GME TX3500SVP User manual

INSTRUCTION MANUAL
Compact 5 watt UHF CB radio

PAGE 2 INSTRUCTION MANUAL TX3500S
ACCESSORIES SUPPLIED...........................................................2
INTRODUCTION .......................................................................2
IMPORTANT INFORMATION......................................................3
Possible Issues .......................................................................3
Emergency Channels..............................................................3
Telemetry Channels................................................................3
FEATURES................................................................................4
CONTROLS...............................................................................5
Front Panel Controls...............................................................5
Rear Panel .............................................................................5
LCD Panel..............................................................................5
TX3500S microphone.............................................................5
GENERAL OPERATION..............................................................6
Volume..................................................................................6
Selecting Channels.................................................................6
Squelch .................................................................................6
Signal Meter..........................................................................6
Transmitting...........................................................................6
Time-out Timer.......................................................................6
Backlighting...........................................................................7
Beep Tone volume..................................................................7
Bandwidth Filter Settings .......................................................7
Dynamic Volume Control (DVC)..............................................8
Silent Squelch Tail ..................................................................8
Repeaters and Duplex Mode ..................................................8
Priority Channel ...................................................................10
Scanning .............................................................................10
Open Scan...........................................................................10
Group Scan..........................................................................11
Network Scan ......................................................................12
CTCSS & DCS.......................................................................14
Receive (RX) only Channels ..................................................16
Configuration Menu.............................................................16
INSTALLATION .......................................................................18
DC Power Connection ..........................................................20
High Voltage Warning ..........................................................20
ANTENNA CONNECTION........................................................21
NOISE SUPPRESSION..............................................................21
CTCSS TONE FREQUENCY CHART...........................................22
DCS TONE CHART...................................................................23
UHF CB OPERATING FREQUENCIES ........................................24
SPECIFICATIONS ....................................................................25
SC CONTRACT WARRANTY AGAINST DEFECTS.......................27
ACCESSORIES SUPPLIED
• TX3500S Radio
• Mounting Cradle
• Microphone
• Microphone Clip
• DC Lead
• Screw Pack
• Instruction Manual
INTRODUCTION
Your GME TX3500S 80 channel radio is Australian designed
and built and is the most advanced UHF Citizen Band
radio available.
The TX3500S 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 TX3500S is designed for unobtrusive mounting in
modern
vehicles. With its built-in loud speaker and extremely
small size
the TX3500S can be mounted in almost any
convenient location.
CONTENTS

TX3500S 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 TX3500S 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 TX3500S
FEATURES
TRANSMIT (TX)
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.
SCANNING AND MEMORY FUNCTIONS
Microprocessor Controlled Frequency Synthesiser: Allows user programmable control of scanning, channel memories and
selected feature options.
Programmable Scan Function: Scans the selected UHF CB channels with both Group, Open and Network scan functions
available.
Priority Channel: A user programmable Priority channel feature allows your working channel to be instantly recalled at the
press of a key.
SIGNAL PROCESSING
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.
PRIVACY FUNCTIONS
CTCSS & DCS: A built-in Continuous Tone Coded Squelch and Digital Coded Squelch System option provides silent channel
operation.
PHYSICAL PROPERTIES
Over Voltage Protection: Special overvoltage detection circuitry protects the radio and warns of excessive voltage conditions
by flashing the display.
USER CONTROLS AND INTERFACE
Full Spectrum Backlighting: User adjustable, totally customisable backlight settings to match the vehicles dashboard
lighting or drivers preference.
High Contrast Liquid Crystal Display: Fully detailed LCD provides a visual indication of the selected channel and all selected
functions at a glance.
Front and Rear Microphone Inputs: Convenient front and rear microphone inputs to facilitate ease of installation and
operation across a range of vehicles.

TX3500S INSTRUCTION MANUAL PAGE 5
Microphone Port Priority Key Scan Key Duplex Key Squelch Key
PRI SCAN DUP SQL
VOLUMECHANNEL
PUSH
SQL LVL
PUSH HOLD
MENU
Channel Control LCD (Liquid Crystal Display) Volume Control
REAR PANEL
LCD PANEL
FRONT PANEL CONTROLS
Ext Speaker Socket Rear Microphone Socket
Antenna SocketDC Socket
Channel Display
Scan Icon Busy Icon Transmit Icon
Signal Meter
Priority Icon Duplex Icon
CTCSS/DCS Icon
CONTROLS
TX3500S MICROPHONE
Push To Talk

