GME TX3340 User manual

INSTRUCTION MANUAL
Super compact remote mic 5 watt 80 channel UHF CB radio

PAGE 2 INSTRUCTION MANUAL TX3340
INTRODUCTION ................................................................................. 3
IMPORTANT INFORMATION................................................................ 3
EMERGENCY CHANNELS.................................................................... 4
TELEMETRY CHANNELS...................................................................... 4
FEATURES.......................................................................................... 4
GENERAL OPERATION........................................................................ 5
MC520B Microphone/Controller................................................. 5
Function Keys............................................................................. 5
Volume Key................................................................................ 5
Selecting Channels..................................................................... 5
Keylock Feature.......................................................................... 5
Transmitting............................................................................... 5
Squelch Control ......................................................................... 6
Squelch Sensitivity...................................................................... 6
Priority Channel ......................................................................... 6
Duplex Operation....................................................................... 6
CTCSS & DCS..................................................................................... 7
Selecting the CTCSS or DCS Tone................................................ 7
Enabling CTSS/DCS on a Channel............................................... 7
Disabling CTCSS/DCS on a Channel............................................ 8
Monitoring the Channel ............................................................. 8
SCANNING ........................................................................................ 8
Scan Groups .............................................................................. 8
Selecting a Scan Group .............................................................. 8
Programming Scan Channels...................................................... 8
OPEN SCAN MODE ............................................................................ 9
Using Scan in the Open Scan Mode............................................ 9
GROUP SCAN MODE.......................................................................... 9
Setting Up the Group Scan......................................................... 9
Scanning in the Group Scan Mode.............................................. 9
Using Two Group Scan or Two Open Scan Modes...................... 10
SELECTIVE CALLING......................................................................... 11
Selcall Indentification Number.................................................. 11
Selcall Ident Names.................................................................. 11
Quiet Mode (Q)........................................................................ 11
Selcall Memories...................................................................... 11
USING SELCALL ............................................................................... 11
Entering a Selcall Ident............................................................. 12
Sending Sellcall........................................................................ 12
Call Acknowledge .................................................................... 12
Storing Selcall Idents................................................................ 12
Recalling Selcall Idents from Memory........................................ 12
Naming Your Selcall Idents ....................................................... 13
Displaying ALPHA Names ......................................................... 13
Entering and Storing a Selcall Name......................................... 13
Changing Your Own Selcall Ident.............................................. 13
To Exit ‘Call To’ Mode............................................................... 14
Receiving Selcalls..................................................................... 14
Cancelling the Selcall Alert ....................................................... 14
Quiet Mode ............................................................................. 14
Scannning in Quiet Mode......................................................... 15
GROUP CALLING.............................................................................. 16
Programming and Sending Group Calls .................................... 16
MENU SETTINGS.............................................................................. 17
Setting the Squelch Sensitivity .................................................. 17
CTCSS & DCS........................................................................... 18
Backlighting............................................................................. 19
Display Colour ......................................................................... 19
Battery / S-Meter / ALPHA Selection.......................................... 19
Beep........................................................................................ 19
INSTALLATION ................................................................................. 19
Antenna Installation................................................................. 20
DC Power Connection .............................................................. 21
High Voltage Warning .............................................................. 22
Antenna Connection ................................................................ 22
CTCSS TONE FREQUENCY CHART..................................................... 23
DCS TONE CHART............................................................................. 24
UHF CB OPERATING FREQUENCIES .................................................. 25
SPECIFICATIONS .............................................................................. 26
SC CONTRACT WARRANTY AGAINST DEFECTS................................. 27
CONTENTS

TX3340 INSTRUCTION MANUAL PAGE 3
INTRODUCTION
Your GME TX3340 80 channel is Australian designed and built
and is the most advanced UHF Citizen Band radio available.
The TX3340 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 TX3340 with its Controller Microphone is designed for
unobtrusive mounting in modern vehicles. The radio case
with its built-in loud speaker and extremely small size can be
mounted in almost any convenient location.
NOTE: The Citizens Radio Service is licenced in Australia by
ACMA Radiocommunications (Citizens Band Radio Stations)
Class Licence and in New Zealand by MED General User Radio
Licence for Citizens Band Radio and operation is subject to
conditions contained in those licences.
IMPORTANT INFORMATION
CONCERNING 80 CH 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.
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
ACCESSORIES SUPPLIED
• Main Radio Unit
• Mounting Cradle
• Instruction Manual
• MC520B LCD Microphone
• Microphone Clip
• DC Lead
• Screw Pack
If any items are missing or
damaged, please contact your
retailer or place of purchase .

PAGE 4 INSTRUCTION MANUAL TX3340
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
TX3340 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
•Controller Microphone: Complete control of the radio from
the microphone simplifies installation.
•Microprocessor Controlled Frequency Synthesiser: Allows
user programmable control of scanning, channel memories
and selected feature options.
•Programmable Scan Function: Scans the programmable
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.
•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.
•Priority Channel: A user programmable priority channel
feature allows your working or local repeater channel to be
instantly recalled at the press of a button.
•High Contrast Liquid Crystal Display: Fully detailed LCD
provides a visual indication of the selected channel and all
selected functions at a glance. Backlit for viewing at night.
•In-Built Selcall: Selective Calling with five digit ANI and fully
user-adjustable 5 tone transmitted Selcall Ident. Also allows
naming of Idents for easier caller identification.
•Quiet Mode: Selectable on individual channels, Quiet mode
prevents incoming signals from being heard on selected
channels unless preceded by your Selcall code.
•CTCSS & DCS: A built-in Continuous Tone Coded Squelch
and Digital Coded Squelch System option provides quiet
channel operation.
•Overvoltage 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.

