GME TX3345 User Manual
5 watt super compact UHF CB remote LCD mic
INSTRUCTION MANUAL
CONTENTS
ACCESSORIES SUPPLIED .................................................3
IMPORTANT INFORMATION ............................................3
EMERGENCY CHANNELS................................................3
TELEMETRY CHANNELS ..................................................3
FEATURES ......................................................................4
GENERAL OPERATION ....................................................5
MC524B Controller Microphone ..............................5
Display....................................................................5
Function Keys ..........................................................5
Volume Key .............................................................5
Transmitting ............................................................6
Squelch ...................................................................6
Squelch Sensitivity ...................................................6
Menu .....................................................................7
Backlighting ............................................................7
Key Beeps ...............................................................7
Signal Meter/Battery Meter .....................................8
Priority Channel ......................................................8
Duplex Operation ....................................................8
Dynamic Volume Control (DVC) ...............................9
CTCSS & DCS .................................................................9
Choosing the CTCSS or DCS Tone ............................9
To select a CTCSS or DCS Tone ..............................10
Enabling CTSS/DCS on a Channel ..........................10
Disabling CTCSS/DCS on a Channel .......................10
MONITORING THE CHANNEL ........................................10
SCANNING ..................................................................11
Scan Groups .........................................................11
Selecting a Scan Group .........................................11
Programming Scan Channels ................................11
OPEN SCAN MODE ....................................................12
GROUP SCAN MODE ..................................................12
Auto Skip .............................................................13
Quick Channel Select ...........................................13
Using two Group Scan or two Open Scan Modes ..13
SELECTIVE CALLING ....................................................13
SelCall Indentification Number (IDENT) .................14
SelCall Ident Labels ..............................................14
The Quiet Mode ...................................................14
USING SELCALL ..........................................................14
Entering a SelCall Ident ........................................14
Call Acknowledge ................................................15
SelCall Memories .................................................15
Labelling your SelCall Idents .................................15
Receiving SelCalls ................................................16
Quiet Mode .........................................................16
Scanning in the Quiet Mode .................................17
GROUP CALLING.........................................................18
INSTALLATION ............................................................19
Antenna Installation .............................................19
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
PAG E 2 INSTRUCTION MANUAL TX3345
ACCESSORIES SUPPLIED
• Main Radio Unit
• Mounting Cradle
• Instruction Manual
• MC524B LCD
Microphone
• Microphone Clip
• DC Lead
• Screw Pack
If any items are missing or
damaged, please contact
your
retailer or place of
purchase
.
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.
TX3345 INSTRUCTION MANUAL PAG E 3
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.
There can be interference from a nearby transmitting radio if
it is using a channel adjacent to the channel you are listening
to. Simply try going up or down a few channels from the
currently selected channel. The above situations are not a
fault of the radio but a symptom of operating wideband and
narrowband radios in the same bandwidth. This possible
interference will decrease over time as the population of
wideband radios ages and decreases.
Further information and updates are available from the
Australian Communications and Media Authority (ACMA) at:
www.acma.gov.au and the Ministry of Economic Development
(MED), Radio Spectrum Management at: www.rsm.govt.nz
EMERGENCY CHANNELS
The ACMA has allocated channels 5/35 for emergency use
only. Channel 5 is the primary Simplex Emergency Channel.
Where a Channel 5 repeater is available, you should select
Duplex on CH 5.
NOTE: Channel 35 is the input channel for the Channel 5
repeater therefore Channel 35 should also not be used for
anything other than emergency transmissions.
TE LEMETRY 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
TX3345 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
TRANSMIT (TX)
Individually Programmable DUPLEX function: User selectable for only those individual channels in your area that have
repeaters, leaving the others free for use as extra simplex channels.
SIGNAL PROCESSING
Digital Signal Processing: Measures, filters and compresses
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.
Dynamic Volume Control (DVC): Automatically compensates for variations in received audio level resulting in a constant
audio output level to the speaker
SCANNING AND MEMORY FUNCTIONS
Microprocessor Controlled Frequency Synthesiser: Allows user programmable control of scanning, channel memories
and selected feature options
Programmable Scan Function: Scans the programmable UHF CB channels with both Group and Open scan functions
available.
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.
PRIVACY FUNCTIONS
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 System and Digital Coded Squelch option provides quiet channel
operation.
PHYSICAL PROPERTIES
Overvoltage Protection: Special overvoltage detection circuitry protects the radio and warns of excessive voltage
conditions by flashing the display.
USER CONTROLS AND INTERFACE
Controller Microphone: Complete control of the radio from the microphone simplifies installation.
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.
.