PAGE 6 INSTRUCTION MANUAL TX3500S
GENERAL OPERATION
VOLUME
Rotate the Volume control clockwise past the ‘click’ to turn
the TX3500S 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 Control.
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
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 TX3500S’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
Control. 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 Control to change the Squelch
setting. Press the Channel Control to accept the setting and
return to normal operation.
SIGNAL METER
The signal meter
indicates the relative signal strength of
the incoming signal. Stronger incoming signals will display
more bars while weaker signals will display less bars.
TRANSMITTING
Prior to transmitting, always check the channel is not being
used. This can be done either by listening or by checking that
the signal meter
and the ‘BUSY’ icon is not visible.
To transmit, press the PTT on the microphone. The icon
will appear. Hold the microphone about 5-8 cm from your
face and speak at a normal voice level. The microphone is
quite sensitive so it is not necessary to raise your voice or
shout. Release the PTT when you have finished talking. The
icon will disappear.
IMPORTANT: Always listen to ensure the channel is free
before transmitting.
TIME-OUT TIMER
Your TX3500S has an in-built Time-Out Timer (TOT)
that limits transmissions to a maximum of 3 minutes of
continuous operation. This feature is required by the ACMA
to prevent the radio from jamming the frequency if the PTT
has been accidentally jammed. Once the TOT is triggered
the radio will beep once and the transmitter output will be
switched off. If the PTT remains pressed, the transmit icon
will remain visible but there will be no signal transmitted

TX3500S INSTRUCTION MANUAL PAGE 7
from the radio. Once the PTT has been released the TOT is
reset and transmissions can recommence.
BACKLIGHTING
The Liquid Crystal Display and keys are backlit for easy
viewing at night. The backlighting remains on at while the
TX3500S is switched ON.
Adjusting the backlighting
The backlighting brightness and colour can be adjusted for
personal preference. There are three settings available;
br’ - Brightness Setting: Provides a continuously variable
brightness adjustment from very dim to full brightness.
‘cL’ - Colour Setting: Provides a continuously variable
colour change via a smooth blend of Red, Green and
Blue colours.
‘Li’ - Lightness Setting: Provides a continuously variable
lightness or colour saturation of the selected colour
from full colour to white (no colour).
To make adjustments to the backlighting,
1. Press and hold the Channel Control to enter the Menu.
‘br’ will be displayed indicating the Brightness mode
is selected.
2. Rotate the Channel Control to adjust the display
brightness.
3. Briefly press the Channel Control to select the Colour
mode. ‘cl’ will be displayed.
4. Rotate the Channel Control to adjust the colour.
5. Briefly press the Channel Control to select the Lightness
mode. ‘Li’ will be displayed.
6. Rotate the Channel Control to adjust the lightness
(saturation) of the chosen colour. For the deepest colour
range, reduce the lightness setting.
When finished, press and hold the Channel Control to
return to normal operation.
NOTE: The Menu function will automatically time out after 6
seconds if no further adjustments have been made.
BEEP TONE VOLUME
The Key Beeps provide audible feedback whenever the keys
are pressed. You can adjust the volume of the key beeps
as follows.
1. Press and hold the Channel Control to enter the Menu.
‘br’ will be displayed.
2. Press the Channel Control repeatedly until ‘bP’ (Beep)
is displayed.
3. Rotate the Channel Control clockwise to increase the
Beep volume or counter-clockwise to decrease the Beep
volume. The signal meter bars will increase or decrease
with the volume level setting.
When finished, press and hold the Channel Control to
return to normal operation.
BANDWIDTH FILTER SETTINGS
The TX3500S is fitted with two user-selectable receiver
bandwidth filters which allow the receiver to be adjusted
for either wide or narrow band reception on channels
1 – 40. This feature provides additional compatibility
with older 40-channel radios. The wide setting increases
the tolerance of the TX3500S receiver to older wideband
40 channel radios or to signals that might be slightly off
frequency. The narrow setting increases the selectivity of the
receiver to help reduce interference from strong interfering
signals on adjacent channels.
To change the filter setting
1. Press and hold the Channel Control to enter the Menu.
‘br’ will be displayed.
2. Press the Channel Control repeatedly until ‘FL’ (Filter)
is displayed.
3. Rotate the Channel Control clockwise to select the
Narrow Band Filter. The close spacing of the signal meter
bars confirms the Narrow Band Filter is selected.

PAGE 8 INSTRUCTION MANUAL TX3500S
4. Rotate the Channel Control to select the Wide Band Filter.
The wide spacing of the signal meter bars confirms the
Wide Band Filter is selected.
When finished, press and hold the Channel Control to return
to normal operation.
NOTE: The wideband filter selection only operates on
channels 1-40. Channels 41-80 always remains narrowband.
DYNAMIC VOLUME CONTROL (DVC)
The modulation level of signals heard on the UHF CB band
has always varied considerably resulting in noticeable
differences in received audio volume between stations.
Generally users have compensated for this by adjusting the
volume control for each received signal. With the introduction
of 80 channel narrowband transmissions that use lower levels
of modulation, the diversity in received audio volume is likely
to increase further.
The TX3500S is able to automatically compensate for these
variations in received audio level by utilising a Dynamic
Volume Control. When activated, this feature automatically
compensates for variations in received audio level resulting
in a constant audio output level to the speaker to greatly
enhance the quality of the reception.
To switch the Dynamic Volume Control ON or OFF
1. Press and hold the Channel Control to enter the Menu.
‘br’ will be displayed.
2. Press the Channel Control repeatedly until ‘dL’ (Dynamic
Level) is displayed.
3. Rotate the Channel Control clockwise one click to view
the current setting.
4. Rotate the Channel Control clockwise again to select ON.
‘on’ is displayed.
5. Rotate the Channel Control counter-clockwise to select
OFF. ‘oF’ is displayed.
When finished, press and hold the Channel Control to
return to normal operation.
SILENT SQUELCH TAIL
The Squelch Tail is the short burst of noise that is heard
in the speaker at the end of a transmission before the
Squelch closes.
To some it is a reassuring confirmation that it is their
turn to transmit but in some applications it may be an
annoyance especially when listening through an earpiece
or headphones.
The Silent Squelch Tail function removes this Squelch Tail,
reducing it to a faint click as the Squelch closes.
To enable or disable the Silent Squelch Tail
1. Press and hold the Channel Control to enter the
Menu. ‘br’ will be displayed.
2. Press the Channel Control repeatedly until ‘St’ (Silent
Tail) is displayed.
3. Rotate the Channel Control one click. The current
setting is displayed.
4. Rotate the Channel Control to the right to enable
the Silent Squelch Tail. ‘on’ will be displayed and the
Squelch Tail will be silent.
5. Rotate the Channel Control to the left to disable
the Silent Squelch Tail. ‘oF’ will be displayed and the
Squelch Tail will be restored.
When finished, press and hold the Channel Control to
return to normal operation.
REPEATERS AND DUPLEX MODE
Duplex operation allows the radio to transmit on a different
frequency to that which it receives. This allows operation
through repeater stations.
A repeater station consists of a linked transmitter/receiver
combination installed in a prominent location. The repeater
is designed to receive signals on a designated channel and