Channel Up
Push-To-Talk (PTT) Skip/Call
Channel Down
Menu / F Key
Power Key
Quiet/Duplex
Key
Squelch/ALPHA
Key
SCAN/OS/GS
Key
PRI Key/KeylockMicrophone
Volume Up Key
Volume Down Key
LCD Display
TX3340 INSTRUCTION MANUAL PAGE 5
•Designed and Manufactured in Australia: The TX3340 has
been totally designed and manufactured in Gladesville NSW
to meet the demanding needs of the Australian community
GENERAL OPERATION
MC520b MiCroPhone/Controller
FunCtion Keys
There are several keys beneath the microphone controller’s
display that have both primary and secondary functions. Their
primary functions are printed in Black while their secondary
functions are printed in Red.
To access the primary functions
Simply press the required key. e.g. To control the Squelch,
briefly press the SQL key.
To access the secondary functions
Press the red Fkey followed immediately by the required red
coloured key.
NOTE: If the secondary key is not pressed within 10 seconds
the Fkey selection will be cancelled.
VoluMe Key
Press the +key to increase the volume and the –key to
decrease the volume.
NOTE: At minimum volume setting there is still sufficient
volume to be heard in a quiet cabin environment.
seleCting Channels
Press the or keys to step upwards or step downwards
one or more channels.
KeyloCK Feature
The key locks the keys on the microphone to prevent
unintentional key presses from altering your TX3340 settings.
While the keys are locked, only the PTT (Push-To-Talk), SQL
key, on/off, Volume keys, the Fkey and the (Keylock) key
will continue to function.
To lock the keys
Briefly press the
F key, then press and hold the key until a
high beep is heard. ‘LOCK’ will appear briefly on the display.
To unlock the keys
Briefly press the
F key, then press and hold the key until a
low beep is heard. ‘ULOCK’ will appear briefly on the display.
transMitting
Prior to transmitting, always check the channel is not being used.
This can be done by either listening or by checking the ‘Busy’
indicator is not lit.
To transmit, press the PTT button. 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.
IMPORTANT: Always listen to ensure the channel is free
before transmitting.

PAGE 6 INSTRUCTION MANUAL TX3340
squelCh Control
Squelch control is used to eliminate the background noise
when there are no signals present. The TX3340 features a
preset Squelch system. The Squelch sensitivity has been factory
set to provide optimum performance in most environments,
however the sensitivity can be altered by the user if required,
to suit varying environmental situations.
The Squelch can be opened or closed with the SQL key. When
the Squelch is open, the receiver’s background noise can be
heard and ‘BUSY’ is displayed. When the Squelch is closed, the
receiver remains quiet when there are no signals present but
an incoming signal 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. If there
are no signals present you will hear the receiver’s background
noise.
To close the Squelch
Briefly press the SQL key again. A high beep will be heard and
the receiver will become quiet.
NOTE: If an incoming signal is very weak and is close to the
minimum squelch level, it may become broken or ‘chopped’ by
the squelch action. To prevent this, simply open the Squelch
to allow the signal to be heard clearly. Alternatively you can
reduce the Squelch sensitivity as described below.
squelCh sensitiVity
The sensitivity of the Squelch to incoming signals can be set to
suit your operating environment. For example, excessively noisy
environments may cause the Squelch to open on local noise.
The TX3340 has nine (9) preset Squelch sensitivity settings that
can be selected using the MENU function.
To adjust the pre-set Squelch sensitivity, please refer to the
MENU
SETTINGS on page 17.
Priority Channel
The Priority Channel feature allows you to store one of the
channels as a Priority Channel that can be instantly recalled at
the press of a key. This can be used to provide instant access
to your working channel or your local repeater channel.
To store a Priority Channel
1. Select the required channel.
2. Press and hold the PRI key until a high beep is heard. The
selected channel will be stored.
To recall a Priority Channel
Briefly press the PRI key. The radio will switch straight to
the selected Priority Channel. Any active functions (such as
scanning or Quiet) will be cancelled.
DuPlex oPeration
Duplex operation allows the radio to transmit on a different
frequency to that which it receives allowing operation through
repeater stations. Repeaters automatically re-transmit your
signal over a wider area, providing greatly increased range.
Duplex operation operates only on channels 1-8 and 41-48.
When duplex is selected on these channels, the radio receives
on that channel but actually transmits 30 channels higher.
e.g.
Vehicle
Simplex/Duplex Range Comparison
Simplex
Repeater
operation
Channel 31
Channel 1
Repeater
Station
Channel 1
Channel 31
Vehicle

TX3340 INSTRUCTION MANUAL PAGE 7
* Emergency Channel only
The TX3340 allows you to select Duplex operation individually
on each channel.
To select Duplex on individual channels
1. Select the required channel 1-8 or 41-48
2. Briefly press the Fkey then press the DUP key. ‘DUP’ will
appear on the display accompanied by a high beep.
To remove Duplex from a channel
1. Select the required channel 1-8 or 41-48. ‘DUP’ will be
visible on the display.
2. Briefly press the Fkey then press the DUP key. ‘DUP’ will
disappear from the display accompanied by a low beep.
CTCSS & DCS
CTCSS (Continuous Tone Coded Squelch System) and DCS
(Digitally Coded Squelch) are Squelch quieting systems that
allow several groups of users to share the same channel
without disturbing each other. They use a preset sub-audible
(very low frequency) tone to open and close the Squelch
on your radio. There are three optional tone sets available,
compromising 38. 50 or 104 user-selectable tones. The system
applies a continuous low-level tone to your transmission
and uses a matching tone decoder to control your receiver’s
Squelch. With CTCSS or DCS enabled, the channel remains
quiet to all incoming signals unless they carry the correct tone.
When a transmission with the correct tone is received, the
Squelch opens and remains open for as long as the signal is
present. When the transmission ends, the channel becomes
quiet again. Transmissions that do not use the correct tone
will not be heard. The TX3340 allows CTCSS or DCS to be
enabled or disabled on individual channels.
NOTE: The CTCSS/DCS tone you select will be used for all
CTCSS/DCS enabled channels in your radio.
seleCting the CtCss or DCs tone
To pre-select the CTCSS or DCS tone on your radio, please refer
to the MENU
SETTINGS on page 18.
enabling CtCss/DCs on a Channel
Once a CTCSS/DCS tone has been selected, it can be enabled
on individual channels.
1. Press the or keys to select the required channel.
2. Press and hold the SQL key. A high beep will be heard and
‘SILENT’ will appear on the display.
You may activate CTCSS/DCS on as many channels as you wish
except channel 5 which is designated for emergency use.
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

