GME TX3510 User manual

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5 watt compact fully featured UHF CB radios
INSTRUCTION MANUAL

PAGE 2 INSTRUCTION MANUAL TX3510/TX3520/TX3540
ACCESSORIES SUPPLIED........................................................3
INTRODUCTION ....................................................................3
IMPORTANT INFORMATION CONCERNING UHF CB RADIO....3
FEATURES.............................................................................4
GENERAL OPERATIONS.........................................................5
TX3510/TX3520 Front Panel Controls ............................5
LCD Panel .....................................................................6
Rear Panel.....................................................................6
TX3540 Controller Microphone......................................7
TX3510/TX3520 Microphone.........................................7
TX3540 Controller LCD Panel.........................................7
GENERAL OPERATION ACROSS ALL MODELS.......................8
Keypad Functions ..........................................................8
Volume .........................................................................9
Selecting Channels ........................................................9
Squelch .........................................................................9
Signal Meter..................................................................9
Transmitting ..................................................................9
Time-Out Timer............................................................10
Backlighting ................................................................10
Bandwidth Filter Settings.............................................10
Dynamic Volume Control..............................................11
Voice Scrambler...........................................................11
Repeaters and Duplex Mode........................................11
Priority Channel...........................................................12
Scanning .....................................................................13
CTCSS & DCS ..............................................................15
Selective Calling ..........................................................17
Using Selcall................................................................17
Quiet Mode.................................................................19
Group Calling..............................................................21
Receive (RX) Only Channels .........................................22
Configuration Menu ....................................................24
INSTALLATION ....................................................................26
General .......................................................................26
TX3510 & TX3540 Installation .....................................26
TX3520 Installation .....................................................27
Microphone.................................................................28
DC Power Connection..................................................29
Wiring.........................................................................30
ANTENNA CONNECTION ....................................................30
NOISE SUPPRESSION...........................................................30
CTCSS TONE FREQUENCY CHART........................................31
DCS TONE CHART................................................................32
UHF CB OPERATING FREQUENCIES .....................................33
SPECIFICATIONS .................................................................34
SC CONTRACT WARRANTY AGAINST DEFECTS....................35
Contacts........................................................BACK PAGE
CONTENTS

TX3510/TX3520/TX3540 INSTRUCTION MANUAL PAGE 3
ACCESSORIES SUPPLIED
TX3510 TX3520 TX3540
TX3510 Radio TX3520 Radio TX3540 Radio
Mounting Cradle TX3520 Remote Head Controller Microphone
Instruction Manual Mounting Cradle Microphone extension lead
Microphone Instruction Manual 8 pin to 8 pin Adapter
Microphone Clip Microphone Mounting Cradle
DC Lead Microphone Clip Instruction Manual
Screw Pack DC Lead Microphone Clip
Connecting Cable DC Lead
Screw Pack Screw Pack
INTRODUCTION
Your GME TX3510/TX3520/TX3540 80 channel radio is
Australian designed and built and is the most advanced UHF
Citizen Band radio available. It 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.
Your radio is designed for unobtrusive mounting in modern
vehicles. With its built-in loud speaker and extremely small
size, it can be mounted in almost any convenient location.
IMPORTANT INFORMATION
CONCERNING UHF CB RADIO
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
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.

PAGE 4 INSTRUCTION MANUAL TX3510/TX3520/TX3540
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 going up or down a
few channels from the currently selected channel.
The above situations are not a fault of the radio but a
symptom of operating wideband and narrowband radios in
the same bandwidth. This possible interference will decrease
over time as the population of wideband radios 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 your
radio 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.
FEATURES
•
Microprocessor Controlled Frequency Synthesiser:
Allows user programmable control of scanning, channel
memories and selected feature options.
• Full Spectrum Backlighting: User adjustable, totally
customisable colour backlight settings to match the vehicle’s
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
radio’s performance.
•
Advanced Signal Management (ASM): Identifies
interference caused by strong local signals on adjacent
channels and prevents it from opening your squelch. ASM
also minimises distortion on reception by fine tuning the
receiver frequency to match that of the incoming signal.
This prevents your squelch from opening to unwanted
interference and ensures that incoming signals remain clear
and undistorted even when they are slightly off-frequency.
• Dynamic Volume Control (DVC): Automatically
compensates for variations in received audio level resulting
in a constant audio output level to the speaker.
• Voice Inversion Scrambler
When activated, scrambles your voice so that
communications are only intelligible to others using the
same scrambler technology.
• 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.