.
standard analogue audio signals and converts them into
PAG E 4 INSTRUCTION MANUAL TX3345
GENERAL OPERATION
+
+
MC524B MICROPHONE/CONTROLLER
Push-To-Talk (PTT)
Menu/
F Key
Power Key/
Monitor
Microphone
Channel Up
Channel Down
DISPLAY
Scan
Quiet Tag
Skip/Call
LCD Display
SCAN/
OS/GS
Quiet/
Duplex
Squelch/
ALPHA
Squelch level/
Priority channel
Volume Up
Volume Down
Channel Display
FUNCTION KEYS
There are several keys beneath the microphone controller’s
display that have dual functions. Their primary functions are
printed in black and their secondary functions are printed
in red.
To access the primary (black) functions
Press the key with the required function labelled in black.
e.g. To control the Squelch, briefly press the
SQL
ALPHA
key.
To access the secondary (red) functions
Press the Function key
MENU
followed immediately by the
F
key with the required function labelled in red.
NOTE: If the secondary key is not pressed within 10
seconds the
VOLUME KEY
Press the + key to increase the volume and the
MENU
key selection will time-out.
F
–
+
–
key to decrease the volume.
NOTE: At minimum volume setting there is still sufficient
volume to be heard in a quiet cabin environment.
SelCall RX
SelCall TX
Transmit
Busy
Repeater (Duplex)
SelCall/Alpha Display/Signal Meter/Battery Quiet CTCSS/DCS
TX3345 INSTRUCTION MANUAL PAG E 5
Selecting Channels
Press the or keys to step upwards or downwards
one or more channels. Press and hold to advance through
the channels at a faster rate.
TRANSMITTING
Prior to transmitting, always check the channel is not being
used. This can be done by either listening or by checking the
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
.
SQUELCH
The Squelch is used to eliminate the background noise
when there are no signals present. The TX3345 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 by pressing the
SQL
ALPHA
key. When the Squelch is open, the receiver’s background
noise can be heard and
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
ALPHA
there are no signals present you will hear the receiver’s
background noise.
To close the Squelch
SQL
Briefly press the
ALPHA
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. 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 TX3345 has nine (9) preset Squelch sensitivity settings
labelled SQL-1 to SQL-9. The minimum Squelch setting
(SQL-1) is the most sensitive and will allow the Squelch to
open on very 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 adjust the Squelch sensitivity
1. Briefly press the
LVL
key. ‘SQL-X’ will be displayed
PRI
where X is a value from 1 to 9.
2. Press the
or keys to change the Squelch
value. The Squelch adjustment is live allowing you to
adjust the Squelch to suit your current environment.
3. When your adjustment is complete, briefly press the
LVL
key to return to normal operation.
PRI
NOTE: The Squelch level can also be adjusted within the
Menu.
PAG E 6 INSTRUCTION MANUAL TX3345
MENU
The Menu provides a convenient way to customise your
radios settings. The following Menu options are available
MENU
ITEM
FUNCTION AVAILABLE
SETTINGS
SQL Adjust Squelch Level SQL--1 TO SQL--9
CTCSS Set CTCSS or DCS Code CTCOF
CTC01 -> CTC50
DC001 -> DC104
LIGHT Adjust Display Brightness See Display
COLOR Adjust Display Colour See Display
WHITE Adjust Colour Saturation See Display
S-METER/
BATT
BEEP Adjust Key Beep-Tone
DVC Activate/ Deactivate the
Display S-Meter or Battery
Voltage on the LCD
Volume
S-MET / BATT
VOL--0 ->
VOL--9
DVCOF / DVCON
Dynamic Volume Control
To use the Menu
Press and hold the
MENU
key until the radio beeps. ‘SQL’
F
will be displayed indicating the first Menu item (Squelch
setting mode) is selected.
Briefly press the
Press the
MENU
key to cycle through the Menu items.
F
or keys to adjust the selected Menu
item.
When finished, press and hold the
MENU
key to exit the
F
Menu or wait until the Menu times out.
To adjust the Squelch sensitivity from the Menu
1. Press and hold the
MENU
key for several seconds. The
F
radio will enter Menu mode and ‘SQL’ will be displayed.
2. Press the
3. When your adjustment is complete, briefly press the
MENU
F
or keys to adjust the Squelch value.
key to return to normal operation.
BACKLIGHTING
The Liquid Crystal Display and keys are backlit for easy
.
viewing at night. The backlight remains on while the radio
is switched on. The backlighting brightness, colour and
saturation are all fully adjustable for personal preference.
To adjust the Backlighting:
1. Press and hold the
MENU
key for several seconds. The
F
radio will enter Menu mode and ‘SQL’ will be displayed.
2. Press the
3. Press the
MENU
key repeatedly until ‘LIGHT’ is displayed.
F
or keys to adjust the backlight
brightness.