TX3500S INSTRUCTION MANUAL PAGE 9
retransmit them on another channel. Repeaters are usually
mounted on hills or tall buildings. The increased elevation
greatly improves both the receiving and transmitting range of
the repeater allowing it to receive and retransmit signals to
radios that would otherwise be out of range of each other.
Normally, UHF radios transmit and receive on the same
frequency - known as Simplex operation. However to
communicate through repeaters, your radio must be able
to transmit and receive on different channels – otherwise
known as Duplex operation. Your TX3500S is fitted with a
Duplex key to allow you to operate through repeaters.
The Duplex function can only be selected on channels 1-8
and 41-48 as these are the channels that have been
allocated for repeater use. When Duplex is selected, your
TX3500S receives on the selected channel (e.g. CH 1) but
transmits 30 channels higher (CH 31). The repeater hears
your signal on CH 31 and retransmits it on CH 1 for others
to hear.
CHANNEL 31
CHANNEL 1
CHANNEL 1
CHANNEL 31
VEHICLE
SIMPLEX
REPEATER
OPERATION
VEHICLE
REPEATER
STATION
The TX3500S allows you to enable or disable Duplex mode
on individual repeater channels. In this way any repeater
channels that are not being used with repeaters in your area
can be used in Simplex mode for normal direct radio-to-radio
communications.
To enable Duplex on a repeater channel
1. Select the required repeater channel (1–8, 41–48)
2. Briefly press the DUP key. The duplex symbol will
appear on the display accompanied by a high beep.
To remove Duplex from a repeater channel
1. Select the required repeater channel (1-8, 41-48). If
duplex is currently selected, the duplex symbol
will appear.
2. Briefly press the DUP key. The duplex symbol will
disappear from the display accompanied by a low beep.
Channel
Selected
Receive
Channel
Transmit
Channel
1 1 31
2 2 32
3 3 33
4 4 34
5* 5* 35*
6 6 36
7 7 37
8 8 38
41 41 71
42 42 72
43 43 73
44 44 74
45 45 75
46 46 76
47 47 77
48 48 78
* Emergency channel only

PAGE 10 I NSTRUCTION MANUAL TX3500S
PRIORITY CHANNEL
The Priority channel feature allows you to instantly recall any
one of the 80 channels in the TX3500S. This feature can be
used to provide instant access to your working channel or
your local repeater channel at the press of key. It is also used
in conjunction with the Group Scan mode.
To store a Priority channel
1. Select the required channel.
2. Press and hold the PRI key. The channel number will flash
then a high beep will be heard as the channel is stored.
To recall a Priority channel
1. Briefly press the PRI key.
2. The TX3500S will immediately switch to the Priority
channel and the ‘PRI’ icon will be displayed.
3. To return to the previously selected channel press the PRI
key again. The ‘PRI’ icon will disappear and the radio will
return to the previously selected channel.
SCANNING
The TX3500S incorporates a Scan function allowing selected
groups of channels to be scanned for signals. Channels can
be scanned at a rate of 40 channels per second. When a
signal is found, scanning will pause to allow the signal to be
heard then resume scanning when the channel is clear again.
Scan groups
The TX3500S features three scan groups - Open Scan, Group
Scan and Network Scan. Each scan group has a separate
channel memory allowing you to program your choice of
channels into each group for scanning.
To select Open Scan, Group Scan or Network Scan
1. Press and hold the Channel Control to enter the Menu.
‘br’ will be displayed.
2. Press the Channel Control repeatedly until ‘Sc’ (Scan) is
displayed.
3. Rotate the Channel Control to select ‘oS’ (Open Scan),
‘GS’ (Group Scan) or ‘nS’ (Network Scan).
When finished, press and hold the Channel Control to
return to normal operation.
NOTE: Network Scan is disabled by default and will not
appear in the Scan Group menu unless it has been enabled.
See Network Scan (on page 12) for details on how to enable
and use Network Scan.
Auto Skip
While scanning, if an active channel in your Scan Group
becomes a nuisance by constantly interrupting the scan,
briefly rotate the Channel Control while the radio is paused
on that channel. The busy channel will be temporarily
removed from the scan group to allow time for the channel
to become clear again and scanning will continue from the
next channel in the sequence. After 30 seconds the skipped
channel will be reinstated in the scan sequence.
If the unwanted active channel continues to interrupt the
scan even after the 30 second skip period has elapsed, hold
the SCAN key while the radio is paused on that channel. The
‘nuisance’ channel will be completely removed from the scan
group for the duration of that scan session. To restore the
channel, simply stop and restart the scan session using the
SCAN key (or switch the radio Off then On again).
NOTE: You can skip as many busy channels from the scan
group as you wish, however if you attempt to skip the last
remaining channel, all the previously skipped channels will be
restored to the scan group.
OPEN SCAN
Open Scan allows a group of channels to be scanned in an
ascending sequence. If a signal is found, the scan will pause
on that channel. During this time you can press the PTT on
the microphone and talk on the channel. Once the channel
has been clear for 5 seconds the scan will resume.
Example: Scanning channels 1 – 8 in Open Scan
1 - 2 - 3 - 4 - 5 - 6 - 7 - 8