PAGE 8 INSTRUCTION MANUAL TX3340
Disabling CtCss/DCs on a Channel
Repeat steps 1 and 2 above. A low beep will be heard and
‘SILENT’ will disappear from the display.
NOTE: You will not be able to activate CTCSS/DCS if the
CTCSS/DCS tone is set to ‘OF’.
Please see the CTCSS and DCS Tone Frequency Charts on
pages 23 and 24.
Monitoring the Channel
It is useful to be able to temporarily open your radio’s Squelch
to allow you to listen for signals from other CTCSS/DCS
users outside your group. Because their CTCSS/DCS tone is
different to yours, your Squelch would normally remain closed,
preventing you from hearing them. You can use the SQL key
to open the Squelch and listen to the channel to check that
it is clear before transmitting. This will help prevent you from
accidentally transmitting over the top of others.
To monitor the channel
Briefly press the SQL key. If there are no signals present, you
will hear the usual hiss of an empty channel. Press the SQL
key again to restore the Squelch to its previous setting.
SCANNING
The TX3340 has a SCAN function that allows groups of user
programmable channels to be scanned for signals. Channels can
be scanned at 20 channels per second. When a signal is found,
scanning will pause on that channel to allow the signal to be
heard, then resume scanning when the channel is clear again.
sCan grouPs
The TX3340 features two scan groups by default - Open Scan
and Group Scan.
Open Scan
Allows any of the installed channels to be scanned for activity.
If a busy channel is found, scanning will pause to allow the
signal to be heard. Once the channel has been clear for 5
seconds, scanning will resume automatically.
e.g. Scanning channels 1-8 in Open Scan.
Group Scan
Also allows any of the installed channels to be scanned for
activity, but in addition, it inserts your Priority Channel into the
scan sequence. This means that your Priority Channel will be
monitored regularly while scanning to ensure that no calls are
missed. Any signals received on your Priority Channel will take
precedence over any signals received on the other channels.
e.g. Scanning channels 1-8 with Priority Channel 20 in
Group Scan.
seleCting a sCan grouP
To pre-select a scan group
The radio is initially set to Open Scan mode. To toggle
between Scan Groups, press the Fkey followed by the OS/
GS key. ‘OPEN’ or ‘GROUP’ will be displayed briefly to confirm
your selection.
PrograMMing sCan Channels
Your TX3340 is supplied with all 40 UHF CB channels
programmed into the Open Scan memory. Any channels not
needed, can be removed if required. The Group Scan memory
is empty by default and you will need to add channels to it
before use.
To add or remove channels from either scan memory
1. Ensure that the radio is not already scanning. If it is, briefly
press the SCAN key to cancel the scan function.
2. Ensure you have the required scan group pre-selected.
3. Select the required channel by using the or keys
• If ‘M’ is visible to the right of the channel number, the
selected channel is already in the scan memory.
21 345678
21 3 4 20 5 6 7 8 20

TX3340 INSTRUCTION MANUAL PAGE 9
•If ‘M’ is not visible, then the selected channel is not in
the memory.
• To add or remove the selected channel, press and hold
the SCAN key for a few seconds until a beep is heard.
4. Repeat step 3 to add or remove other channels in the
scan memory.
To start scanning
To begin scanning, briefly press the SCAN key. A high beep
will be heard, ‘SCAN’ will appear in the display and the radio
will begin scanning. In addition the selected scan group will be
displayed below the channel number.
NOTE: If there is only one channel programmed into the Open
Scan memory or none in the Group Scan memory, a long low
beep will be heard when you press the SCAN key and the
command will be ignored.
To stop scanning
To cancel the scan, briefly press the SCAN key. A low beep will
be heard and ‘SCAN’ will disappear from the display.
OPEN SCAN MODE
using sCan in the oPen sCan MoDe
•If a busy channel is found, scanning will pause on that
channel 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 your radio pauses on a busy channel and you don’t wish
to listen to that conversation, briefly press the SKIP button
on the microphone. The radio will skip over that channel
and resume scanning from the next channel in the sequence.
•If your radio is paused on a busy channel and you wish to
remain there, briefly press the SCAN key. The radio will exit
Scan mode and remain on the busy channel.
•To transmit while paused on a busy channel, wait until the
channel is free, then press the PTT button. The radio will
exit Scan mode and remain on the busy channel. You can
now converse on that channel in the usual way. When you
have finished your conversation, briefly press the SCAN key to
resume scanning.
• If your radio is scanning and you need to use your Priority
Channel (for an urgent call or an emergency), briefly press
the PRI key. The Scan mode will be cancelled and the radio
will jump straight to the Priority Channel.
NOTE: In Open Scan mode your TX3340 will not allow you
to transmit while it is scanning. If the PTT button is pressed
while scanning, the radio will give a low beep and will ignore
the command. Your radio will only transmit while scanning is
paused on a busy channel.
GROUP SCAN MODE
Group Scan allows you to transmit and receive normally on
your Priority (working) Channel, while continuing to scan
several other channels. 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 button at any time, the radio will
transmit on the Priority Channel in the usual way.
setting uP the grouP sCan
Referring to the appropriate sections of this manual:
1. Pre-select the Group Scan mode.
2 . Store your preferred working channel into the Priority
Channel memory (see Priority Channel).
3. Program the required ‘other’ channels into your Group Scan
memory (see Programming Scan Channels).
sCanning in the grouP sCan MoDe
To scan in the Group Scan mode, briefly press the SCAN key.
A high beep will be heard, ‘SCAN’ will appear in the display
and the radio will begin scanning.