TX3510/TX3520/TX3540 INSTRUCTION MANUAL PAGE 5
•
High Contrast Liquid Crystal Display: Fully detailed LCD
provides a visual indication of the selected channel and all
selected functions at a glance.
•User Programmable Receive-Only Channels: Use the
radio’s front panel controls to program up to 95 of your own
receive-only channels (in 5 banks of 19 channels) within the
403-520 MHz frequency range.
•In-Built CTCSS & DCS: User selectable Continuous Tone
Coded Squelch and Digital Coded Squelch System option
provides silent channel operation on individual channels.
• In-Built Selcall with QUIET Mode: Provides selective
calling of individuals or groups with fully user-adjustable
5 tone transmitted Selcall Ident. Also allows alphanumeric
naming of up to 10 Idents for easier caller identification.
•User selectable Wide/Narrow Receive Filter
•Dual Microphone Input Sockets: Front and Rear
Microphone sockets to match most installation needs. Both
sockets can be used independently or simultaneously.
•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.
• Designed and Manufactured in Australia: Totally
designed and manufactured in Gladesville to meet the
demanding needs of the Australian community.
TX3510/TX3520 FRONT PANEL CONTROLS
GENERAL OPERATIONS
Volume Control
Liquid Crystal Display
Channel Switch
Push for Squelch level/
Priorty channel Menu/
Function Scan/ OS-GS
Quiet/
Duplex Squelch/
Alpha
Front Mic Input
PUSH
PRIORITY
MENU
F
PUSH
SQL LVL
SCAN
OS/GS
QUIET
DUP
SQL
ALPHA

PAGE 6 INSTRUCTION MANUAL TX3510/TX3520/TX3540
REAR PANEL
LCD PANEL
Scan Busy Transmit
Quiet Tag
Selcall RX
Selcall/Alpha Display/
Signal Meter/Battery Channel Display Repeater
(Duplex)
DC Power Socket
Quiet
Speaker Socket Antenna Socket Rear Microphone Socket
CTCSS/DCS
Selcall TX

TX3510/TX3520/TX3540 INSTRUCTION MANUAL PAGE 7
TX3540 CONTROLLER MICROPHONE TX3510/TX3520 MICROPHONE
TX3540 CONTROLLER LCD PANEL
Channel
Up
Channel
Down
Push To
Talk
Squelch Set /
Priority
Skip/Call
Channel Up
Push-To-Talk (PTT)
Quiet Tag
Channel Display
Transmit
Busy
Selcall RX
Scan
Selcall/Alpha Display/Signal Meter/Battery Quiet CTCSS/DCS
Skip/Call
Channel Down
Menu/
F Key
Power Key/
Monitor
Quiet/
Duplex
Squelch/
ALPHA
SCAN/
OS/GS
Squelch level/
Priority channel
Microphone
Volume Up
Volume Down
LCD Display
Selcall TX
Repeater (Duplex)

PAGE 8 INSTRUCTION MANUAL TX3510/TX3520/TX3540
GENERAL OPERATION ACROSS ALL MODELS
KEYPAD FUNCTIONS.
TX3510/TX3520 TX3540 FUNCTION
MENU
F
Menu: Press and hold the Menu key to access the configuration menu.
F:Press Fbriefly to access secondary functions in red on the other keys.
SCAN
OS/GS
Scan: Press briefly to toggle scanning.
OS/GS: Press F then OS/GS to select Open or Group Scan modes.
QUIET
DUP
QUIET: Press briefly to toggle the Squelch on or off. Press and hold to tag
quiet channels.
DUP: Press F then DUP to toggle Duplex on the selected
repeater channel.
SQL
ALPHA
SQL: Press briefly to toggle the Squelch on or off. Press and hold to toggle
CTCSS on a channel.
Alpha: Press F then ALPHA to toggle Alpha or Numeric modes.
CHANNEL
PRIORITYSQL LVL
PUSH PUSH
LVL
PRI
Channel: Rotate the Channel knob or press or to change
channels.
SQL: Press the Channel knob or LVL
PRI key briefly to preset the
Squelch level.
Priority Recall: Press Fthen the Channel knob or LVL
PRI key briefly to
recall the Priority channel.
Priority Store: Press and hold the Channel knob or LVL
PRI key to store
the Priority channel.
VOLUME
+
–
PWR
ON/OFF: Rotate the Volume control or press the PWR key to switch
the radio ON or OFF.
Volume: Rotate the Volume control or press the +/- keys to adjust the
volume.
The controls on the TX3510 and TX3520 front panel and
TX3540 controller microphone all have multiple functions. The
primary functions are labelled in BLACK, while the secondary
functions are labelled in RED. To access a primary function
simply press the required key.
To access a secondary function, briefly press the Fkey
followed immediately by the required key.
The table below shows the control functions for all models.

