GME Electrophone TX3400 User manual

INSTRUCTION MANUAL
STANDARD COMMUNICATIONS
PTY. LTD.
TX3400
UHF TRANSCEIVER

2
CONTENTS
Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Scanning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Selective Calling . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Using the Quiet Mode . . . . . . . . . . . . . . . . . . . . . 12
Group Calls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Page Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
CTCSS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
CTCSS Tone Frequency Chart . . . . . . . . . . . . 17
Disabling Functions . . . . . . . . . . . . . . . . . . . . . . . 18
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Repeaters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Channel Frequency Chart. . . . . . . . . . . . . . . . . 22
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Your GME Electrophone TX3400 transceiver is
Australian designed and built and is the most
advanced UHF Citizen Band radio available.
The TX3400 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 TX3400's small size means it can be
mounted in almost any convenient location and
its strong diecast aluminium chassis makes it
the most robust transceiver of its kind. With
just two rotary controls and four touch keys,
the TX3400 is easy to operate.
FEATURES
•Microprocessor Controlled Frequency
Synthesiser: Allows user programmable
control of scanning, channel memories and
selected feature options.
•Permanent Memory: Retains all user
settings in non-volatile memory even when
the power has been removed.
•Programmable Scan Function: Scans up
to 40 user programmable channels with
both Group and Open scan functions
available.
•Remote or Local Installation Option: The
TX3400 can be mounted either remotely
using the separate control head, or locally
with the control head attached to the main
unit.
INTRODUCTION
The following items are included with your TX3400
If any items are missing or damaged, please contact your dealer or place of purchase.
• TX3400 Transceiver with Remote Head Unit
• Microphone
• Microphone Clip
• Instruction Manual
• Mounting Cradle for Main Unit
• Mounting Bracket for Remote Unit
• Screw Pack
• DC Lead

Microphone
Socket •Scan
•Selcall
Mem 1.
•Open Scan /
Group Scan
•Selcall Mem 2.
•Duplex
•Selcall
Mem 3.
•Squelch
•Silent
•Pager Mem.
•Channel Selector
•Priority Channel Liquid Crystal
Display •Volume ON/OFF
•Quiet Mode Selector
SQLOS/GS P321 PUSH
QUIET
PUSH
PRI
CALL TOFROM
SCAN
QM
BUSY
DUP
T/A SILENT
QUIET
Tx
•Individually Programmable DUPLEX
function: User selectable for only those
individual channels in your area that have
repeaters, leaving the others free for use as
extra simplex channels.
•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 four
or 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, the Quiet mode prevents
incoming signals from being heard on
selected channels unless preceded by your
Selcall code.
•Unique Page (Transpond) Mode: Allows
you to transfer an incoming Selcall to
another radio if your radio is unattended.
•CTCSS Ready: A built-in Continuous Tone
Coded Squelch System option provides
quiet channel operation (when approved by
the Australian Communications Authority).
•Feature Disabling Function: Allows
Scanning, Squelch, Duplex, Priority,
Channel selection and CTCSS (when active)
features to be enabled or disabled to make
the radio simpler to operate.
•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.
•Designed and Manufactured in Australia:
The TX3400 has been totally designed and
manufactured in Gladesville NSW to meet
the demanding needs of the Australian
community.
3
OPERATION

VOLUME
Rotate the volume control clockwise past the
"click" to turn the TX3400 on. Adjust the
volume control for a comfortable listening level.
If no sound is heard, temporarily unmute the
radio by briefly pressing the SQL key. You can
now adjust the volume by listening to the
receiver's background noise. When finished,
briefly press the SQL key again to re-mute the
radio.
BACK LIGHTING
The Liquid Crystal Display and function keys
are backlit for easy viewing at night or in low
light situations. The back lighting is on at all
times while the TX3400 is turned on.
SELECTING CHANNELS
Select the required channel by rotating the
channel selector knob. Rotate the knob
clockwise to select higher channels and
counter-clockwise to select lower channels.
The selected channel is displayed on the LCD.
SQUELCH
The squelch is used to eliminate any annoying
background noise when there are no signals
present. The TX3400 features a preset squelch
system. The squelch level has been set to
provide optimum performance.
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 any incoming signals
will override the Squelch and be heard in the
speaker.
To open the Squelch, briefly press the SQL key.
A low beep will be heard. 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.
Setting the Squelch Sensitivity.
The sensitivity of the squelch to incoming
signals can be set to suit your operating
environment. The TX3400 has three preset
squelch sensitivity settings which can be
selected using a front panel key sequence.
• SQL1: Maximum Sensitivity.
The squelch will open even on very weak
signals. This is the best setting for quiet
country or rural locations where there are
very few weak stations or little locally
generated interference.
• SQL2: Medium Sensitivity.
The squelch will open on most signals, but
will not be as sensitive to very weak signals
or local interference. Suitable for general or
suburban use.
• SQL3: Minimum Sensitivity.
The squelch will open on reasonably strong
signals and weak signals will not be heard.
Suitable for inner city applications or areas
of severe interference.
To pre-select the squelch sensitivity.
1. Turn the TX3400 OFF at the Volume control.
2. Hold the DUP and SQL keys while turning
the unit back on again.
3. Rotate the Channel switch to select SQL1,
SQL2 or SQL3.
4. Turn the unit OFF again to store the setting.
DUPLEX SWITCH
Duplex operation allows the TX3400 to transmit
on a different frequency to that which it
receives. This allows operation through any
repeater stations in your area. Repeaters
4