PAGE 10 INSTRUCTION MANUAL TX3340
NOTE: If there are no channels programmed in the Group
Scan memory when you press the SCAN key (or there is only
one channel programmed and it is the same as the Priority
Channel), a low beep will be heard and the command will
be ignored.
When scanning, the TX3340 scans all the channels
programmed into the Group Scan memory, with the Priority
Channel being scanned after every fourth channel (retailer
programmable option, if you require different timing for your
priority channel, please contact your retailer).
• If a signal appears on the Priority Channel - at any time - the
receiver will switch straight to the Priority Channel and will
stay there for as long as the channel is busy. During this
time you can transmit on the Priority Channel in the usual
way. Once there has been no activity 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 for signals every 2 seconds,
resulting in a series of small ‘breaks’ in the reception of the
paused channel. Once there has been no activity on any
channel for 5 seconds, the radio will resume scanning.
• If your radio pauses on a busy channel and you don’t wish
to listen to that conversation, briefly press the SKIP key on
the microphone. The radio will skip over that channel and
resume scanning from the next channel in the sequence.
•If your radio is paused on a busy channel and you wish to
remain there, briefly press the SCAN key. The radio will exit
Scan mode and remain on the busy channel.
NOTE: The radio will no longer be monitoring the Priority
Channel (unless it is the same as the busy channel). To
resume scanning, press the SCAN key again.
• To transmit on the Priority (working) Channel AT ANY TIME,
simply press the PTT key while the radio is scanning. The
radio will switch straight to the Priority Channel. When
you have finished your conversation and there has been no
further activity on the Priority Channel for 5 seconds, the
radio will resume scanning the other channels.
•To go directly to the Priority Channel, briefly press the PRI
key. The radio will exit Scan mode.
using two grouP sCan or two oPen sCan
MoDes
If you prefer, the TX3340 can be re-programmed to have two
Group Scan modes or two Open Scan modes instead of one
of each.
For example there may be applications where you have no
need to scan the Priority Channel and would prefer to have
two separate Open Scan modes. Alternatively you may have
applications where you prefer to have two Group Scan modes
with different Scan groups in each.
Your TX3340 can be retailer programmed to convert the Group
Scan mode into a second Open Scan mode and vice versa. If
you would prefer to have two Group Scan or two Open Scan
modes, you should contact your GME retailer to arrange for
this feature to be enabled (when using two Group Scan modes
the Priority Channel will be the same channel for both
scan groups).
When the second Open or Group Scan mode is enabled, the
resulting two Scan modes become Scan 1 and Scan 2.
To select the required scan mode
Press the ‘F’ key followed by the OS/GS key. ‘Scan 1’ or ‘Scan
2’ will be displayed to confirm your selection. When enabled,
the two scan modes will be identical in operation.
NOTE: Enabling or disabling the second Open or Group Scan
mode is not a user selectable option. Once enabled by your
GME retailer, the changed Scan mode becomes a permanent
part of the TX3340’s features and replaces the standard Scan
selection. If you find later that you need the original Group or

TX3340 INSTRUCTION MANUAL PAGE 11
Open Scan function re-enabled, you will need to return your
TX3340 to your retailer for re-programming.
SELECTIVE CALLING
Your TX3340 has a Selective Calling system known as Selcall
that operates like a telephone. Your radio is pre-programmed
with its unique Selcall Identification Number. If this number is
called by another radio, your TX3340 will beep to alert you.
If you do not want to hear any other activity while waiting
on a channel, you can select QUIET mode. This will force the
radio to remain quiet to all incoming signals until your Selcall
number is called.
Your TX3340 will allow you to store up to ten (10) of your
most frequently called Selcall numbers. Each number can be
labelled with a 5-letter name for easy identification.
selCall iDentiFiCation nuMber
Your TX3340 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, directly beneath 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. Whenever your TX3340 hears a
Selcall signal, it compares the incoming Ident with its own. If
the two Idents match, the radio knows it is being called and
sounds an alarm to alert you, otherwise the call is ignored.
NOTE: Although your radio’s Selcall Ident is pre-programmed
at the factory, you can change it if required. See CHANGING
YOUR OWN SELCALL IDENT on page 13.
selCall iDent naMes
When storing Selcall Idents, the TX3340 allows you to add
a 5 character name to each one, making it easier to identify
whose Ident you are recalling from the memory. In addition,
if an incoming Selcall matches one of the Idents stored in the
memory, the name can be displayed to make it easier for you
to identify the caller.
quiet MoDe
Your TX3340 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
a signal containing your Selcall Ident is received, QUIET mode
is deactivated and an alarm sounds to alert you to the call. You
can then converse normally on the channel.
QUIET mode operation is described later in this manual.
NOTE: 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 ‘BUSY’ 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 QUIET mode on individual channels i.e. some
channels can be set to remain quiet while others can remain
open to all incoming signals.
TIP: Setting QUIET mode is not mandatory. You can still use
Selcall on any channel whether the QUIET mode is set or not.
selCall MeMories
Your TX3340 is fitted with one Call memory and 10 Selcall
Ident memories. The 10 Selcall Ident memories are used to
store frequently used Selcall Idents. The additional Call memory
holds the Ident you last sent or received. The memories can be
viewed by briefly pressing the CALL key. The initial memory
displayed is the Call memory. Pressing the or keys
will step through the other 10 Selcall storage memories in
sequence. Selcall memories are labelled ‘c0’ to ‘c9’.
USING SELCALL
NOTE: The ACMA requires that cumulative Selcall
transmissions should not exceed 3 seconds in any 60 second
period. To meet this requirement with your TX3340 you should
not send any more that 3 Selcall transmissions per minute.