TX3510/TX3520/TX3540 INSTRUCTION MANUAL PAGE 9
NOTE: When using the Fkey to access other functions, Fis
displayed to indicate that ‘Function’ mode is activated. If the
required function is not selected within 5 seconds the Fkey
selection will time out with a low beep and Fwill disappear
from the display.
A more detailed description of these key functions is included
in this ‘General Operation’ section. These instructions describe
the radio functions using the TX3510/TX3520 controls (with the
TX3540 controls shown in brackets).
VOLUME
Rotate the Volume control clockwise past the click (or
press the PWR key) to turn the radio on. Rotate the Volume
control left or right (or press the +or –keys) to adjust 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
To select the required channel, rotate the Channel knob (or
press the or keys). Rotate the knob clockwise (or press
) to select a higher channel or counter clockwise (or press
) 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.
Adjusting the Squelch level
The 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 (or LVL
PRI key). The channel display will show the
current squelch level setting in values from SQL-1 to SQL-9.
Rotate the Channel knob (or press the or keys on
the controller microphone) to change the squelch setting.
A squelch setting of SQL-1 allows the squelch to open on
very weak signals whereas a setting of SQL-9 requires much
stronger signals to overcome the squelch. After adjusting the
squelch sensitivity, briefly press the Channel knob (or LVL
PRI
key) to return to normal operation.
NOTE: The squelch level can be actively adjusted while the
radio is scanning. This allows you to tighten the squelch in
cases where an undesired weak or noisy signal is interrupting
the scan.
SIGNAL METER
The signal meter indicates the relative strength of the
incoming signal in numerical format. Signal strengths are
displayed on the lower left of the Channel Display in values
from 0 to 9. Signals above strength 9 are displayed as 9+.
NOTE: Refer to the Configuration Menu for other options
that can be displayed in this location.
TRANSMITTING
Prior to transmitting, always check the channel is not being
used. This can be done by listening to the channel or by
visually checking that the icon is not visible or the signal
meter is not indicating a signal.
To transmit, press the PTT switch on the microphone. The
icon will appear. Hold the microphone about 5-8 cm from

PAGE 10 INSTRUCTION MANUAL TX3510/TX3520/TX3540
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
The radio has a built-in time-out timer that automatically
limits transmissions to a maximum of 3 minutes of continuous
operation. This feature is required by the ACMA to prevent
accidental blocking of the frequency should your PTT switch
become jammed or be otherwise pressed accidentally. The
time-out period can be changed by your dealer.
When the time-out timer activates, the radio will beep for 5
seconds then the symbol will flash continuously. Normal
operation will be restored once the PTT is released.
BACKLIGHTING
The Liquid Crystal Display and keys are back lit for easy
viewing at night. The backlight remains on while the radio is
switched on.
Adjusting the Backlighting
The backlight brightness and colour can be adjusted for
personal preference.
To make adjustments to the backlighting, press and hold the
Channel knob (or LVL
PRI key) for several seconds. BKLGT
will be displayed indicating the Brightness setting is selected.
Briefly press the Channel knob (or LVL
PRI key) to cycle
through the available settings. Rotate the Channel knob left
or right (or press or ) to adjust the current setting.
There are three back-light settings available;
BKLGT (Brightness Setting): Provides a continuously
variable brightness adjustment from very dim to full
brightness.
COLOR (Colour Setting): Provides a continuously variable
colour spectrum change via a smooth blend of colours.
WHITE (Whiteness Setting): Controls the whiteness or
colour saturation of the selected colour from full colour to
White (no colour).
TIP: For the deepest colour range, reduce the WHITE setting.
After making your selection, press and hold the Channel
knob (or LVL
PRI key) to return to normal operation.
NOTE: The back-light setting function will automatically time
out after 6 seconds if no further adjustments have been made.
BANDWIDTH FILTER SETTINGS
To accommodate the blending of the newer narrowband UHF
CB 80 channel plan with the original 40 channel wideband
system, your radio is fitted with two user-selectable receiver
bandwidth filters. While either of these will provide superb
receive audio, selecting the wide filter will further increase
the tolerance of the receiver to 40 channel wideband radios
that might otherwise sound over-modulated or slightly off
frequency on channels 1 – 40. Selecting the narrow receive
filter will increase the selectivity of the radio to strong
interfering signals from adjacent channels.
To select the desired filter, press and hold the MENU key
to enter the menu, then press the MENU key repeatedly
until NBFLT (Narrowband Filter) or WBFLT (Wideband
Filter) is displayed. Rotate the Channel knob (or press
or ) to make the desired selection.
When finished, briefly press the PTT to exit from the
Menu.
Narrowband lter selected
Wideband lter selected

TX3510/TX3520/TX3540 INSTRUCTION MANUAL PAGE 11
NOTE: The wideband receiver filter setting is only applied
to channels 1 – 40. Channels 41 – 80 always use the
narrowband filter.
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 incoming 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.
Your radio 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 activate the Dynamic Volume Control, press and hold
the MENU key to enter the menu, then press the MENU key
repeatedly until DVCOF (Dynamic Volume Control Off) or
DVCON (Dynamic Volume Control On) is displayed. Rotate
the Channel knob (or press or ) to make the desired
selection.
When finished, briefly press the PTT to exit from the Menu
Dynamic Volume Control ON
Dynamic Volume Control OFF
VOICE SCRAMBLER
Your radio incorporates a simple voice scrambler using band
inversion. The scrambler is compatible with the majority of
scramblers used by other manufacturers, allowing you to enjoy
scrambled communications with owners of non-GME radios.
Once the scrambler has been activated your transmission and
reception will only be intelligible to others using the same
scrambler technology.
To enable or disable the voice scrambler:
1. Press and hold the Menu key until the radio beeps.
2. Briefly press the Menu key repeatedly until ENCOF or
ENCON is displayed.
3. Rotate the Channel knob (or press or ) to make your
selection. Select ENCON to activate the scrambler encoder
or ENCOF to disable it.
4. Press the PTT to exit the menu.
Scrambler Encoder OFF Scrambler Encoder ON
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
retransmit them on another channel. Repeaters are usually
mounted on hills or tall buildings. The increase 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 radio 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 radio 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.