automatically re-transmit your signal over a
wider area, providing greatly increased range.
The Duplex function operates only on channels
1 - 8. When Duplex is selected on one of these
channels, the TX3400 receives on that channel
but actually transmits 30 channels higher.
E.g.
The TX3400 allows you to select duplex
operation on individual channels. This is
particularly useful in country areas where there
may only be one or two repeaters. Then
unused repeater channels can be used for
normal simplex or direct radio-to-radio
communications.
To select Duplex on individual channels:
1. Select the required channel 1 - 8.
2. Briefly 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. ‘DUP’ will
be visible on the display.
2. Briefly press the DUP key. ‘DUP’ will
disappear from the display accompanied by
a low beep.
PRIORITY CHANNEL
The Priority channel feature allows you to store
one of the 40 channels in the TX3400 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 Channel Knob. The
channel display will flash for a moment then
a high beep will be heard as the selected
channel is stored.
To recall a Priority channel:
Briefly press the Channel Knob. The TX3400
will immediately switch to the Priority channel
accompanied by a high beep.
The TX3400 features two scan groups - Open
Scan and Group Scan.
•Open Scan allows any of the fitted channels
to be scanned for activity in an ascending
sequence (i.e. from the lowest channel to
the highest). Channels are scanned at a rate
of 20 channels per second. 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.
•Group Scan also allows any of the fitted
channels to be scanned for activity in an
ascending sequence, but in addition, it also
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 have priority over any signals
received on the other channels.
Example showing Group Scan channels 1 to 8
with priority channel 20.
5
Channel Selected 1 2 3 4 5 6 7 8
Receive Channel 1 2 3 4 5 6 7 8
Transmit Channel 31 32 33 34 35 36 37 38
SCANNING
1 - 2 - 3 - 4 - . . . . . . . . . . - 39 - 40
1 - 2 - 3 - 4 - 20 - 5 - 6 - 7 - 8 - 20

Selecting a Scan Group.
The current scan group is shown on the display
as OS for Open Scan or GS for Group Scan.
To change the selected scan group:
• Briefly press the OS/GS key.
A beep will be heard and the display will
change to reflect the scan group you have
selected.
Programming Scan Channels.
Your TX3400 is supplied with all 40 UHF CB
channels programmed into the Open Scan
memory. Any channels not required can be
removed as necessary. 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. Check that the radio is not already
scanning. If it is, briefly press the SCAN key
to cancel the scan function.
2. Select the required scan group by pressing
the OS/GS key.
3. Select the required channel using the rotary
channel selector switch.
•If ‘M’ is displayed to the upper left of the
channel number, the selected channel is
presently in the scan memory. It can be
removed by holding the SCAN key in for a
few seconds until a low beep is heard. ‘M’
will then disappear indicating the channel is
no longer in memory.
•If ‘M’ is not visible to the upper left of the
channel number, then the selected channel
is not in the memory. To add it, hold the
SCAN key in for a few seconds until a high
beep is heard. ‘M’ will now appear to the
upper left of the channel number.
4. Repeat step 3 to add or remove other
channels in the scan memory.
To Start Scanning:
To scan in the selected 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.
NOTE: If there are less than 2 channels
programmed in the scan memory in Open Scan
or one channel in Group Scan when you press
the SCAN key, a long low beep will be heard
and the command will be ignored.
Scanning 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 CALL button on top of the
microphone. The radio will skip over that
channel and resume scanning from the next
channel in the sequence.
• To talk while paused on a busy channel,
simply press the Push-To-Talk (PTT) button
on the microphone. The SCAN mode will be
put on hold and the radio will stay on that
channel. You can now converse on that
channel in the usual way. When you have
finished your conversation, briefly press the
CALL button to resume scanning.
•If your radio is paused on a busy channel
and you wish to remain there, briefly press
the SCAN key. The radio will exit the Scan
mode and remain on the busy channel.
•If your radio is scanning and you need to
use your Priority channel (for an urgent call
or an emergency), briefly press the channel
knob. The Scan mode will be cancelled and
the radio will jump straight to the Priority
channel.
NOTE: Your TX3400 will not allow you to
transmit while it is scanning channels in the
Open Scan mode. If the PTT button is pressed
6