PAGE 12 INSTRUCTION MANUAL TX3340
entering a selCall iDent
1. Press the CALL button. ‘CALL TO’ is displayed, along with
the last sent or received Selcall Ident. The radio is now in
‘CALL TO’ mode.
NOTE: If an ALPHA label is displayed you will need to switch
to NUMERIC Mode. To toggle between ALPHA mode and
NUMERIC mode, briefly press the Fkey followed by the
ALPHA key.
2. Enter the required Selcall ident as follows:
(a) Press and hold the PRI key until the radio beeps. The
right-hand digit of the Selcall Ident will flash.
(b) Press the or keys to select the required number in
the flashing digit position.
(c) Briefly press the PRI key again to select the next
digit position.
(d) Repeat steps (b) and (c) to enter all 5 digits as required.
The Selcall number is now ready to send.
senDing selCall
With the Selcall number displayed, press and hold the CALL
button for 2 seconds. 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 mode will time out and the radio will
return to normal mode. To exit CALL TO mode without sending
the Selcall briefly press the CALL button.
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.
storing selCall iDents
Your TX3340 is fitted with 10 user programmable Selcall
Ident memories, allowing you to store up to 10 frequently
used Selcall Idents. The memories are accessed by pressing
the CALL button, then the or keys to scroll through the
memories. Ident memories are labelled ‘c0’ to ‘c9’.
To store a Selcall Ident in memory
1. Press the CALL button to select the CALL TO mode. ‘CALL
TO’ is displayed along with the last sent or received Selcall
Ident.
2. Press the or keys to select the required Ident memory
(locations ‘c0’ to ‘c9’).
TIP: If the radio displays letters instead of numbers in the
Selcall Ident position, your radio is in ALPHA mode. To switch
back to NUMERIC mode, briefly press the Fkey followed
immediately by the ALPHA key. ’NUMER’ will be displayed for
a few seconds in the Ident position.
3. With the required memory location displayed, enter the
Selcall ident as follows:
(a) Press and hold PRI key until the radio beeps.
The right-hand digit of the Selcall Ident will flash.
(b) Press the or keys to select the required number in
the flashing digit position.
(c) Briefly press the PRI key again to select the next
digit position.
(d) Repeat steps (b) and (c) to enter all 5 digits as required.
(e) Now press and hold the PRI key. The entire Ident will
flash for a few seconds then the radio will beep as the
new Ident is stored.
reCalling selCall iDents FroM MeMory
1. Press the CALL button to select the CALL TO mode. ‘CALL
TO’ is displayed along with the last sent or received
Selcall Ident.
2. Press the or keys to select the required Ident memory
in locations ‘c0’ to ‘c9’.

TX3340 INSTRUCTION MANUAL PAGE 13
3. When the required Selcall Memory is displayed, press and hold
the CALL button to send the Ident.
naMing your selCall iDents
The TX3340 allows you to name each Selcall Ident using a 5
character ALPHA name. The name is stored in memory along
with the Ident making it easier to identify whose Ident you are
recalling from the memory. If an incoming Selcall matches one
of those in your radio’s memory, the name can be displayed
instead of the Selcall Ident.
DisPlaying alPha naMes
To display the Selcall’s ALPHA Name
You must have the radio’s ALPHA display mode selected.
To toggle the ALPHA display mode
Briefly press the Fkey followed by the ALPHA key. ‘ALPHA’
or ‘NUMER’ will be displayed for 2 seconds below the channel
display to indicate the selected mode.
TIP: The normal channel display may give no indication of
which display mode is selected. The selected mode will only
become obvious when displaying Idents.
entering anD storing a selCall naMe
NOTE: You should first store the required Ident in memory as
described above under Storing Selcall Idents.
1. Ensure the ALPHA mode is selected (briefly press the Fkey
followed by the ALPHA key to toggle ALPHA mode).
2. Briefly press the CALL button. The CALL TO mode will be
selected and the last-sent Selcall memory location will
be displayed.
3. Press the or keys to select the required Selcall
memory (locations c0 to c9). If no ALPHA name has been
programmed for that memory the radio will probably display
‘- - - - -’ otherwise it will display the last ALPHA name
programmed into that memory.
4. With the required memory location displayed, enter the
required ALPHA name as follows:
(a) Press and hold the PRI key until the radio beeps. The
left-hand character of the ALPHA name will flash.
(b) Press the or keys to select the required letter in
the flashing character position.
The following characters are available:
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
0 1 2 3 4 5 6 7 8 9
SPACE * -
(c) Briefly press the PRI key again to select the next
character position.
(d) Repeat steps (b) and (c) to enter all 5 characters
as required.
(e) Now press and hold the PRI key. The entire ALPHA
name will flash for a few seconds then the radio will
beep as the name is stored.
Repeat the procedure to add ALPHA names to any other Selcall
Idents stored in memory.
Changing your own selCall iDent
To change your radio’s own Selcall Ident:
1. Ensure your radio is in Numeric Mode (press F, ALPHA
repeatedly until ‘NUMER’ is displayed).
2. Press the CALL button. ‘CALL TO’ is displayed along with
the last send or received Selcall Ident.
3. Press the button. ‘ID’ will be displayed along with your
radio’s own Selcall Ident.
4. Press and hold the PRI key until the radio beeps. The right
hand Selcall digit will flash.
5. Press the or buttons to select the required number in
the flashing digit position.

