
using 12.5 kHz channel spacing instead of 25 kHz, the 40
channels originally allocated can now be expanded to 80
channels thereby doubling the channel capacity and relieving
congestion in the UHF CB/PRS band.
Original 40 channel wideband Radios will continue to operate
on the original 40 channels, however they will not be able
to converse on the newer channels 41 – 80. The newer
narrowband radios will be able to converse with all older 40
channel wideband radios on all channels 1 to 40 as well as the
newer channels allocated from 41 to 80.
The mixing of narrowband and wideband radios in the
same spectrum can cause some possible operating issues of
interference and varying levels of received volume.
POSSIBLE ISSUES
The mixing of narrowband and wideband radios in the
same spectrum can cause some possible operating issues of
interference and differences in levels of received volume.
When a new narrowband radio receives a transmission from an
older wideband radio the speech may sound loud and distorted
– simply adjust your radio volume for best performance.
When an older wideband radio receives a signal from a new
narrowband radio, the speech may sound quiet –– simply
adjust your radio volume for best performance.
Depending on how close your receiving radio is to another
transmitting radio, there can be interference from the
transmitting radio if it is using a channel adjacent to the
channel you are listening to. Simply try moving up or down a
few channels from the currently selected channel.
The above situations are not a fault of the radio but a normal
symptom of operating wideband and narrowband radios in the
same bandwidth. This possible interference will decrease over
time as the population of wideband radios operating in the
UHF CB band ages and decreases.
Further information and updates are available from the
Australian Communications and Media Authority (ACMA) at
www.acma.gov.au and the Ministry of Economic Development
(MED) Radio Spectrum Management at: www.rsm.govt.nz
EMERGENCY CHANNELS
The ACMA has allocated channels 5/35 for emergency use
only. Channel 5 is the primary Simplex Emergency Channel.
Where a Channel 5 repeater is available, you should select
Duplex on CH 5.
NOTE: Channel 35 is the input channel for the Channel 5
repeater therefore Channel 35 should also not be used for
anything other than emergency transmissions.
TELEMETRY CHANNELS
ACMA regulations have allocated channels 22 and 23
for telemetry only applications and have prohibited the
transmission of speech on these channels. Consequently the
TX3500 has a transmit inhibit applied to channels 22 and
23. In the event additional telemetry/telecommand channels
are approved by the ACMA, these channels shall be added to
those currently listed where voice transmission is inhibited.
Currently transmissions on channels 61, 62 and 63 are also
inhibited and these channels are reserved for future allocation.

PAGE 4 INSTRUCTION MANUAL TX3500
FEATURES
•Microprocessor Controlled Frequency Synthesiser: Allows
user programmable control of scanning, channel memories
and selected feature options.
•Full Spectrum Backlighting: User adjustable, totally
customisable backlight settings to match the vehicles
dashboard lighting or drivers preference.
•
Digital Signal Processing: Measures, filters and compresses
standard analogue audio signals and converts them into
digital format. Allows advanced RF and audio processing
techniques to be applied to maximise the radios performance.
•Advanced Signal Management: Identifies interference
caused by strong local signals on adjacent channels and
prevents these from opening your squelch. ASM also
minimises distortion on reception by fine tuning the receiver
frequency to match that of the incoming signal.
•Dynamic Volume Control: Automatically compensates for
variations in received audio level to provide a constant audio
output level to the speaker.
•
Programmable Scan Function: Scans the selected UHF CB
channels with both Group and Open scan functions available.
•Individually Programmable DUPLEX function: User
selectable for only those individual channels in your area
that have repeaters, leaving the others free for use as extra
simplex channels.
•Priority Channel: A user programmable Priority channel
feature allows your working channel to be instantly recalled
at the press of a key.
•High Contrast Liquid Crystal Display: Fully detailed LCD
provides a visual indication of the selected channel and all
selected functions at a glance.
•Fully Customisable Backlighting: User adjustable back light
settings provides smooth blending of brightness, colour and
saturation to suit your personal preference.
•CTCSS & DCS: A built-in Continuous Tone Coded Squelch
and Digital Coded Squelch System option provides silent
channel operation.
•Over Voltage Protection: Special overvoltage detection
circuitry protects the radio and warns of excessive voltage
conditions by flashing the display.
•Surface Mount Technology: The very latest surface mount
component types, design and assembly techniques and
quality control procedures are used to ensure the highest
performance and reliability.
•Dual Microphone Input Sockets: Front and rear microphone
sockets to match most installation needs.
•Front and Rear microphone inputs: Convenient front and
rear microphone inputs to facilitate ease of installation and
operation across a range of vehicles.
•Designed and Manufactured in Australia: The TX3500 has
been totally designed and manufactured in Gladesville NSW
to meet the demanding needs of the Australian community.
GENERAL OPERATION
VOLUME
Rotate the Volume control clockwise past the ‘click’ to turn
the TX3500 on. Rotate the control further clockwise to increase
the volume, or counter clockwise to decrease the volume.
If no sound is heard, briefly press the SQL key to temporarily
un-mute the radio then adjust the volume while listening to
the background noise. When finished, briefly press the SQL
key again to re-mute the radio.
NOTE: At the minimum volume setting there is still sufficient
volume to be heard in a quiet cabin environment.
SELECTING CHANNELS
Select the required channel by rotating the Channel knob.
Rotate the knob clockwise to select higher channel and
counter clockwise to select lower channels. The selected
channel is displayed on the LCD.
SQUELCH
The squelch is used to eliminate any annoying background
noise when there are no signals present. The squelch can
be opened or closed using the SQL key. When the squelch
is open the receiver’s background noise can be heard and

TX3500 INSTRUCTION MANUAL PAGE 5
the symbol is displayed. When the squelch is closed the
receiver remains quiet while there are no signals present but
any incoming signals will override the squelch and be heard in
the speaker.
To open the squelch
Briefly press the SQL key. A low beep will be heard and the
symbol will be displayed. If there are no signals present you
will hear the receiver’s background noise.
To close the squelch
Briefly press the SQL key. A high beep will be heard. If there
are no signals present the symbol will disappear and the
receiver will become quiet again.
Adjusting the squelch level
The TX3500’s default squelch sensitivity level has been factory
set to provide optimum performance under most operating
conditions. If required, the sensitivity level can be adjusted to
suit changing conditions.
To adjust the squelch sensitivity, briefly press the Channel
knob. The channel display will show the current squelch
setting in values from 1 - 9. A squelch setting of -1 allows the
squelch to open on very weak signals whereas a setting of
-9 requires much stronger signals to overcome the squelch.
Rotate the Channel knob to change the squelch setting.
Press the Channel knob to accept the setting and return
to normal operation.
PRI SCAN DUP SQL
VOLUMECHANNEL
Channel Selector LCD (Liquid Crystal Display) Volume Selector
Microphone Port Priority Key Scan Key Duplex Key Squelch Key
Channel Display
Scan Icon Busy Icon Transmit Icon
Signal Meter Priority Icon Duplex Icon CTCSS/DCS Icon
LCD PANEL
FRONT PANEL CONTROLS