while scanning, the radio will give a low beep
and will ignore the command. Your radio will
only transmit in the Open Scan mode while it is
paused on a busy channel.
Ending the Open Scan.
To stop scanning, briefly press the SCAN key
again. A low beep will be heard and “SCAN”
will disappear from the display. As long as the
radio was not on a busy channel, it will return
to the last channel you selected, otherwise it
will stay on the busy channel.
Group Scan Mode.
With Group Scan selected, you can transmit
and receive normally on your priority (working)
channel, but between breaks in the
conversation, the radio will scan and listen to
several other channels. The receiver will
continue to 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
Push-To-Talk switch on the microphone at any
time, the radio will transmit on the priority
channel in the usual way.
Setting up your Group Scan.
To setup your radio for Group Scan:
1. Select the Group Scan mode by pressing
the OS/GS key so that ‘GS’ is displayed.
2. Program your Priority channel memory with
your preferred working channel.
(a) Select the required channel.
(b) Press and hold the Channel knob for a
couple of seconds. The channel display will
flash for a moment then a high beep will be
heard as the selected channel is stored.
3. Program the required ‘other’ channels into
your Group Scan memory.
(a) Select the required channel.
(b) If ‘M’ is displayed to the upper left of the
channel number, the selected channel is
presently in the scan memory. It can be
removed by holding the SCAN key in for a
few seconds until a low beep is heard. ‘M’
will then disappear indicating the channel is
no longer in memory.
(c) If ‘M’ is not visible to the upper left of the
channel number, then the selected channel
is not in the memory. To add it, hold the
SCAN key in for a few seconds until a high
beep is heard. ‘M’ will now appear to the
upper left of the channel number.
(d) Repeat steps (a) to (c) to add or remove
other channels in the scan memory.
To Start Scanning.
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.
NOTE: If there are no channels programmed in
the Group Scan memory when you press the
SCAN key, a low beep will be heard and the
command will be ignored.
Scanning in the Group Scan Mode.
When scanning, the Group Scan feature scans
all the channels programmed into the scan
memory, with the priority channel being
scanned after every fourth channel.
•If a signal is heard on a scan channel, the
receiver will "lock" onto it and remain there
for as long as the channel is busy, and for 5
seconds after the channel has cleared, 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
'locked' channel. If no signals are heard
after 5 seconds, the radio will resume
scanning.
•If a signal appears on the priority channel at
any time (even when locked on a scan
channel) the receiver will switch straight to
7

8
SELECTIVE CALLING
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 on the priority channel for 5
seconds, the radio will resume scanning the
other channels.
• To talk on the priority (working) channel
while scanning, simply press the Push-To-
Talk switch on the microphone. 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.
•If your radio pauses on a busy channel and
you don't wish to listen to that conversation,
briefly press the CALL button on top of 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 the Scan
mode and remain on the busy channel. Note
that the radio will no longer be monitoring
the Priority channel (unless it is the busy
channel). To resume scanning, press the
SCAN key again.
• To go directly to the Priority channel, briefly
press the Channel knob. The radio will exit
the Scan function.
Ending the Group Scan.
To cancel the Scan mode, briefly press the
SCAN key. A low beep will be heard and
‘SCAN’ will disappear from the display. If the
radio was on a busy channel it will remain on
that channel, otherwise it will return to the
priority channel.
GENERAL OVERVIEW
What is Selcall.
Your TX3400 has a Selective Calling (Selcall)
system which operates like your telephone.
Your radio has been programmed with its own
unique number. When this number is called,
your TX3400 will beep to alert you.
If you do not want to hear any other activity
while on the channel, you can push a QUIET
button. The radio will then remain quiet until
your number is called.
Your radio allows you to store up to four of your
most frequently called numbers in memory.
Each number can be labelled with a 5 letter
name for easy identification.
Selcall Identification Number (Ident).
Your TX3400 is factory programmed with its
own unique Selcall Identification Number
(Ident). This number identifies your radio from
others in your area. You will need to make your
Ident known to anyone who may need to call
you with Selcall. Whenever your TX3400 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 to the call.
The Selcall Ident for your radio is printed on the
label on the rear panel of the main unit. The
Ident is the last 5 digits of the radio’s serial
number.
The Selcall Ident is also displayed in the
bottom left of the LCD for a second each time
the radio is turned on.
NOTE: Although your radio’s Selcall Ident is
pre-programmed at the factory, you can
arrange to have your dealer change it if
required.

9
Naming your Selcall Idents.
The TX3400 allows you to name up to four of
your most often used Selcall Idents using a 5
character word. The name can then be stored
in memory with the Ident. This makes it easier
to identify who’s Ident you are recalling from
the memory. In addition, if an incoming Selcall
matches one of the Idents stored in the
memory, its name can be displayed to make it
easier for you to identify the caller.
The QUIET Mode (Q)
Your TX3400 can be set to listen on a busy
channel but not allow any sound to reach the
speaker UNLESS it receives its own Selcall
Ident. In this way, your radio can monitor a
busy channel without disturbing you, but still
let you know when you are being called.
•The QUIET mode overrides the normal
Squelch system to ensure that the radio
remains quiet even when the channel is
busy or the Squelch is ‘opened’ with the
Squelch key. When QUIET is set, you may
see ‘BUSY’ appear on the display and
signal strengths appear on the ‘S’ meter
indicating the channel is being used.
However, unless someone transmits your
Selcall Ident, nothing will be heard in the
speaker.
•The QUIET mode can be set to work on
specific channels i.e. some channels can be
set to remain Quiet while others can remain
Open to all incoming signals.
If a signal containing 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.
NOTE: Setting the QUIET mode is not
mandatory. You can still use Selcall on any
channel whether the QUIET mode is set or not.
SENDING SELCALLS
Use the following procedure to enter and send
Selcalls.
To enter a Selcall IDENT.
Briefly press the CALL button on top of the
microphone. ‘CALL TO’ will appear on the
display along with the last Selcall Ident you
sent.
You can now either send the Ident that is
presently displayed or enter a new Selcall
Ident. If you do nothing, the radio will
automatically exit the ‘CALL TO’ mode after 20
seconds and return to normal operation.
To enter a new Selcall Ident:
The righthand digit of the Selcall Ident will be
flashing. This flashing digit indicates the digit to
be changed
1. Rotate the Channel knob to select the
required number in the flashing digit
position.
2. Briefly press the Channel knob to select the
next digit to program. A high beep will be
heard and the next digit will flash.
3. Repeat steps 1 and 2 to program all 5 digits
as required.
Once the Ident has been entered you have 20
seconds to send it otherwise the ‘CALL TO’
mode will be cancelled and the Ident you
entered will be lost.
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.
If your Selcall transmission is successful, the
radio you called should respond with a ‘call
acknowledge’ signal - usually two quick beeps.
This will confirm to you that the radio you
called is now alerting its user to your signal.