PAGE 12 INSTRUCTION MANUAL TX3510/TX3520/TX3540
Your radio 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.
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
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 be
displayed.
2. Briefly press the DUP key. The duplex symbol will
disappear from the display accompanied by a low beep.
IMPORTANT: Channels 1-8, 31-38, 41-48 and 71-78 should
only be used in Simplex mode if there are no repeaters in or
near your location that operate on the selected channel. In
particular, avoid operating in Simplex mode on any of the
repeater input channels 31-38 and 71-78 unless you are
absolutely sure that there are no repeaters in range using that
channel. Inadvertently transmitting on an active repeater input
frequency in simplex mode could cause interference to other
users on that repeater that would not be audible to your radio.
PRIORITY CHANNEL
The priority channel feature allows you to instantly recall any
one of the 80 channels in your radio. 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. Briefly press Fthen press and hold the Channel knob (or
LVL
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 Fthen briefly press the Channel knob (or
LVL
PRI key). The radio will immediately switch to the priority
channel and PRI will be displayed for a few seconds.
NOTE: If the radio was scanning when the priority channel
was recalled, the scan will be cancelled.

TX3510/TX3520/TX3540 INSTRUCTION MANUAL PAGE 13
SCANNING
Your radio incorporates a scan function that allows a selected
group of channels to be scanned for activity. Channels are
scanned at a rate of 20 channels per second. If a signal is
detected on a channel, the scan will pause to allow the signal
to be heard. Once the channel has been clear for 5 seconds
the scan will resume.
Scan Groups
Your radio supports two scan groups – Open Scan and
Group 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
switch 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
Group Scan allows you to transmit and receive on your
priority channel, but during periods of inactivity, the
radio will also scan a group of other channels. Signals
received on the priority channel will have precedence
over those received on the other channels. Similarly,
pressing the PTT while scanning will cause the radio to
revert to the priority channel. Once the priority channel
has been clear for 5 seconds the scan will resume.
Example: Scanning channels 1 – 8 with priority
channel 20 in Group Scan
1 - 2 - 3 - 4 - 20 - 5 - 6 - 7 - 8 - 20
Selecting a Scan Group
To switch between Open or Group Scan modes, briefly press F
then press OS/GS. Open or Group will be displayed to the left
of the channel display for a few seconds.
To add or remove channels from the scan memory
1. Check that the radio isn’t already scanning. If it is, briefly
press the SCAN key to cancel the scan.
2. Select the required channel.
3. Check to see if the scan symbol is displayed on
that channel.
I. If is displayed, the selected channel is already
in the scan memory. Press and hold the SCAN key to
remove it. will disappear.
II.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.
Quick select
To quickly switch between channels that have been stored in
the current scan memory, briefly press the Fkey then rotate
the Channel knob (or press or keys). This will allow
you to manually step through only those channels that have
been stored in the current scan group memory. During this
time Fwill remain on the display to confirm you are still in
‘Quick Select’ mode. To exit this mode, press the Fkey again
or wait 10 seconds for the function to time out.
This option can be used to quickly jump between channels of
interest or to quickly review which channels are in the scan
memory for editing purposes.
Scanning in Open Scan mode
Briefly press the SCAN key. A high beep will be heard and
the scan symbol will animate. During this time the channel
numbers will scroll rapidly as the channels are scanned.
NOTE: If there are less than 2 channels programmed into the
scan memory when you press SCAN, a low beep will sound
and the command will be ignored.
If a busy channel is located, the scan will pause to allow you
to hear the signal but will continue to animate on the display
to indicate that the scan function is still active. Once the
channel has been clear for 5 seconds, the scan will resume.
If you don’t wish to listen to a busy channel you can skip over
it by pressing the Skip button on the microphone or rotating
the Channel knob (or press or ). Scanning will resume
at the next available channel in memory.