PAGE 14 INSTRUCTION MANUAL TX3340
6. Briefly press the PRI key again to select the next
digit position.
7. Repeat steps 5. and 6. to change further digits in your
Selcall Ident.
When you have the required Selcall Ident displayed, press and
hold the PRI key until the radio beeps. The new Ident will be
saved.
to exit ’Call to’ MoDe
While in the CALL TO mode, briefly press the CALL button. The
radio will return to normal operation.
NOTE: The radio can be left in the ALPHA display mode so
that an incoming Selcall matching one of those in the radio’s
memory will display the name associated with that Selcall Ident
instead of the Ident itself. Any incoming Selcalls not matching
those in the memory will display ‘-NEW-’. To display the Selcall
Ident of that caller, briefly press the Fkey followed by the
ALPHA key to return to the NUMERIC display mode.
reCeiVing selCalls
When your TX3340 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 for around 10 seconds then
slow to around 1 beep every 3 seconds if the call is not
answered. It will then continue to beep indefinitely until you
cancel it (the way your TX3340 handles the Selcall alert can be
altered by your retailer).
In addition to the alarm, the words ‘CALL FROM’ will appear
on the display along with the callers Selcall Ident or ALPHA
name to inform you of the identity of the person calling.
To switch between the Selcall Ident and the
ALPHA name
Briefly press the Fkey followed by the ALPHA key.
CanCelling the selCall alert
The following are the recommended methods:
To cancel the alarm and talk on the channel
Press the PTT key and talk in the usual way. The alarm
will be cancelled and the channel will be open for normal
communication.
To return the call
Press and hold the CALL key for a few seconds until the radio
beeps. The callers Selcall will be sent to the caller.
To cancel the alarm and listen on the channel
Briefly press the QUIET key (if QUIET has been activated). The
alarm will stop beeping and the channel will remain open to
any incoming signals.
quiet MoDe
QUIET mode mutes the TX3340’s receiver to prevent any
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 radio will exit QUIET mode
and all incoming signals will be heard in the speaker.
Setting up QUIET mode
To setup QUIET mode you must first ‘tag’ the channels that
you want to stay quiet, then activate the QUIET mode. Once
QUIET mode is activated, the channels you have tagged 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 by pressing the or keys.
2. Press and hold the QUIET key until the radio beeps. ‘Q’
will appear to the right of the channel display indicating the
selected channel is now tagged for quiet operation.

TX3340 INSTRUCTION MANUAL PAGE 15
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 the QUIET key until the radio beeps. ‘Q’ will
disappear indicating this channel is no longer tagged for
quiet operation.
Activating QUIET mode
1. First, select a channel that has been tagged for quiet
operation (you cannot activate quiet mode unless you have
selected a ‘tagged’ channel). ‘Q’ will be displayed.
2. Now briefly press the QUIET key. ‘QUIET’ will appear on
the display.
Now all channels that were tagged for quiet operation will be
operating in the QUIET Mode.
Deactivating QUIET mode
1. Select any channel that has been tagged for quiet operation.
‘Q’ and ‘QUIET’ will be displayed.
2. Briefly press the F key followed by the QUIET key. ‘QUIET’
will disappear from the display and all channels that were
tagged for quiet operation will now operate normally again.
Receiving Signals in QUIET mode
•If a normal signal is received on a QUIET channel, the
channel will appear busy (the ‘BUSY’ indicator will be
visible) but no sound will be heard from the speaker. This
means you will not be disturbed by the signal.
•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 a signal containing your Selcall Ident is received on any
channel (Open or QUIET) QUIET mode will be cancelled and
the alarm will beep to alert you to the call. In addition, the
caller’s Ident or ALPHA name will be displayed. All channels
will now be open for normal transmission and reception.
If you wish to respond to the calling radio using Selcall, press
and hold the CALL key for 1.5 seconds until the radio beeps.
The callers 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 key.
To return your radio to the QUIET mode
Briefly press the QUIET key. ‘QUIET’ will re-appear on
the display.
sCanning in quiet MoDe
The TX3340 will allow you to scan while 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 QUIET mode
1. Pre-select the Scan mode. (Open/Group/Scan 1/Scan 2)
2. Select the channels you wish to scan and store them in the
Scan memory.
3. From those channels, select the ones you wish to remain
quiet and tag each one for QUIET operation.
4. Select a tagged channel and activate QUIET Mode
(press the QUIET key).
5. Press the SCAN key. The radio will begin scanning and
‘SCAN’ and ‘QUIET’ will be displayed, indicating the radio is
scanning in QUIET mode.
Receiving signals while scanning in 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.