10
STORING SELCALL IDENTS
Your TX3400 is fitted with four Selcall Ident
memories, allowing you to store up to four
frequently used Selcall Idents. The memories
are accessed using the four keys beneath the
display labelled 1, 2, 3and P.
NOTE: The Pkey is normally used to store the
PAGE Ident for when the radio is used in the
PAGE mode, but it can be also be used as a
standard Selcall Ident memory if the PAGE
mode is not in use. (The PAGE mode operation
is described later in this manual).
To Store a Selcall Ident in memory.
1. Press the CALL button to select the ‘CALL
TO’ mode.
2. Enter the required Selcall ident as described
previously.
3. Now press and hold (for about 2 seconds)
one of the four keys directly below the
display labelled 1, 2, 3or P. The Selcall
Ident will flash for a few seconds, then the
radio will beep as the Ident is stored.
To Recall a Selcall Ident from memory.
1. Briefly press the CALL button to select the
‘CALL TO’ mode.
2. Briefly press the appropriate memory key (1,
2, 3or P). The Selcall ident stored in that
memory will be displayed.
3. Press and hold the CALL button to send the
Ident.
NAMING YOUR SELCALL IDENTS
Your TX3400 allows you to enter a 5 character
name for each Selcall Ident you have stored in
memory. This makes it easier to remember
whose Selcall Ident you are recalling. In
addition, if an incoming Selcall matches one of
those in your radio’s memory, the name can be
displayed instead of the Selcall Ident, making it
easier to identify the caller.
Switching between Ident Mode and Name
Mode.
The TX3400 can be toggled between the
normal Ident mode and the Name mode as
follows:
1. Briefly press the CALL button to select the
‘CALL TO’ mode.
2. Press and hold the Volume knob until the
radio beeps. The TX3400 will toggle
between the Ident mode and the Name
mode.
3. Briefly press the CALL button again to
return to normal operation. The radio will
remain in the selected mode.
Entering and Storing a Selcall Name.
NOTE: Before adding a Name to a Selcall Ident,
you should first store the required Ident in
memory as described above. The steps
described below assume that your TX3400 is in
the normal Ident mode.
1. Briefly press the CALL button to select the
‘CALL TO’ mode.
2. Briefly press a memory key (1, 2, 3or P). If
the radio is in Ident mode, the Selcall Ident
stored in that memory will be recalled and
displayed.
3. Press and hold the Volume knob until a
beep is heard. The radio will switch to the
Name mode and the displayed Ident
number will be replaced with characters.
4. Using the same procedure as used for
entering Idents, rotate the Channel knob to
select the required letter in the flashing
character position, then press the knob to
move to the next character position.
5. When all characters have been entered,
press and hold the memory key associated
with that Ident to store the Name. The radio
will beep and the Name will be stored.
Repeat the procedure to add Names to any
other Selcall Idents stored in memory.

11
To exit the ‘CALL TO’ mode, briefly press the
CALL button. The radio will return to normal
operation.
The radio can now be left in the Name mode so
that an incoming Selcall matching one of those
in the radios memory will display the name
associated with that Selcall Ident instead of the
Ident itself. Any Selcalls not matching those in
the memory will display the normal Ident in the
usual way.
The way in which your TX3400 handles an
incoming Selcall may vary depending on how it
has been programmed. The following section
describes receiving Selcalls on the TX3400
when using the standard factory default
settings.
RECEIVING SELCALLS
When your TX3400 receives its own Selcall
number, it will beep to alert you to the call. In
addition, it will cancel the QUIET mode (if
selected) and display the Ident or Name of the
caller.
Displaying the Callers Ident or Name.
Whenever your TX3400 receives its own
Selcall Ident, the words ‘CALL FROM’ will
appear on your display above the callers
Selcall Ident or Name to inform you of the
identity of the person calling.
The Selcall Alarm.
When your TX3400 receives its Selcall Ident, an
alarm will sound in the speaker 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.
Cancelling the Selcall Alarm.
Pressing just about any key or knob on the
TX3400 will cancel the Selcall Alarm. However,
the following are the recommended methods.
•If you want to Cancel the Alarm and listen
on the channel:
Briefly press the Volume/Quiet knob. The
alarm will stop beeping and the channel will
remain open to any incoming signals.
•If you want to Cancel the Alarm and talk on
the channel:
Press the PTT switch on the microphone
and talk in the usual way. The alarm will be
cancelled and the channel will be open for
normal communication.
•If you want to Recall the Callers Ident and
return the call:
Briefly press the CALL button on the
microphone. The radio will enter the ‘CALL
TO’ mode and will insert the callers Ident or
Name ready for sending. Now simply press
and hold the CALL button for a few
seconds until the radio beeps. The Selcall
will be sent to the caller.
Call Acknowledge Signal.
When your TX3400 receives its own Selcall
Ident, it automatically responds by transmitting
an ‘acknowledge’ signal back to the caller.
This informs the caller that their Selcall
transmission has been successful and that
your radio is alerting you to their call. The
‘acknowledge’ signal is heard at the callers end
as two quick beeps.