PAGE 14 INSTRUCTION MANUAL TX3510/TX3520/TX3540
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 talk on your working channel while scanning, simply press
the PTT. The scan will pause and your radio will switch to
your working channel allowing you to transmit and receive on
that channel. Once your communication has finished and the
channel has been clear for 5 seconds, scanning will resume.
If your radio pauses on a busy channel
other than your
working channel and you wish to talk on that channel, simply
press the PTT during a break in the conversation. The busy
channel 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.
Scanning in Group Scan mode
Group scan mode is slightly different to Open Scan mode
in that the Group Scan allows you to communicate on your
Priority channel while continuing to scan a number of other
channels. The receiver will scan the other channels ONLY
WHILE THERE ARE NO SIGNALS ON THE PRIORITY CHANNEL.
Channel
Signals being received 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 always
transmit on the Priority channel.
Setting up Group Scan
1. See the ‘Selecting a Scan Group’ section on page 13 to
select the Group Scan mode.
2. Store your preferred Priority channel as outlined under
‘Priority Channel’ on page 12.
3. Program the required ‘other’ channels into the scan group
memory as described above under ‘To add or remove
channels from the scan memory’ on page 13.
To Scan in the Group Scan mode, briefly press the SCAN
key. A high beep will be heard and the scan symbol
will animate. During this time the channel numbers will scroll
rapidly as the selected channels are scanned with the Priority
channel being 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 3 short
beeps will be heard. The radio will now stay on the priority
channel for as long as the channel remains busy. During this
time you can transmit and receive on the priority channel in
the usual way. Once the priority channel has been clear for 5
seconds the radio will resume scanning the other channels.
If a signal appears on one of the other channels, 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 on any channel
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 the scan pauses on a busy channel and you don’t wish to
listen to that conversation, rotate the channel switch and the
radio will skip that channel and resume scanning.
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 bust channel. At this point you will no
longer be monitoring the priority channel.
To resume scanning press the SCAN key again.
To exit the scan mode and go directly to the priority channel at
any time, press Fthen PRI.
Scan Group options
By default your radio has one Open Scan mode and one Group
Scan mode. There may be applications where you have no
need to monitor a priority channel and would prefer to have

TX3510/TX3520/TX3540 INSTRUCTION MANUAL PAGE 15
two separate Open Scan modes. Alternately you may prefer
to have two separate Group Scan modes with different scan
channels in each. Your radio can be programmed to convert
the Group Scan into an Open Scan and vice versa. If this is
required, please contact your GME retailer to arrange for this
feature to be activated.
When two Open Scan or two Group Scan modes are enabled,
the Scan Group selection screen will display O1 and O2 for the
Open Scan groups or G1 and G2 for the Group Scan groups.
See the section ‘Selecting a Scan Group’ on page 13.
NOTE: Enabling or disabling the second Open or Group
Scan mode is not a user selectable option. Once enabled or
disabled, the new scan mode becomes a permanent part of
your radio’s features. If you decide later that you need the
original Scan mode settings restored you will need to return
your radio to your GME retailer for re-programming.
CTCSS & DCS
The standard squelch system is fine for quietening 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 which can
make it difficult to determine which calls are meant for you.
CTCSS/DCS provides additional selective receiver audio muting
using sub-audio 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 who
use the same subtone as you.
Choosing CTCSS or DCS
CTCSS uses a continuous analogue sub tone while DCS uses a
digitally encoded sub tone. 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 own choice. There is
no difference in performance or function between the different
tone sets. Both types are included in the radio to maintain
compatibility with other radio systems.
CTCSS tone set
There are two CTCSS tone sets available – the basic 38 tone
set or the extended 50 tone set (see the CTCSS tone chart
at the rear of this manual). Both are included to ensure
compatibility with other radios.
To switch between CTCSS tone sets;
1. Switch the radio OFF.
2. Press and hold the SQL key while switching the radio
ON again.
3. CTC38 or CTC50 will appear briefly.
NOTE: When switching between tone sets, if you already have
a CTCSS tone selected, the radio will try to match the original
tone frequency with one in the new table. If there is no tone
match, the CTCSS tone will be set to OFF and you will need to
select a new tone.
DCS tone set
There are 104 DCS tones available (see the DCS tone chart at
the rear of this manual).
To Select a CTCSS or DCS tone
1. Select any UHF CB channel 1 – 80 (excluding 5 and 35).
2. Press and hold the Menu key until the radio beeps. The
CTCSS Menu option will be displayed.
3. If CTCOF is displayed, CTCSS/DCS tones are currently
switched off (default). To enable CTCSS tones, rotate the
Channel knob to the right (or press ). CTCSS tones will
be displayed as CTC01 – CTC50.
4.
Continue rotating the Channel knob (or press
repeatedly) to scroll past the last CTCSS tone (38 or 50) to
access the DCS tones. DCS tones are displayed as
DT001 – DT104.
Press or rotate left
CTCSS Off CTCSS Tone 50 DCS Tone 104
Press or rotate right