PAGE 16 INSTRUCTION MANUAL TX3340
•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 name will be displayed. The
channel will now be open for normal transmission
and reception.
TIP: To ensure reliable Selcall detection when scanning in the
QUIET mode, it is recommended that you restrict the number of
channels in the Scan group to 4 or less.
GROUP CALLING
The TX3340’s Selcall system includes a Group Call function
which allows you to call up to 1000 radios simultaneously.
This can be useful in an emergency situation where you may
need to transmit a message to a large number of radios in
your group.
By default, your radio is factory-set to allow up to 10 radios to
be called at once. If your application requires more, you can
arrange for your retailer to re-program this option to allow 100
or 1000 radios to be called. The following description assumes
the default Group Call setting of 10 radios.
The Group Call function works by allowing you to enter a
special ‘group code’ into the last digit position of the Selcall
Ident you are sending. The ‘group code’ appears as ‘A’ when
displayed in the radio. When this ‘group code’ is received, it
substitutes for all other numbers in the last digit position. As
long as the first 4 digits of the Selcall you are sending match
those of the radios you are calling, their Selcall alarm will be
activated as if their full 5 digit Selcall Idents had been received.
To achieve this, the 10 radios you are calling must be
programmed with sequentially numbered Selcall Idents.
e.g. 12330, 12331, 12332, 12333 . . --> , 12339
•Transmitting the Selcall Ident 12331 will only activate the
alarm in the radio with the Selcall Ident of 12331.
•Transmitting 1233A will activate the alarms in all radios
with Idents 12330 through 12339 (a total of 10 radios).
If the radios in your fleet do not have sequentially numbered
Selcall Idents and you want to make use of this function, you
can arrange for your retailer to re-program the Selcall Idents in
your radios.
PrograMMing anD senDing grouP Calls
The process for entering a Group Call Ident is the same as
entering a normal Selcall Ident.
1. Press the CALL button. ‘CALL TO’ is displayed, along with
the last sent or received Selcall Ident.
2. Enter the required Selcall ident as follows:
(a) Press the PRI key until the radio beeps. The right-hand
digit of the Selcall Ident will flash.
(b) Press the or keys to select ‘A’ in the flashing digit
position. This is the special code that will create the
Group Call.
(c) Briefly press the PRI key again to select the next
digit position.
(d) Repeat steps (b) and (c) to enter the other 4 digits
as required. The last digit will be set to ‘A’.
Once the Ident has been entered you have 10 seconds to send
it otherwise the CALL TO mode will be cancelled and the Ident
you entered will be lost.
NOTE: Where your TX3340 allows it, programming group calls
for 100 radios is identical except that you will need to select
‘A’ for the last two digits (e.g. 123AA). For 1000 radios you
will need to select ‘A’ for last three digits (e.g. 12AAA).
e.g.
100 Radios Ident Sent: 123AA Idents called: 12300 -> 12399
1000 Radios Ident Sent: 12AAA Idents called: 12000 -> 12999

TX3340 INSTRUCTION MANUAL PAGE 17
To send the Selcall Ident
With the required Selcall Ident displayed in the CALL TO mode,
press and hold the CALL button for a few seconds until the
radio beeps. The Selcall Ident will be sent automatically and
the radio will return to normal operation.
Call acknowledge in Group mode
There is no call acknowledge when sending group calls. This is
to prevent all the radios in your group from trying to respond
to your Selcall transmission at the same time.
Storing Group Call Idents
Group Call Idents can be stored in memory in the same way as
a standard Selcall Ident.
Receiving Group Calls
Receiving a Group Call is identical to receiving a normal Selcall
except that the alarm sound is a LOW tone beep instead of the
normal HIGH tone beep. The Callers’ Ident or ALPHA Name
appears on the display in the usual way.
MENU SETTINGS
The MENU feature provides a convenient method of
customizing or storing some of the radio’s functions.
The following Menu Options are available.
To access the Menu functions
1. Press and hold the MENU key. The first Menu function
is displayed.
2. Briefly press the MENU key again to cycle through each
available function in the order listed above. After the last
function has been selected, the cycle returns to
the beginning.
3. Press the or keys to alter the parameters of the
selected function.
4. Press and hold the MENU key to exit and store any changes.
setting the squelCh sensitiVity
The sensitivity of the Squelch to incoming signals can be set
to suit your operating environment. In quiet rural locations
a low setting will allow the weakest signals to be received
while still keeping the radio quiet between transmissions. In
city locations, a higher setting might be needed to ensure
the squelch remains closed when subjected to the higher
interference levels often encountered in high density areas.
The TX3340 has nine (9) preset Squelch sensitivity settings
(labelled SQL-1 to SQL-9) that can be selected using the Menu
function. The minimum Squelch setting (SQL-1) is the most
sensitive and will allow the Squelch to open on weak signals.
SQL-9 is the maximum setting, requiring very strong signals to
open the squelch. The factory default is SQL-3 which generally
provides reliable Squelch operation for most applications.
To pre-select the Squelch sensitivity
1. Select a Channel between 1 and 80.
2. Press and hold the MENU key until the radio beeps. SQL-x
will be displayed where x is a number from 1 to 9.
3. Press the or keys increase or decrease the preset
squelch to the desired setting.
4. Press and hold the MENU key to store the new setting.
100 Radios Ident Sent: 123AA Idents called: 12300 -> 12399
1000 Radios Ident Sent: 12AAA Idents called: 12000 -> 12999
Menu Settings
Squelch
CTCSS / DCS
Backlight
Display Colour
S-Meter / Battery
Beep