12
USING THE QUIET MODE
The QUIET mode prevents any incoming
transmissions from being heard in your
TX3400’s speaker until your Selcall Ident is
received. This allows you to monitor a busy
channel for calls without being disturbed by
unwanted signals.
When your Selcall Ident is received, the QUIET
mode is cancelled and all incoming signals will
be heard in the speaker.
The QUIET mode is setup by first tagging the
channels that you want to stay Quiet, then
activating the QUIET mode. Once QUIET is
activated, the channels you have tagged will
remain Quiet to all incoming signals. Channels
not tagged will operate normally.
To Tag individual channels for QUIET
operation.
1. Select the required channel by rotating the
Channel knob.
2. Press and hold the Volume/Quiet knob until
a high beep is heard. ‘Q’ will appear to the
upper left of the channel number indicating
this channel is now tagged for Quiet
operation.
Repeat steps 1 and 2 to tag all required
channels.
To Activate the QUIET Mode.
1. Select any channel that has been tagged for
Quiet operation. ‘Q’ will be displayed.
2. Briefly press the Volume/Quiet knob.
‘QUIET’ will appear on the right of the
display.
Now all channels tagged for Quiet operation
will be operating in the Quiet Mode.
(You can test this by opening the squelch using
the squelch key and selecting various channels
with the Channel knob. The radio’s background
noise will be heard on normal open channels
but will remain quiet on those channels that are
set for Quiet operation.)
NOTE: You cannot activate the Quiet mode
unless you have selected a ‘tagged’ channel
with ‘Q’ displayed.
To De-activate the QUIET Mode.
1. Select any channel that has been tagged for
Quiet operation. ‘Q’ and ‘QUIET’ will be
displayed.
2. Now briefly press the Volume/Quiet knob.
‘QUIET’ will disappear on the right of the
display and all channels tagged for Quiet
operation will now operate normally again.
To Remove the QUIET Tagging.
1. Select a channel that has been tagged for
Quiet operation. ‘Q’ will be displayed to the
upper left of the channel number.
2. Now press and hold the Volume/Quiet
knob until a low beep is heard. ‘Q’ will
disappear indicating this channel is no
longer tagged for Quiet operation.
Receiving Signals in the QUIET Mode.
•If a normal signal is received on a QUIET
channel, the channel will appear busy 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 -
the QUIET mode will be cancelled and the
alarm will beep to alert you to the call. In
addition, the callers Ident or Name will be
displayed. All channels will now be open for
normal transmission and reception.

13
GROUP CALLS
SCANNING IN THE QUIET MODE
The TX3400 will allow you to scan while the
QUIET mode is active. You can then monitor a
group of Quiet channels or a combination of
Quiet and Open channels.
To Scan in the QUIET Mode:
1. Press the OS/GS key to select the required
Scan group.
2. Select the channels you wish to remain
Quiet and tag each one with ‘Q’.
3. With a tagged channel selected, briefly
press the Volume/Quiet knob to activate
the QUIET Mode.
4. Now press the SCAN key. The radio will
begin scanning and ‘SCAN’ will be
displayed.
•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 GS 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 will
be displayed. The channel will now be open
for normal transmission and reception.
NOTE: To ensure reliable Selcall detection
when scanning, it is recommended that you
restrict the number of channels in the Scan
group.
In Open Scan Mode: 10 Channels
In Group Scan Mode: 8 Channel plus the
Priority Channel
The TX3400’s Selcall system includes a Group
Call function which allows you to call up to 10
radios simultaneously. This could be useful in
an emergency situation where you may need to
transmit a message to a number of radios in
your group.
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 an ‘A’
when displayed in the radio. When this ‘group
code’ is received, it substitutes for any other
number 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 alarms 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.
i.e. 12030, 12031, 12032, 10233 . . --> , 12039
e.g.
• Transmitting the Selcall Ident 12031 will only
activate the alarm in the radio with the
Selcall Ident of 12031.
• Transmitting 1203A will activate the alarms
in all radios with Idents 12030 through
12039 (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 dealer to re-program your
radios.