TX3500S INSTRUCTION MANUAL PAGE 11
Selecting Open Scan
1. Press and hold the Channel Control to enter the Menu.
‘br’ will be displayed.
2. Press the Channel Control repeatedly until ‘Sc’ (Scan) is
displayed.
3. Rotate the Channel Control to select ‘oS’ (Open Scan.
When finished, press and hold the Channel Control to
return to normal operation.
Programming the Scan Memory
Your radio has all 80 channels factory-programmed into
the Open Scan memory. Any channels not required can be
removed.
To add or remove channels from the Open Scan memory:
1. Select the required channel using the Channel Control.
2. Check to see if the scan symbol is displayed on that
channel.
•If is displayed, the selected channel is already in the
scan memory. Press and hold the SCAN key to remove it.
will disappear.
•If is not displayed, the selected channel is not in the
scan memory. Press and hold the SCAN key to add the
selected channel to the scan memory. will now be
displayed on that channel.
Repeat to add or remove other channels in the scan memory.
Default working channel in Open Scan mode
In the Open Scan mode, your default working channel is the
channel your radio switches to when you press the PTT while
scanning. To define your working channel simply select the
required channel before you press the SCAN key. e.g. to
make channel 24 your working channel, simply select channel
24 before pressing the SCAN key.
To begin scanning
Briefly press the SCAN key. A high beep will be heard and
the icon will animate. During this time the channel
numbers will change rapidly as the channels are scanned.
NOTE: If there are less than 2 channels programmed into the
Open Scan memory, a long low beep will be heard when you
press the SCAN key and the command will be ignored.
Operating in the Open Scan mode
If a busy channel is found, scanning will pause to allow the
signal to be heard and will remain there for as long as the
channel remains busy. Once the channel has been clear for 5
seconds, scanning will resume automatically.
If you don’t wish to listen to a busy channel, briefly rotate the
Channel Control while the radio is paused on that channel.
The busy channel will be temporarily removed from the scan
group to allow time for the channel to become clear again
and scanning will continue. The skipped channel will be
reinstated in the scan sequence after 30 seconds (see Auto
Skip on previous page).
If you press the PTT while the radio is scanning, the scan will
pause and the radio will transmit on the working channel.
After the channel has remained been clear for 5 seconds
scanning will resume.
If your radio pauses on a busy channel and you wish
to talk on that channel, simply press the PTT during a
break in the conversation. If the busy channel was not
your working channel, it now becomes your new working
channel, replacing your previous working channel. Once your
communication has finished and the channel has been clear
for 5 seconds, scanning will resume.
If you need to use your Priority channel (for an urgent call),
briefly press the PRI key. The scan will be cancelled and the
radio will jump straight to the Priority channel.
GROUP SCAN
Group Scan allows you to scan a number of channels for
activity while also monitoring your Priority channel. The
receiver will scan the other channels ONLY WHILE THERE
ARE NO SIGNALS ON THE PRIORITY CHANNEL. If a signal
appears on the priority channel it will override any signals
being received on any of the other channels. In addition, if
you press the PTT at any time, the radio will transmit on the
priority channel.