4. Press the
5. Press the
MENU
key briefly. ‘COLOR’ is displayed.
F
or keys to adjust the backlight
colour. The full spectrum of colours is available.
6. Press the
7. Press the
MENU
key briefly. ‘WHITE’ is displayed.
F
or keys to adjust the whiteness or
colour saturation of the selected backlight colour from
full colour to white (no colour).
8. To exit, press and hold the
MENU
key or wait for the
F
Menu to time out.
TIP: For the deepest colour range, reduce the WHITE
setting.
KEY BEEPS
The key beeps act as confirmation of your key presses.
You can adjust the volume level of the beeps as follows.
1. Press and hold the
MENU
key for several seconds. The
F
radio will enter Menu mode.
2. Press the
3. Press the
MENU
key repeatedly until ‘BEEP’ is displayed.
F
or keys to adjust the beep volume
from 0 (silent) to 9 (loud).
4. To exit, press and hold the
MENU
key or wait for the
F
Menu to time out.
TX3345 INSTRUCTION MANUAL PAG E 7
SIGNAL METER/BATTERY METER
The TX3345 includes a digital signal strength meter that
shows the relative strength of incoming signals on the
display. The meter displays signal strengths in values
from 0 (very weak) to 9 (very strong). Signals that exceed
strength 9 are shown as 9+
The TX3345 can also be set to display a battery meter
instead of the signal meter. The battery meter displays the
voltage of the connected power source with a resolution of
0.1 V. The Signal Meter is selected by default.
To switch between Signal Meter and Battery Meter:
MENU
1. Press and hold the
key for several seconds. The
F
radio will enter Menu mode.
2. Press the
MENU
key repeatedly until ‘S-MET’ (S Meter) or
F
‘BATT’ (Battery) is displayed.
3. Press the
or keys to select the required
option.
4. To exit, press and hold the
MENU
key or wait for the
F
Menu to time out.
PRIORITY CHANNEL
The Priority Channel feature allows you to store one
channel 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. Briefly press the
LVL
key. The selected channel will flash followed by
PRI
MENU
key then press and hold the
F
a high beep as the channel is stored.
To recall a Priority Channel
Briefly press the
MENU
key then briefly press the
F
LVL
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 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.
Simplex/Duplex Range Comparison
Simplex
Repeater
operation
Channel 1
Channel 31
Channel 1
Repeater
Station
Channel 31
Vehicle
The TX3345 allows you to select Duplex operation individually on each channel.
To select Duplex:
1. Select the required channel 1-8 or 41-48.
2. Briefly press the
MENU
F
key then press the
QUIET
DUP
key.
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. will be
visible on the display.
2. Briefly press the
MENU
key then press the
F
QUIET
DUP
key.
will disappear from the display accompanied by
a low beep.
Vehicle
PAG E 8 INSTRUCTION MANUAL TX3345
Channel Selected Receive Channel Transmit Channel
1 1 31
2 2 32
3 3 33
4 4 34
5* 5* 35*
6 6 36
7 7 37
8 8 38
41 41 71
42 42 72
43 43 73
44 44 74
45 45 75
46 46 76
47 47 77
48 48 78
*Emergency Channel only
DYNAMIC VOLUME CONTROL (DVC)
The modulation level of signals heard on the UHF CB band
often vary considerably resulting in noticeable differences in
received audio volume between stations. In the past, users
have compensated for this by adjusting the volume control
for each incoming signal. However with the introduction
of 80 channel narrowband transmissions, the diversity
in received audio volume has increased even further.
The TX3345’s Dynamic Volume Control is designed to
automatically compensate for these variations in received
audio level to provide a constant audio output level to the
speaker.
To select the Dynamic Volume Control:
1. Press and hold the
2. Press the
3. Press the
MENU
key to enter the Menu.
F
MENU
key repeatedly until DVCxx is displayed.
F
or keys to select DVCOF (Dynamic
Volume Control Off) or DVCON (Dynamic Volume
Control On).
4. When finished, press and hold the
MENU
key or wait for
F
the Menu to time out.
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. There are three optional tone
sets available comprising 38, 50 or 104 codes.
CTCSS and DCS systems apply a continuous low-level
low frequency tone to your transmission with a matching
decoder at the receiver to control your radio’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 TX3345 allows CTCSS or DCS to be enabled or disabled
on selected channels and the CTCSS/DCS tone you select
will be used for all CTCSS/DCS enabled channels in your
radio.
CHOOSING THE 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 TX3345 supports CTCSS 50 and CTCSS 38 tone
sets as well as 104 DCS tones. If the users you talk to don’t
currently use CTCSS or DCS you can make your own choice.
TX3345 INSTRUCTION MANUAL PAG E 9
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