14
PAGE MODE
Programming and Sending Group Calls.
Entering a Group call Ident is the same as
entering a normal Selcall Ident.
1. Briefly press the CALL button on top of the
microphone. ‘CALL TO’ will appear on the
display along with the last Selcall Ident you
sent.
The righthand digit of the Selcall Ident will
be flashing. This flashing digit indicates the
digit to be programmed.
2. Rotate the Channel knob to select ‘A’ in the
righthand flashing digit position. This is
special code that will create the Group Call.
3. Briefly press the Channel knob to select the
next digit to program. A high beep will be
heard and the next digit will flash.
4. Rotate the Channel knob to select the
required number in the next flashing digit
position.
5. Repeat steps 3 and 4 to program all 5 digits
as required. When completed, the first 4
digits of the Ident you have entered will
match all the radios in the group. The last
digit will be set to ‘A’.
Once the Ident has been entered you have 20
seconds to send it otherwise the ‘CALL TO’
mode will be cancelled and the Ident you
entered will be lost.
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 was as a standard Selcall Ident.
Simply follow the instructions for storing Selcall
Idents in memory as described earlier in this
manual.
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 Name appears
on the display in the usual way.
The PAGE or transpond feature allows you to
leave your radio unattended yet still be
informed of any incoming Selcalls. If your
Selcall Ident is received while your TX3400 is in
the PAGE mode, it will automatically call
another UHF radio to alert you to the call.
To receive the Paging call, the other UHF radio
must be fitted with a CCIR compatible Selcall
(such as a TX3400, TX4200, TX4000, TX6000
or TX475S.
NOTE: To allow your TX3400 to operate in the
PAGE mode when your vehicle is unattended,
your radio must be wired so that it has a
continuous 13.8 volt power source even when
the vehicles ignition is switched off (see
installation instructions).
Selecting the Paging Channel.
Your TX3400’s Paging channel is factory set to
UHF CB channel 23. If channel 23 is not
suitable for use in your area, you can arrange
for your dealer to reprogram it to another of the
40 UHF CB channels.

15
Setting the PAGEing Ident.
The PAGE Ident is the Ident of the receiver you
will use to receive the paging call. It is
programmed in the same way as Selcall Idents
and is stored in a special Page memory.
1. Press the CALL button to select the ‘CALL
TO’ mode. An Ident will be displayed.
2. Rotate the Channel switch to select the
required number in the flashing digit
position then briefly press the Channel
switch to step to the next digit. Repeat until
all 5 digits have been set.
3. Now press and hold the ‘P’ (Page memory)
key below the display until the radio beeps.
The ident will be stored in the Paging
memory.
Naming the Page Ident.
A label or name can be applied to the Page
Ident to make it easier to identify when the
radio is in the Name mode.
To add an Name:
1. Briefly press the CALL button. ‘CALL TO’
will be displayed.
2. Briefly press the ‘P’ key to display the Page
Ident.
3. Press and hold the Volume knob until the
radio beeps. The radio will change to Name
mode.
4. Rotate the Channel switch to change the
character in the flashing character position,
then press the Channel switch to select the
next character.
5. When all 5 characters have been selected,
press and hold the ‘P’ memory key until the
radio beeps. The Name will be stored in the
Page Ident memory.
Viewing the Page Ident Memory.
To view the Ident or Name stored in the page
memory:
1. Briefly press the CALL button to select the
‘CALL TO’ mode.
2. Briefly press the ‘P’ memory key. The page
Ident will be displayed. If the radio is in
Name mode, the Name associated with the
page Ident will be displayed instead of the
Ident.
Activating the Page Mode.
Select the Page mode by holding down the
CALL button then pressing the Volume knob.
‘PAGE’ will be displayed and the display
lighting will extinguish after 10 seconds to
conserve power in case the radio is to be left in
Page mode for an extended period. This also
makes the radio less visible if it is left in an
unattended vehicle at night.
Deactivating the Page Mode.
To de-activate the page mode, briefly press the
Volume knob.
Receiving your Selcall in Page Mode.
If your TX3400 receives its own Selcall Ident
while in the PAGE mode, it will temporarily
switch to the paging channel, check that the
channel is not in use, then transmit the paging
Ident to the other receiver. It will then return to
the channel on which the original call was
received, activate its own Selcall alarm and
display the callers Ident.
Meanwhile the other receiver will be beeping to
tell you that someone has called you. You can
then return to your TX3400, identify the callers
Ident and return the call.
The page mode can be used either while
monitoring a single channel or while scanning
in open scan or group scan mode.
Monitoring a Single channel in the PAGE
Mode.
To monitor a single channel in the Page mode,
simply select the channel you wish to monitor,
then select the Page mode by holding the
CALL button down and pressing the Volume
knob .