PAGE 12 I NSTRUCTION MANUAL TX3500S
Example: Scanning channels 1 – 8 with priority
channel 20 in Group Scan
1 - 2 - 3 - 4 - 20 - 5 - 6 - 7 - 8 - 20
Selecting Group Scan
1. Press and hold the Channel Control to enter the Menu.
‘br’ will be displayed.
2. Press the Channel Control repeatedly until ‘Sc’ (Scan) is
displayed.
3. Rotate the Channel Control to select ‘GS’ (Group Scan).
When finished, press and hold the Channel Control to
return to normal operation.
Programming the Scan Memory
1. Select the required channel using the Channel Control.
2. Check to see if the Scan symbol is displayed on that
channel.
•If is displayed, the selected channel is already in the
Scan memory. Press and hold the SCAN key to remove it.
will disappear.
•If is not displayed, the selected channel is not in the
Scan memory. Press and hold the SCAN key to add the
selected channel to the Scan memory. will now be
displayed on that channel.
Repeat to add or remove other channels in the scan memory.
Select your Priority Channel
Program your Priority channel as described earlier under
‘Priority Channel’.
To begin Scanning
Press the SCAN key. A high beep will be heard and the
icon will animate. During this time the channel numbers will
change rapidly as the channels are scanned with the Priority
channel will be scanned every fourth channel.
If a signal appears on the Priority channel – at any time – the
radio will switch directly to the Priority channel and will stay
there for as long as the channel remains busy. During this
time you can transmit and receive on the Priority channel.
Once the Priority channel has been clear for 5 seconds the
radio will resume scanning the other channels.
If a signal appears on any other channel, scanning will pause
on that channel and will remain there while the channel is
busy – as long as there are no signals on the Priority channel.
During this time, the receiver will continue to check the
Priority channel every 2 seconds resulting in a series of small
breaks in the reception of the busy channel. Once the signal
has gone and there has been no activity for 5 seconds, the
radio will resume scanning.
To transmit on the Priority channel at any time, simply press
the PTT. The radio will switch straight to the Priority channel.
When you have finished your conversation and there has
been no further activity for 5 seconds, the radio will resume
scanning the other channels.
If you don’t wish to listen to a busy channel, briefly rotate the
Channel Control while the radio is paused on that channel.
The busy channel will be temporarily removed from the scan
group to allow time for the channel to become clear again
and scanning will continue. The skipped channel will be
reinstated in the scan sequence after 30 seconds
(see Auto Skip on page 10).
If the radio is paused on a busy channel and you want to
remain there, briefly press the SCAN key. The radio will exit
Scan and remain on the busy channel. At this point you will
no longer be monitoring the Priority channel.
To resume Group scanning press the SCAN key again.
If you need to use your Priority channel (for an urgent call),
briefly press the PRI key. The scan will be cancelled and the
radio will jump straight to the Priority channel.
NETWORK SCAN (NET-SCAN)
Net-Scan allows a group of radio users to maintain
communications even when the band is congested. To
achieve this all members of the Net-Scan group must share
a common CTCSS/DCS code and a common set of scan
channels.
Once activated, Net-Scan’s intelligent scanning software
keeps track of clear channels within your scan group. When

TX3500S INSTRUCTION MANUAL PAGE 13
any member of the group transmits, their radio automatically
selects a clear channel to transmit on. Other radios scanning
in the same Net-scan group will lock onto that channel
allowing all members of the group to join the conversation.
If a signal from outside your Net-Scan group appears on the
chosen channel (either with no code or the wrong code), the
group will automatically switch to a new clear channel at the
next transmission. In this way the group can continue
to communicate with minimal interference to or from
other users.
Enabling Net-Scan
Net-Scan is normally switched off by default but can be
enabled through your radio’s Menu.
NOTE: When you enable Net-Scan you will also be prompted
to choose a suitable CTCSS or DCS tone to be used by your
Net-Scan group. All members of your Net-Scan group must
use this same code.
To enable Net-Scan
1. Press and hold the Channel Control to enter the Menu.
‘br’ will be displayed.
2. Press the Channel Control repeatedly until ‘nS’ (Network
Scan) is displayed.
3. Rotate the Channel Control clockwise one click to view
the current setting.
4. Rotate the Channel Control further clockwise to choose
CTCSS tones 01 – 50. When CTCSS tones are selected
flashes.
5. Continue to rotate the Channel Control clockwise past
CTCSS tone 50 to select DCS tones 01 – 104 (A4). When
DCS tones are selected, flashes.
Netscan off
CTCSS indicator
Netscan with CTCSS tone 50
DCS indicator
Netscan with DCS tone 104 (A4).
Since there are 104 DCS tones and only two characters
available to display them, DCS tones 100 to 104 are
labelled A0 to A4 on the display.
6. To disable Net-Scan, rotate the Channel Control fully
counter-clockwise to select OFF. ‘oF’ is displayed.
When finished, press and hold the Channel Control to
return to normal operation.
Selecting Net-Scan
When Net-Scan is enabled, a Network Scan option becomes
available in the scan group selection. To select the Network
Scan option;
1. Press and hold the Channel Control to enter the Menu.
‘br’ will be displayed.
2. Press the Channel Control repeatedly until ‘Sc’ (Scan) is
displayed.
3. Rotate the Channel Control to select ‘nS’
(Network Scan).
When finished, press and hold the Channel Control to
return to normal operation. The radio is now in the Network
Scan mode.
Programming channels into Net-Scan.
All radios in your Net-Scan group must have the same
channels programmed into their Net-Scan memory.
Your radio’s Net-Scan memory has already been factory
programmed with 43 of the available 80 channels. The
remaining 37 channels, which consist of the 32 repeater
input/output channels, 2 telemetry channels and 3 guard-
band channels, have not been included to minimise the risk
of interference to other services on these channels.
To add or remove Net-Scan channels
With Net-Scan mode enabled, select the require channel
using the Channel Control.