PAGE 16 INSTRUCTION MANUAL TX3510/TX3520/TX3540
5. To see the actual sub tone instead of the tone label, briefly
press the Channel knob (or LVL
PRI key). For CTCSS tones
the tone frequency will be displayed in Hz. For DCS tones
the tone Code will be displayed. Press the Channel knob
(or LVL
PRI key) again to return to the CTCSS/DCS label (refer
to the CTCSS and DCS Tone Charts on pages 31–32.
CTCSS Label CTCSS Sub tone Frequency
6. To switch CTCSS/DCS tones Off, rotate the Channel knob
fully to the left (or press repeatedly) until CTCOF is
displayed.
To exit the menu, briefly press the PTT or wait for the menu
to time-out.
NOTE: The selected CTCSS/DCS tone will be used globally on
any channels that have CTCSS enabled.
Enabling CTCSS/DCS on a channel (Silent mode)
Enabling CTCSS/DCS on a channel will prevent the squelch
from opening unless the incoming signal matches your
selected CTCSS/DCS tone. Other users on the same channel
who are not using your CTCSS/DCS tone will still be received
by your radio (the icon will still appear on the display) –
but their voice will not be heard in the speaker. Only when
someone transmits on the channel using your CTCSS/DCS
tone will the squelch open to allow the signal to be heard.
Channels where CTCSS/DCS have been enabled are said to be
in ‘Silent mode’.
NOTE: Silent mode can be enabled on any channel except
emergency channels 5 and 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: You cannot enable Silent mode unless a CTCSS or DCS
tone has been selected in the Configuration Menu. If CTCSS/
DCS has been set to OFF, Silent mode is inhibited.
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 enabled.
2. Press and hold the SQL key until a low beep is heard.
3. The (CTCSS) or (DCS) icon will disappear to indicate
Silent mode has been removed from that channel.
IMPORTANT: When Silent mode is enabled on a channel
you should always check the icon for signs of traffic on the
channel before transmitting to ensure you do not accidentally
transmit over the top of another user. Alternatively, you can
enable Busy Lockout in the Configuration Menu which
will automatically prevent your radio from transmitting if the
channel is already in use
Monitor function
When the current channel is in Silent Mode, the icon
may appear but no sound will be heard in the speaker. This
indicates that your radio is receiving a signal that does not
match your CTCSS/DCS tone. If you wish, you can briefly
monitor the channel as described below. This temporarily
disables Silent mode, allowing the signal to be heard.
On the TX3510 and TX3520, press and hold the Volume
knob to monitor signals on the channel. When you release
the Volume knob, Silent mode is restored and the radio will
become quiet again.
On the TX3540 briefly press the PWR key.
Note: On the TX3540 you will only have a brief moment to
monitor the channel for signals as holding the PWR key for
more than a few seconds will switch the radio off.

TX3510/TX3520/TX3540 INSTRUCTION MANUAL PAGE 17
SELECTIVE CALLING
Overview
Your radio has a Selective Calling system known as Selcall that
operates like a telephone. Your radio is pre-programmed with
its own unique Selcall Identification number. If this number
is called by another radio, your radio will beep to alert you. If
you do not want to hear any other activity while waiting on a
channel, you can select the QUIET mode. Your radio will then
remain quiet to all incoming signals until your Selcall number
is called.
Your radio will allow you to store up to ten of your most
frequently called Selcall numbers in memory and each number
can be labelled for easy identification.
Selcall identification number
Your radio is factory programmed with its own unique Selcall
Identification Number (Ident). This number identifies your
radio from others in your area. Your radio’s own Selcall Ident
will be displayed for a few seconds to the left of the channel
display when you first turn the radio on. You will need to
make your Ident known to anyone who may need to call you
using Selcall.
NOTE: Although your radio is factory-programmed with a
unique Selcall Ident, you can change your Ident to another
number if required (see Selcall Memories on next page).
Selcall Ident labels
When storing Selcall Idents, you can add labels to each one
to make it easier to identify whose Ident you are recalling. In
addition, if an incoming Selcall matches one of your stored
Idents, the label can be displayed instead of the Ident.
To add or display labels, your radio must be in the ALPHA
mode. To switch between ALPHA mode and NUMERIC mode,
briefly press the Fkey followed by the ALPHA key. ‘ALPHA’ or
‘NUMBER’ will be displayed briefly to the left of the channel
display to indicate the selected mode.
The QUIET mode
Your radio can be set to monitor signals on a busy channel but
remain QUIET unless it receives its own Selcall Ident. In this
way, you won’t be disturbed unless someone calls you. When
your Selcall Ident is received, the QUIET mode is deactivated
and an alarm sounds to alert you to the call. You can then
converse normally on the channel. To use the QUIET mode,
refer to the QUIET mode section further below.
NOTE: The QUIET mode overrides the normal Squelch system
to ensure that the radio remains quiet even when the channel
is busy. When QUIET is set, you may see the icon appear
on the display indicating the channel is being used. However,
unless someone transmits your Selcall Ident, nothing will be
heard in the speaker.
You can activate the QUIET mode on individual channels i.e.
some channels can be set to remain Quiet while others can
remain open to all incoming signals.
USING SELCALL
Entering a Selcall Ident
1. Press the CALL button. is displayed, along with the
last sent or received Selcall Ident. If an ALPHA label is
displayed you will need to press Fthen ALPHA to switch to
Numeric mode.
2. Press and hold the Channel knob (or LVL
PRI key) until the
radio beeps. The right-hand digit of the Selcall Ident
will flash.
3. Rotate the Channel knob (or press or ) to select the
required number in the flashing digit position.
4. Briefly press the Channel knob (or LVL
PRI key) again to
select the next digit position.
5. Repeat steps 4 and 5 to enter all 5 digits as required. The
Selcall number is now ready to send.
6. Press and hold the CALL button. A long beep will be heard
and the radio will transmit the Selcall Ident.
NOTE: If the call is not sent within 10 seconds of entering the
last Ident digit the Call function will time out and the radio will
return to normal mode. To exit the mode without sending
the Selcall briefly press the CALL button