16
With the Page mode selected, the radio will
operate normally and you can transmit and
receive on the selected channel.
•If the selected channel has been tagged for
Quiet operation, the QUIET mode will be
automatically selected and QUIET will be
displayed. In this case, you will not be able
to transmit.
•If your Selcall Ident is received, your TX3400
will send an acknowledge beep back to the
caller then change to the Paging channel
and transmit the Page Ident. It will finally
return to the selected channel, sound the
alarm and display the Ident or Name of the
caller.
Scanning in the Page Mode.
To Scan in the Page mode, simply select the
required scan group, program the required
channels, then briefly press the SCAN key. The
radio will begin scanning.
Now select the Page mode by holding the
CALL button down and pressing the Volume
knob.
Scanning with QUIET Mode.
The radio will scan the selected channels. If
any channels have been tagged for Quiet
operation, the QUIET mode will be
automatically selected and ‘QUIET’ will be
displayed. You will not be able to transmit.
Scanning in Open Scan Mode.
If the radio is scanning in the Open Scan mode,
you will not be able to transmit unless the scan
has stopped on a busy channel.
Scanning in Group Scan Mode.
If the radio is scanning in the Group scan
mode, you can transmit on the Priority channel
at any time.
To Return a Call in the PAGE Mode.
If you return to your radio and it is beeping,
briefly press the Volume/Quiet button. The
radio will exit the PAGE mode and ‘CALL
FROM’ will be displayed along with the Ident or
Name of the caller.
Briefly press the CALL button. ‘CALL TO’ will
be displayed along with the Ident or Name of
the caller. Now press and hold the CALL button
for a few seconds until the radio beeps. The
callers Selcall Ident will be sent. If the call is
successful, you will hear two quick
acknowledge beeps in your radio’s speaker as
the caller’s radio responds.
CTCSS (Continuous Tone Coded Squelch
System) is a quieting system that allows a
group of radios to talk to each other without
hearing other users on the channel. The system
applies a continuous low level tone to your
transmission, and a matching tone decoder to
your receiver's squelch. When CTCSS is
enabled the channel remains quiet until
someone transmits using the same tone. When
the transmission ends, the channel becomes
quiet again. By using different tones, several
groups of people can share the same channel
without disturbing each other.
Your TX3400 is CTCSS ready. This means that
CTCSS is designed into your TX3400, but
disabled at the factory. The Australian
Communications Authority does not yet permit
the use of CTCSS on CB frequencies. However,
when approval for CTCSS is granted, you may
contact your dealer to arrange for this feature
to be enabled.
The following description assumes CTCSS has
been enabled by your dealer.
The TX3400 allows CTCSS to be enabled or
disabled on individual channels. In addition, the
CTCSS

CTCSS tone frequency used is user
programmable. Note that the CTCSS tone you
select will be used for all CTCSS enabled
channels.
To select the required CTCSS tones on your
radio, use the following procedure:
1. Switch the TX3400 OFF at the volume
control.
2. Press and hold the SQL and SCAN keys
while turning the radio on again. ‘SILENT’
will be flashing and ‘BUSY’ will be visible.
The channel number will now correspond to
one of 50 different CTCSS tones as shown
in the table below. The factory default is 00.
3. To select the desired receive tone, rotate
the channel switch until the required tone
number is displayed.
4. Press and hold the SQL key. The display
will flash and a high beep will be heard as
the receive tone is stored.
5. Now briefly press the SQL key to select the
transmit tone. ‘SILENT’ will be flashing and
‘TX’ will be visible.
6. Select the desired transmit tone using the
channel switch. Press and hold the SQL
key to store the tone.
7. Now switch the radio OFF then ON again to
return to normal operation.
NOTE: To disable the sending or receiving of
CTCSS tones, set either tone to 00. If both
transmit and receive tones are set to 00, the
CTCSS function is disabled and can not be
selected.
To enable the CTCSS function on a channel:
1. Select the required channel.
2. Press and hold the SQL key until a high
beep is heard. ‘SILENT’ will be displayed.
You may activate CTCSS on as many channels
as you wish except channels 1 - 8 (CTCSS is
automatically disabled on repeater channels
and the emergency channel 5).
To de-activate CTCSS, repeat the steps above.
A low beep will be heard and “SILENT” will
disappear.
17
00
01
02
03
04
05
06
07
08
09
10
11
12
0
67.0
69.4
71.9
74.4
77.0
79.7
82.5
85.4
88.5
91.5
94.8
97.4
13
14
15
16
17
18
19
20
21
22
23
24
25
100.0
103.5
107.2
110.9
114.8
118.8
123.0
127.3
131.8
136.5
141.3
146.2
151.4
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
196.6
199.5
203.5
206.5
210.7
218.1
225.7
229.1
233.6
241.8
250.3
254.1
156.7
159.8
162.2
165.5
167.9
171.3
173.8
177.3
179.9
183.5
186.2
189.9
192.8
Tone
No. Frequency Hz Tone No. Frequency Hz
Tone
No. Frequency Hz Tone No. Frequency Hz
CTCSS TONE FREQUENCY CHART