PAGE 18 INSTRUCTION MANUAL TX3340
CtCss & DCs
CTCSS (Continuous Tone Coded Squelch System)
CTCSS is a squelch quieting system that allows several groups
of users to share the same channel without disturbing each
other. It uses one of a set of sub-audible (very low frequency)
tones to open and close the squelch on your radio.
There are two CTCSS tone sets, one comprising 50 tones and
the other comprising 38 tones. Both tone sets are installed in
the TX3340 to ensure compatibility with other radio systems.
For more details, see CTCSS Tone Frequency Chart on
page 23.
To toggle between the CTCSS 50 tone set and the CTCSS 38
tone set:
1. Switch the radio off.
2. Press and hold the SQL key while switching the radio
on again.
3. CTC50 or CTC38 will be displayed indicating which tone set
has been selected.
NOTE: When switching from CTC38 to CTC50 the radio will
retain the currently selected CTCSS tone but will update the
associated tone set number to reflect its new location in the
CTC50 tone set table.
e.g. CTCSS tone frequency of 233.6 Hz is tone #36 in the
CTC38 tone set table but changes to tone #47 when
CTC50 is selected.
When switching down from CTC50 to CTC38, if there is no
equivalent CTC38 tone frequency the CTCSS tone will be set to
oF and you will need to reselect a new tone.
DCS (Digitally Coded Squelch)
DCS is a squelch quieting system similar to CTCSS, that uses
low frequency digital signals instead of one continuous low
frequency tone. As with CTCSS, it also allows several user
groups to share the same channels without disturbing each
other. There are 104 DCS codes available. See DCS Tone
Chart on page 24.
Selecting a CTCSS or DCS tone
Choosing which tone to use will probably be dependent on
the other radios you talk to. If you talk to others outside your
group who already use CTCSS or DCS tones, you will need
to select the tone set and frequency that matches theirs. The
TX3340 includes most of the commonly used tone sets.
If the users you talk to don’t currently use CTCSS or DCS
you can make your own choice. There is no difference in
performance or function between the different tone sets.
To select a CTCSS or DCS tone
NOTE: When selecting tones, CTCSS tones are prefixed with
‘CTC’ and DCS tones are prefixed with ‘DC’.
1. Press and hold the MENU key until the radio beeps.
2. Briefly press the MENU key repeatedly until ‘CTCxx’ or
‘DCxxx’ is displayed (where xx represents a tone number in
the CTCSS/DCS Tone Frequency Chart).
3. Press the or keys to scroll through the tone list and
select the required CTCSS or DCS tone. Scroll upwards for
DCS tones and downwards for CTCSS tones.
If you wish to view the CTCSS frequency or DCS tone instead
of the table number, briefly press the PRI key. To return to
the table code briefly press the PRI key again or wait for it
to time-out.
4. To disable CTCSS or DCS tones altogether scroll to the
bottom of the list and select ‘CTCoF’.
5. To store the setting, press and hold the MENU key until the
radio beeps.

TX3340 INSTRUCTION MANUAL PAGE 19
baCKlighting
Backlighting can be set to HIGH, LOW or OFF to satisfy your
personal preference.
1. Press and hold the MENU key until the radio beeps.
2. Briefly press the MENU key repeatedly until ‘LIGHT’
is displayed.
3. Press the key to increase the backlight or the key to
decrease the backlight.
4. Press and hold the MENU key until the radio beeps, to store
the setting.
DisPlay Colour
The colour of the back light display can be changed to suit your
installation environment.
To change the back light colour:
1. Press and hold the MENU key until the radio beeps.
2. Briefly press the MENU key repeatedly until ‘COLOR’
is displayed.
3. Press the or keys to cycle through Yellow, Red or
Green back light colours.
4. Press and hold the MENU key until the radio beeps to store
the settings.
battery / s-Meter / alPha seleCtion
The TX3340 has the option of displaying either the battery
voltage or the incoming signal strength (S-meter) in the area
beneath the channel display.
To display S-meter or battery voltage
1. Press and hold the MENU key until the radio beeps.
2. Briefly press the MENU key repeatedly until ‘S-MET’ (S
Meter) or ‘bATT’ (Battery) is displayed.
3. Press the or keys to select your preferred choice of
S-MET or bATT.
4. Press and hold the MENU key until the radio beeps, to store
the setting.
beeP
To adjust the volume level of the keypad beeps:
1. Press and hold the MENU key until the radio beeps.
2. Briefly press the MENU key repeatedly until ‘BEEP’ is
displayed.
3. Press the or keys to adjust the beep volume. The
default setting is ‘3’.
4. To store the setting, press and hold the MENU key until the
radio beeps.
INSTALLATION
The TX3340 main unit is supplied with a slim, U-shaped
mounting cradle. The cradle can be screwed or bolted in 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 TX3340 contains a built-in speaker, and
should be installed in a convenient location in the vehicle’s
cabin as the radio’s loud speaker. Alternatively it can be
installed in a less audible location and an extension speaker
used instead.
The LCD Controller Microphone comes complete with a
mounting clip. Its small size and light weight design allows it
to be mounted in almost any convenient position accessible to
the driver.
When installing the radio, avoid mounting it close to heaters
or air conditioners. Screw the LCD Controller Microphone’s clip
to a firm surface. Fit the TX3340 into the cradle and tighten
the gimbal knobs. Place the LCD Controller Microphone in its
mounting clip. Finally, plug the LCD Controller Microphone
into the front panel of the TX3340 and the power and antenna
leads to the sockets provided on the rear of the radio.

PAGE 20 INSTRUCTION MANUAL TX3340
antenna installation
It is essential to select a good quality, high efficiency, 477 MHz
antenna. A poor quality antenna or one not designed for the
specific frequency band you are using will give very
poor performance.
GME have a wide range of suitable 477 MHz UHF CB antennas
to suit most installations and applications. We recommend
contacting your local GME retailer for advice.
Connect to the antenna cable to the rear antenna socket using
a PL259 coaxial connector.
Noise Suppression
The inherent design of FM transceivers result in a high level
of resistance to ignition and electrical interference. However
in some installations it may be necessary to take additional
steps to help reduce or eliminate noise interference. During
installation, try to route the DC battery leads, the antenna lead
or any accessory wires away from the engine compartment,
ignition or alternator wiring. If the noise continues, it may be
necessary to fit a suppression kit in which case we recommend
you consult an auto electrician for advice specific to
your installation.
Higher frequency electrical interference cause by electric motors
can be suppressed directly at the motor terminals.
Fitting the LCD controller microphone
Mounting the cradle
The mounting bracket can be oriented the arms extending
either forward or backwards to adjust the position of the front
panel with reference to the mounting point
Slide microphone
into the mounting clip