PAGE 18 INSTRUCTION MANUAL TX3510/TX3520/TX3540
Call acknowledge
If your Selcall transmission is successful, the radio you called
should respond with an ‘acknowledge’ signal - usually two
quick beeps. This will confirm to you that the radio you called
is now alerting its user to your signal.
Selcall memories
Your radio is fitted with one ‘Call’ memory and 10 user
programmable Selcall memories labelled ‘C0’ to ‘C9’ There is
also one additional location labelled ‘Id’.
Memory locations ‘C0’ to ‘C9’ are for storing frequently called
Selcall Idents. The additional location labelled ‘Id’ contains
your radio’s own Selcall Ident. You should only select this
memory location if you need to change your radio’s factory
programmed Selcall Ident.
To store a Selcall Ident in memory
1. Briefly press the CALL button. is displayed along with
the last sent or received Selcall Ident.
2. Rotate the Channel knob clockwise (or press ) to select
the required Ident memory location ‘C0’ to ‘C9’ (or select
‘Id’ to change your radios own Selcall Ident). If an ALPHA
label is displayed you will need to press Fthen ALPHA to
switch to Numeric mode.
3. Press and hold the Channel knob (or LVL
PRI key) until the
radio beeps. The right-hand digit of the Selcall Ident
will flash.
4. Rotate the Channel knob (or press or ) to select the
required number in the flashing digit position.
5. Briefly press the Channel knob (or LVL
PRI key) again to
select the next digit position.
6. Repeat steps 4 and 5 to enter all 5 digits as required.
7. Now press and hold the Channel knob (or LVL
PRI key).
The entire Ident will flash for a few seconds then the radio
will beep as the new Ident is stored.
e.g. Programming Call Memory C5
Recalling Selcall Idents
1. Briefly press the CALL button. is displayed along with
the last sent or received Selcall Ident.
2. Rotate the Channel knob (or press or ) to select the
required Ident memory in locations ‘C0’ to ‘C9’.
3. Press and hold the CALL button to send the Ident.
Naming your Selcall Idents
Your radio allows you to label each Selcall Ident using a 5
character name to make it easier to identify callers. If an
incoming Selcall matches one of those in your radio’s memory,
the label can be displayed instead of the Selcall Ident.
NOTE: Before adding an ALPHA label to a Selcall Ident, you
must first store the required Ident in memory as described left.
1. Briefly press the CALL button. will be displayed along
with the last sent or received Selcall Ident.
2. Rotate the Channel knob (or press or ) to select the
required Ident memory in locations ‘C0’ to ‘C9’.
3. Briefly press the Fthen ALPHA to select the ALPHA mode.
ALPHA will be displayed briefly.
4. If the ALPHA label is empty, ‘- - - - -’ will be displayed,
otherwise it will display the last ALPHA label programmed
into that memory.
5. Press and hold the Channel knob (or LVL
PRI key) until the
radio beeps. The left-hand position of the Alpha label
will flash.
6. Rotate the Channel knob (or press or ) to select the
required character in the flashing position then briefly press
the Channel knob (or LVL
PRI key) again to select the
next position.