The TX3400 has a number of features that can
be disabled individually by the user to allow for
much simpler operation. These include the
Priority, Scan, Duplex and Squelch/CTCSS
functions that are normally accessed via keys
on the front of the radio.
To disable one of the keys:
1. Turn the radio OFF using the volume
control.
2. Press and hold the key you wish to disable
while turning the radio back on.
A low beep will be heard and the selected key
will no longer function.
To re-enable the key, repeat the steps above.
When the radio is turned on again, a high beep
will be heard and the key will function normally
again.
For example, to disable the SCAN function:
1. Turn the radio OFF using the volume
control.
2. Press and hold the SCAN key while turning
the radio back on. A low beep will be heard
and the SCAN function will no longer be
available.
Repeat the procedure to re-enable the SCAN
function.
The TX3400 main unit is supplied with a slim,
slide-on 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, under the seat, in the boot, etc)
using the mounting slots provided in the base.
The main unit contains a built-in speaker, and
can be installed in a convenient location in the
vehicle’s cabin as the radio’s loud speaker.
Alternatively it can be installed “out of the way”
and an extension speaker used instead.
The remote head comes complete with a slim
mounting bracket and gimbal knobs. Its small
size and light weight allows it to be mounted in
almost any convenient position accessible to
the driver. If necessary, a 3 meter extension
cable (LE001) is available to extend the
distance between the remote head and the
main unit. For reliable operation, the total cable
length should not exceed 10 meters.
NOTE: If your installation does not require the
use of a remotely mounted control head, you
can convert your TX3400 to a compact
underdash radio by fitting the remote head
front panel directly to the main unit as
described later.
When installing the radio, avoid mounting it
close to heaters or air conditioners. Screw the
mounting cradle and the remote head bracket
to firm surfaces. Slide the TX3400 main unit
into the cradle from the front until it clicks into
place. Position the remote head in its mounting
bracket, adjust it for the correct viewing angle
and tighten the gimbal knobs securely. Finally,
plug the remote head into the front panel of the
TX3400 and the power and antenna leads to
the sockets provided on the rear of the radio.
Fitting Remote Head Bracket.
18
DISABLING FUNCTIONS
INSTALLATION

Fitting the Microphone.
The microphone uses a miniature 6 pin
telephone style plug and socket. To fit the
microphone:
1. Position the microphone plug so the plastic
tab faces downwards. Press the plug into
the socket until it "clicks".
2. Gently press the rubber strain relief into the
hole surrounding the socket so that the slot
around the strain relief fits neatly inside the
lip of the hole.
Removing the microphone.
1. Squeeze the rubber strain relief near the
front panel to disengage the slot, and slide
the strain relief back along the microphone
cord.
2. Squeeze the plastic tab on the microphone
plug towards the plug to unlock it while
gently pulling the plug outwards. If the plug
does not come out easily, the tab has not
released correctly and should be squeezed
again.
Converting the TX3400 into an Underdash
radio.
If your installation does not require the use of a
remotely mounted control head, you can
convert your TX3400 to a compact underdash
radio by fitting the remote head front panel
directly to the main unit as follows.
Remote Head Unit Disassembly.
1. Remove the two black screws from the
metal cable-clamp plate at the rear of the
remote unit.
2. Remove the 4 screws from the remote unit’s
rear case and remove the case.
3. Slide the rear case down the connecting
cable and carefully unplug the cable from
the PCB.
Main Unit Disassembly.
1. Remove the top and bottom covers from
the main unit.
19
Slide radio
from cradle
Plastic tab
Gently
spread
tabs
Gently
spread
tabs
Mounting the Cradle.
Fitting the Radio.
Slide radio fully into
cradle until it clicks
into place.
Removing the Radio.

2. Pull the dummy front panel away from the
chassis and carefully unplug the connecting
cable.
Reassembly.
1. Plug the connecting cable from the main
unit into the remote head front panel.
2. The remote front panel can be oriented so
that the speaker in the main unit is facing
either up or down. Position the front panel
as required and slide it onto the main
chassis. If the front panel is oriented so the
speaker is facing UP, ensure the connecting
cable is not crushed between the front
panel PCB and the chassis. Align the holes
in the top and bottom of the plastic front
panel with the case screw holes in the
chassis.
3. Refit the top and bottom covers and install
the cover screws.
Console Mounting the TX3400
For console mounting, a flush mounting DIN
Adaptor MBD001 is available as an optional
accessory. The adaptor includes mounting
brackets and a specially designed front panel
escutcheon to suit most vehicle installations.
The console mount is particularly suitable for
dashboard mounting TX3400’s that have been
converted from remote units to under-dash
units (as described above). Installation
instructions are provided with the bracket. See
your nearest GME dealer for details.
Din Adaptor MBD001
DC POWER CONNECTION
The TX3400 is designed for 13.8 Volt DC,
negative earth installations only (i.e. where the
negative terminal of the battery is connected to
the chassis or frame of the vehicle).
There are two recommended methods of
installation.
Radio remains on when the ignition switch
is off:
Connect the radio's negative (black) lead to the
vehicle's chassis, or if preferred, directly to the
battery's negative terminal.
The radio's positive (red) lead should be
connected directly to the battery's positive
terminal. Alternatively, the positive lead could
be connected into the fuse box at a point that
has +13.8 Volts continuously available
(preferably the battery side of the ignition
switch).
Radio turns off with the ignition switch:
Connect the radio's negative (black) lead to the
vehicle's chassis, or if preferred, directly to the
battery's negative terminal.
The radio's positive (red) lead should connect
to an accessory point in the vehicle's fuse box.
This point should supply +13.8 Volts only when
the ignition switch is turned ON or in the
ACCESSORY position.
HIGH VOLTAGE WARNING
The TX3400 has a built-in, high voltage
detection system to warn you if an overvoltage
situation occurs.
If the power supply voltage exceeds 18 Volts
20
Connect
Plug
Align Holes