PAGE 14 I NSTRUCTION MANUAL TX3500S
•If the channel is currently in the Net-Scan group the
icon will be visible above the channel display. To remove
the channel, hold the SCAN key until a low beep is heard.
will disappear indicating the channel is no longer
in memory.
•If the icon is not visible above the channel display,
the selected channel is not in the Net-Scan memory. To add
it, hold the SCAN key until a high beep is heard. will
appear to confirm the channel is now in memory.
Repeat to add or remove further Net-Scan channels.
IMPORTANT: When adding channels to Net-Scan, please
consider the following:
• The transmitter on your radio is inhibited on channels 22,
23 and channels 61, 62, 63 as required by the ACMA.
This makes these channels unsuitable for use as
Net-Scan channels.
• You should not include any repeater channels unless
you have confirmed that the channel is not allocated to
a repeater in your area. If you add an active repeater
channel into your Net-Scan, you or others in your Net-Scan
group may cause interference to other repeater users on
that channel.
Starting Net-Scan
With Net-Scan mode enabled, press SCAN. A high beep will
be heard and the icon will animate. During this time
the channel numbers will change rapidly as the channels
are scanned
Using Net-Scan
When a member of the group initiates a transmission their
radio will automatically select a clear channel to transmit on.
Other radios scanning in the same Net-Scan group will locate
the transmission by identifying the groups CTCSS/DCS code
and open their Squelch allowing the transmission to be heard
across the entire group. When the transmission ends, all
radios in the group will immediately resume scanning.
If a member of the group responds to the initial transmission,
they will automatically re-use the same channel as long
as the channel remains free of other signals. This allows
the radios in the group to respond more quickly to further
transmissions from others in the group.
If at any time, a signal from outside your Net-Scan group
appears on the channel (either with no code or the wrong
code), the channel will be discarded and a new clear channel
will be selected at the next transmission. The other radios
in the group will then locate the new channel allowing the
conversation to continue seamlessly without any input from
the user.
Ending the scan
To stop scanning, briefly press the SCAN key. A low beep
will be heard and the animated icon will stop. As long
as the radio was not on a busy channel, it will return to the
last channel you selected, otherwise it will stay on the
busy channel.
CTCSS & DCS
The standard Squelch system is fine for quieting the radio
in most applications. However, it operates solely on signal
strength which means that it will always open to any signal
that is strong enough. If the channel is busy with other
stations the Squelch will be constantly opening making it
difficult to determine which calls are meant for you.
CTCSS (Continuous Tone Coded Squelch System) and DCS
(Digital Coded Squelch) are similar Squelch quieting systems
that provide selective audio muting using sub-audible
signalling. When enabled, only signals with a matching
sub-tone will be heard in the speaker. This effectively creates
a channel that is silent to all traffic except those you wish
to hear.
Choosing CTCSS or DCS
The CTCSS system uses 1 of 50 low frequency tones to open
and close the Squelch on the radio. The DCS system is similar
to CTCSS but uses 1 of 104 digital codes to control the
Squelch. There is no difference in performance or function
between the different tone sets so choosing which tone
system to use will largely depend on the other radios you talk
with. If others already use CTCSS or DCS, you should select
the tone system that matches theirs. If the users you talk to
don’t currently use CTCSS or DCS then you can make your

TX3500S INSTRUCTION MANUAL PAGE 15
own choice. Both types are included in the radio to maintain
compatibility with other radio systems.
CTCSS Tone set compatibility
The GME CTCSS tone set comprises a table of 50 tones made
up of the standard CCIR-38 Tone Set plus an additional 12
tones added to the end. If communicating with other brands
of radios that only use the CCIR-38 tone set, please select
from one of the first 38 tones to ensure compatibility with
these radios.
If communicating with other GME radios, you may choose
from any of the 50 tones. However, please refer to the
tone set tables listed in each radio’s Instruction manual
for compatibility because, although the same 50 tones are
available in all GME radios, the tones used in older GME
models may be listed in a different order to those in
your radio.
To enable a CTCSS or DCS code
1. Press and hold the Channel Control to enter the Menu.
‘br’ will be displayed.
2. Press the Channel Control repeatedly until ‘ct’ (CTCSS)
is displayed.
3. Rotate the Channel Control one click. If CTCSS/DCS is
currently switched off, ‘oF’ is displayed.
4. Rotate the Channel Control to the right to select a
CTCSS tone. CTCSS tones are labelled 01 – 50 and are
accompanied by a flashing icon.
5. Continue rotating the Channel Control to the right,
past CTCSS tone 50, to select a DCS code. DCS codes are
labelled 01 – A4 (104) and are accompanied by a flashing
icon.
6. To switch CTCSS/DCS off, rotate the Channel Control to
the left until ‘oF’ is displayed.
When finished, press and hold the Channel Control to
return to normal operation.
NOTE: The tone you select will be used for all channels that
have ‘Silent’ enabled.
Rotate Left Rotate Right
oF CTCSS Tones
1-50 ( )
DCS Tones
1-A4 (104) ( )
Since there are 104 DCS tones and only two characters
available to display them, DCS tones 100 to 104 are
labelled A0 to A4 on the display.
Enabling CTCSS/DCS on a channel (Silent mode)
When ‘Silent’ mode is enabled on a channel, the CTCSS/DCS
system will prevent the Squelch on your radio from opening
unless the incoming signal matches your selected CTCSS/DCS
tone. If other users are using the same channel but are not
using your selected CTCSS/DCS tone, the busy icon will
appear on the display indicating the signal is being received,
however no sound will be heard in the speaker. Only when
someone transmits on the channel using your selected
CTCSS/DCS tone will the Squelch open to allow you to hear
the signal.
Silent mode can be enabled on any channel you choose
(except emergency channel 5/35).
To enable Silent mode on a channel
1. Select the required channel.
2. Press and hold the SQL key until a high beep is heard.
3. An icon (CTCSS) or icon (DCS) will be displayed in
the lower right of the display to indicate Silent mode is
now enabled on that channel.
NOTE: If the CTCSS/DCS tone in your radio has been set to
‘oF’ you will not be able to enable Silent mode.
To disable Silent mode on a channel
1. Select the required channel. An icon (CTCSS) or
icon (DCS) will be displayed indicating Silent mode is
currently enabled on that channel.
2. Press and hold the SQL key until a low beep is heard.
3. The or icon will disappear indicating Silent mode is
now disabled on that channel.