TX3510/TX3520/TX3540 INSTRUCTION MANUAL PAGE 19
7. Repeat step 6 to enter up to 5 characters as required.
8. Now press and hold the Channel knob (or LVL
PRI key).
The entire Alpha label will flash for a few seconds then the
radio will beep as the label is stored.
e.g. Labelling Call memory C5
Repeat steps 2 to 8 to add ALPHA labels to any other
Selcall Idents stored in memory. The following characters are
available;
Letters A B C D E F G H I J K L M N O P Q R
S T U V W X Y Z
Numbers 0 1 2 3 4 5 6 7 8 9
Punctuation . <space> * + -
To exit the CALL TO mode, briefly press the CALL button
(or simply wait for the Call function to time out). The radio will
return to normal operation.
To display the Alpha labels of incoming Selcalls, the
radio should be left in Alpha mode. Any incoming Selcall that
does not match those in the memory will display -NEW-. To
display the Selcall Ident of that caller, briefly press Fthen
ALPHA to return to the NUMERIC mode.
Receiving Selcalls
When your radio receives its Selcall Ident, an alarm will sound
to alert you to the call. Initially the alarm will beep urgently
at 2 beeps per second, then, if the call is not answered, it will
slow to around 1 beep every 3 seconds. It will then continue to
beep indefinitely until you cancel it.
In addition to the alarm, the symbol will appear on the
display along with the callers Selcall Ident or ALPHA label to
inform you of the caller’s identity.
Incoming call showing Selcall Ident
Incoming call showing Alpha label
To return the call:
Press and hold the CALL button for a few seconds until the
radio beeps. The callers Selcall will be sent back to the caller.
To cancel the alarm:
Briefly press the PTT switch. The alarm will be cancelled and
the channel will be open for normal communication. You can
now talk on the channel in the usual way.
QUIET MODE
The QUIET mode mutes the receiver to prevent incoming
signals from being heard in the speaker until your Selcall Ident
is received. In this way you can monitor a busy channel for
personal calls without being disturbed by unwanted signals. If
your Selcall Ident is received, the QUIET mode is cancelled and
all incoming signals are heard in the speaker.
Setting up the QUIET mode
To setup the QUIET mode you must first ‘tag’ the channels
that you want to stay Quiet, then activate the QUIET mode.
Once the QUIET mode is activated, tagged channels will
remain Quiet to all incoming signals unless your Selcall Ident is
received. Channels not tagged will remain open to all signals
and will operate normally.
To tag individual channels for QUIET operation:
1. Select the required channel.
2. Press and hold QUIET until the radio beeps. ‘Q’ will appear
to the left of the channel number indicating the selected
channel is now tagged for Quiet operation.

PAGE 20 INSTRUCTION MANUAL TX3510/TX3520/TX3540
To remove the QUIET tag from individual channels:
1. Select a channel that has been tagged for Quiet operation.
‘Q’ will be displayed.
2. Press and hold QUIET until the radio beeps. ‘Q’ will
disappear indicating this channel is no longer tagged for
Quiet operation.
Activating the QUIET mode
1. Select a channel that has been tagged for Quiet operation
(you cannot activate the Quiet mode unless you have
selected a ‘tagged’ channel). ‘Q’ will be displayed.
2. Briefly press QUIET. will appear on the display.
Now all channels that were tagged for Quiet operation will be
operating in the Quiet mode.
De-activating the QUIET mode
1. Select any channel that has been tagged for Quiet
operation. ‘Q’ and will be displayed.
2. Briefly press QUIET. will disappear from the display and
all channels that were tagged for Quiet operation will now
operate normally again.
Receiving signals in the QUIET mode
•If a normal signal is received on a QUIET channel, the
channel will appear busy (the icon will be visible) but no
sound will be heard from the speaker.
•If a normal signal is received on an Open channel (one that
is not tagged with ‘Q’) the signal will be heard in the
usual way.
•If your Selcall Ident is received on any channel - Open or
QUIET - the QUIET mode will be cancelled and the alarm will
beep to alert you to the call. In addition, the caller’s Ident or
ALPHA label will be displayed. All channels will now be open
for normal transmission and reception.
If you wish to respond to the caller using Selcall, press and
hold the CALL button until the radio beeps. The caller’s Ident
will be transmitted back to them causing the alarm in their
radio to be activated.
To cancel the alarm on your radio, briefly press the PTT.
To return your radio to the QUIET mode, briefly press
QUIET. will re-appear on the display.
Scanning in the QUIET mode
The radio will allow you to scan while the QUIET mode is
active. Using this feature you can monitor a group of Quiet
channels or a combination of Quiet and Open channels.
To Scan in the QUIET mode:
1. Pre-select the required OS or GS scan group (briefly press F
then OS/GS).
2. Program your scan channels as described under the
Scanning section.
3. From those channels, select the ones you wish to remain
Quiet and tag each one for QUIET operation (press and
hold QUIET).
4. Select a tagged channel and activate the Quiet mode
(briefly press QUIET).
5. Press the SCAN key. The radio will begin scanning and
‘SCAN’ and will be displayed, indicating the radio is
scanning in the QUIET mode.
Receiving signals while scanning in the QUIET mode
•If a normal signal is received on an open channel, scanning
will pause while the channel is busy and will resume
scanning 5 seconds after the channel becomes clear. (If you
were scanning in Group Scan mode, the radio may switch
between the open channel and the Priority channel - this is
normal).
•If a normal signal is received on a Quiet channel but your
Selcall Ident is not detected, the signal will be ignored and
scanning will continue.
•If a signal containing your Selcall Ident is received on any
channel - Open or Quiet - both scanning and QUIET modes
will be cancelled and the receiver will stay on that channel.
In addition, the alarm will beep to alert you to the call
and the callers Ident or ALPHA label will be displayed. The
channel will now be open for normal transmission and
reception.