PAGE 16 I NSTRUCTION MANUAL TX3500S
IMPORTANT: When Silent mode is enabled on a channel,
you should always check the busy icon for signs of traffic
on the channel before you transmit to ensure you do not
accidentally transmit over the top of another user.
Busy Lockout
To help prevent accidental transmissions over the top
of other users, the TX3500S incorporates a Busy
Lockout feature.
The Busy Lockout function detects when others outside
your CTCSS/DCS group are transmitting on the channel
and prevents your radio from transmitting over them. If the
channel is busy and you press the PTT the radio will emit a
warning beep and the icon won’t be displayed. When
you release the PTT, look for the icon on the display as
an indicator that the channel is in use. If the channel is busy,
simply wait until the channel is clear and press the
PTT again.
NOTE: You can also press the Monitor key to open the
Squelch and listen for signals on the channel before
transmitting (see Monitor Function directly below).
To enable Busy Lockout
1. Press and hold the Channel Control to enter the Menu.
‘br’ will be displayed.
2. Press the Channel Control repeatedly until ‘bL’ (Busy
Lockout) is displayed.
3. Rotate the Channel Control one click. The current
setting is displayed.
4. Rotate the Channel Control to the right to enable busy
lockout. ‘on’ will be displayed.
5. Rotate the Channel Control to the left to disable busy
lockout. ‘oF’ will be displayed.
When finished, press and hold the Channel Control to
return to normal operation.
Monitor Function
If the busy icon shows that the channel is busy, but
you cannot hear any sound, the signal is probably using a
different CTCSS/DCS tone to yours.
If you wish to listen to the signal to confirm that someone
else is using the channel, press and hold the Volume
control. This activates the ‘monitor’ function which
temporarily disables the CTCSS/DCS system in your radio
to allow the signal to be heard in the speaker. When the
Volume control is released the channel will become
quiet again.
NOTE: While the Volume control is pressed, the icon
flashes.
RECEIVING (RX) ONLY CHANNELS
The radio includes support for up to 19 RX-only dealer
programmable frequencies in the range of 403-520MHz.
RX-only channels, when installed, can be found above
channel 80.
CONFIGURATION MENU
The TX3500S menu provides a convenient method of
customising some of the radio’s functions. The follow
parameters are available.
To access the menu
1. Press and hold the Channel Control. ‘br’ will be
displayed.
2. Press the Channel Control repeatedly until the required
setting ID is displayed.
3. Rotate the Channel Control to select the required option.
When finished, press and hold the Channel Control to
return to normal operation.

TX3500S INSTRUCTION MANUAL PAGE 17
ID DESCRIPTION OPTIONS
br Brightness Rotate for LCD backlight brightness
cL Colour Rotate for LCD backlight colour
Li Lightness Rotate for LCD backlight lightness
bP Key Beep Volume Rotate to adjust key beep volume
ct CTCSS/DCS oF – CTCSS OFF
01 – 50 with icon flashing – CTCSS Tones
01 – A4 with icon flashing – DCS Codes
nS Netscan oF – Netscan OFF
CTCSS Tones 01 – 50 with icon flashing
DCS Codes 01 – 104 (A4) with icon flashing
St Silent Squelch Tail oF – Off (tail is audible)
on – On (tail is silent)
dL Dynamic Volume oF – Off
on – On
Sc Scan Group oS – Open Scan selected
GS – Group Scan selected
nS – Netscan selected (only when Netscan is enabled)
bL Busy Lockout oF – Off
on – On
FL Filter Narrow band Filter selected
Wide Band Filter selected

PAGE 18 I NSTRUCTION MANUAL TX3500S
INSTALLATION
The TX3500S is supplied with a slim, slide on mounting
cradle. The cradle can be screwed or bolted to any
convenient location in your vehicle (under or above the
dash, on the centre console, etc.) using the mounting slots
provided in the cradle.
The TX3500S contains a built-in speaker and should be
installed in a convenient location in the vehicle’s cabin using
the mounting slots provided in the base. For maximum sound
from the internal speaker, we recommend the cradle be
mounted above the radio to minimise any obstruction of
the speaker.
Alternatively the TX3500S can be installed in a less audible
location and an extension speaker used instead. When
installing the radio, avoid mounting it close to heaters or
air conditioners.
Console mounting
A flush mounting DIN adapter MBD001 is available as an
optional accessory. The adapter includes mounting brackets
and a specially designed front panel escutcheon to suit
most vehicle installations. See your nearest GME retailer
for details.
Din Adapter MBD001
When installing the cradle
Avoid mounting close to heaters or air conditioners. Screw
the mounting cradle to a firm surface and slide the TX3500S
into the cradle from the front until it clicks into place. Finally,
connect the power lead and antenna cable to the sockets on
the radio’s rear panel.
Mounting the cradle
Fitting the radio
Slide radio fully into cradle until it ‘clicks’ into place.
Option 1
Option 2

TX3500S INSTRUCTION MANUAL PAGE 19
Removing the radio
Fitting the microphone
The microphone uses a miniature 6 pin telephone style
plug which fits the TX3500S’ microphone socket. The
TX3500S has two microphone sockets – one on the front
panel and one on the rear panel. The microphone can be
plugged into either socket. If connecting the microphone
to the rear socket, an optional extension cable LEM6P is
available to bring the microphone connection to a more
accessible location.
To fit the microphone: Front
1. The front microphone cover is a press fit. To remove, simply
insert the end of a paper clip or similar into the small slot
in the edge of the cover and lift the cover away from
the panel.
2. Place the microphone plug so the plastic tab faces
downwards, then press plug into the socket until
it ‘clicks’.
3. Gently press the rubber strain relief into the hole
surrounding the socket so that the slot around the strain
relief fits neatly inside the lip of the hole.
Lift panel here
Plastic tab
v
Rear
1. The rear microphone cover hinges from the top. Simply
lift the cover from the bottom. The cover will remain
connected to the chassis.
2. Place the microphone plug so the plastic tab faces
downwards, and press the plug into the socket until
it ‘clicks’.
Rear microphone
cover
Lift microphone
cover
Plastic tab

PAGE 20 I NSTRUCTION MANUAL TX3500S
Removing the microphone
1. For front panel connections, squeeze the rubber strain
relief near the front panel to disengage the slot, and slide
the strain relief back along the microphone cord.
2. Squeeze the plastic tab on the microphone plug towards
the plug to unlock it while gently pulling the plug
outwards. If the plug does not come out easily, the tab
has not released correctly and should be squeezed again.
DC POWER CONNECTION
The TX3500S is designed for 13.8 volt DC, negative earth
installations only (i.e. where the negative terminal of the
battery is connected to the chassis or frame of the vehicle).
There are two recommended methods of installation.
Radio remains ON when the ignition switch is OFF
Connect the radio’s negative (black) lead to the vehicle’s
chassis, or if preferred, directly to the battery’s negative
terminal. The radio’s positive (red) lead should be connected
via the 2 amp fuse to the battery’s positive terminal.
Alternatively, the positive lead could be connected into
the fuse box at a point that has +13.8 volts continuously
available (on the battery side of the ignition switch) via the
2 amp fuse.
Radio remains ON when ignition switch is OFF
RED
To Radio
To Radio
Fuse
BLACK
Chassis
Car battery
Ingnition Switch
Radio turns ON and OFF with ignition switch
RED
BLACK
Chassis
Car battery
Ingnition Switch
Radio turns ON and OFF with the ignition switch
Connect the radio’s negative (black) lead to the vehicle’s
chassis, or if preferred, directly to the battery’s negative
terminal. The radio’s positive (red) lead should connect to an
accessory point in the vehicle’s fuse box via the 2 amp fuse.
This point should supply +13.8 volts only when the ignition
switch is turned ON or in the ACCESSORY position via the
2 amp fuse.
Radio remains ON when ignition switch is OFF
RED
To Radio
To Radio
Fuse
BLACK
Chassis
Car battery
Ingnition Switch
Radio turns ON and OFF with ignition switch
RED
BLACK
Chassis
Car battery
Ingnition Switch
HIGH VOLTAGE WARNING
The TX3500S has a built-in, high voltage detection system
to warn you if an over-voltage situation occurs. If the power
supply voltage exceeds 18 volts DC, the channel display will
flash ‘hi dc’ for 5 seconds when the unit is first turned on, or
at the time the voltage exceeds 18 volts. In addition, when
transmitting, the TX indicator will flash and the transmitter
will select low output power.
If the over-voltage warning appears you should switch your
TX3500S OFF and disconnect it from the power source,
before locating the cause of the trouble.
Once the High Voltage warning has been triggered, and you
have fixed the source of the problem, you will need to switch
the TX3500S OFF then ON again to reset it.
The power source must not exceed 30 volts.