GME TX3100VP User manual

Super compact 5 watt UHF CB radio
5 YEAR WARRANTY
INSTRUCTION MANUAL

PAGE 2 INSTRUCTION MANUAL TX3100
INTRODUCTION .........................................................................3
IMPORTANT INFORMATION........................................................3
TELEMETRY CHANNELS..............................................................4
FEATURES..................................................................................5
GENERAL OPERATION................................................................6
Unique Flip Feature.............................................................7
Power ................................................................................7
Volume ..............................................................................7
Selecting Channels .............................................................7
Transmitting .......................................................................7
Squelch Control..................................................................8
Squelch Sensitivity ..............................................................8
Backlight............................................................................9
Duplex Operation ...............................................................9
Dynamic Volume Control.....................................................9
Adjusting the Beep Tone Level ..........................................11
CTCSS & DCS...........................................................................11
Selecting the CTCSS or DCS Tone ......................................12
Enabling CTSS/DCS on a Channel......................................13
Disabling CTCSS/DCS on a Channel ..................................13
Monitoring the Channel....................................................13
SCANNING ..............................................................................14
Programming Scan Channels ............................................14
Using Scan...............................................................................14
Skipping Over Busy Channels While Scanning ...........................15
Transmitting While Scanning.....................................................15
INSTALLATION .........................................................................15
Antenna Installation .........................................................16
Noise Suppression ............................................................16
DC Power Connection.......................................................19
High Voltage Detection .....................................................20
Antenna Connection.........................................................20
UHF CB OPERATING FREQUENCIES ..........................................21
CTCSS TONE FREQUENCY CHART.............................................22
DCS TONE CHART.....................................................................23
SPECIFICATIONS ......................................................................24
SC CONTRACT WARRANTY AGAINST DEFECTS.........................26
CONTENTS
INTRODUCTION
The TX3100 is Australian designed and engineered to
produce an extremely compact mobile radio with outstanding
specifications and performance.
The TX3100, with its front mounted controls, is designed for
unobtrusive mounting in modern vehicles. Its innovative features
include a built-in loud speaker housed within an extremely
compact case.

TX3100 INSTRUCTION MANUAL PAGE 3
IMPORTANT INFORMATION CONCERNING
UHF CB RADIO
The use of the Citizen Band radio service is licensed in Australia by the
ACMA Radio communications (Citizens Band Radio Stations) Class
Licence and in New Zealand by the Ministry of Economic Development
New Zealand (MED). A General User Radio Licence for Citizens Band
radio and operation is subject to conditions contained in those licences.
The class licence for users and equipment operating in the CB/PRS 477
MHz band has been amended. This radio meets the new 80 channel
standard.
In simple terms the same amount of spectrum is available; however,
radio transceivers can now operate in a narrower bandwidth and hence
use less spectrum. These radios are generally referred to as narrowband
or 12.5 kHz radios.
By using 12.5 kHz channel spacing instead of 25 kHz, the 40 channels
originally allocated can now be expanded to 80 channels thereby
doubling the channel capacity and relieving congestion in the UHF CB/
PRS band.
Original 40 channel wideband Radios will continue to operate on the
original 40 channels, however they will not be able to converse on the
newer channels 41 – 80. The newer narrowband radios will be able to
converse with all older 40 channel wideband radios on all channels 1 to
40 as well as the newer channels allocated from 41 to 80.
The mixing of narrowband and wideband radios in the same spectrum
can cause some possible operating issues of interference and varying
levels of received volume.
POSSIBLE ISSUES
When a new narrowband radio receives a transmission from an
older wideband radio the speech may sound loud and distorted –
simply adjust your radio volume for best performance.
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.
ACCESSORIES SUPPLIED
Main Radio Unit
Mounting Bracket
Instruction Manual
Microphone
Microphone Clip
DC Lead
Screw Pack
Supplementary GME
model label
If any items are missing or
damaged, please contact your
retailer or place of purchase .

PAGE 4 INSTRUCTION MANUAL TX3100
The TX3100 uses advanced DSP processing to minimise the
possibility of interference on adjacent channels and the need to
adjust your volume control to compensate for wide/narrow
band reception.
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
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 TX3100 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.
SAFETY MOUNTING GUIDELINES
FOR PLUG ‘N’ PLAY
The TX3100 Plug ‘n’ Play (TX3100PNP) is supplied with a suction
mount bracket - Part No: MB043, designed to hold the TX3100
UHF CB radio so that it can be remotely mounted onto the
windscreen within the vehicle or alternatively on a flat surface
where the suction base can take hold.
In order to ensure driver safety when using the TX3100
Plug ‘n’ Play, GME provides the following recommendations
and guidelines;
• The product should not be mounted in a way that blocks the
driver’s field of vision of the road.
• When mounting on the driver’s side of the front windscreen,
it is recommended the suction be placed as close as possible
to the corner of the windscreen to minimise interruption to the
driver’s field of vision.
• If fitted elsewhere on the windscreen it should be low down to
ensure the driver’s field of vision is not blocked.
•If it is not possible or practical due to the design of the dash or
the driver’s seating position, the unit may be placed low down
in the centre of the windscreen.
• The unit must not be located in a position that could
potentially cause injury during a crash – such as a head strike
to the unit. Airbag deployment should also be considered
when mounting the unit.
• Mounting the unit high up on any part of the windscreen is not
recommended as it may cause an interruption to the driver’s

TX3100 INSTRUCTION MANUAL PAGE 5
field of vision or interfere with rear view mirrors and sun
visors. It may also result in the DC power lead trailing in the
field of vision.
• Deciding on the location of the unit should also factor where
power leads may need to run to avoid the possibility of them
interfering with or becoming entangled in vehicle controls.
• Covering or restricting access to dash instruments and controls
is not recommended.
The responsibility of deciding the location of where the unit is
mounted rests entirely with the end-user and should be carefully
considered to ensure compliance with any state or federal laws.
FEATURES
•Microprocessor Controlled Frequency Synthesiser:
Allows user programmable control of scanning, channel
memories and selected feature options.
•
Advanced Signal Management (ASM): Identifies
interference caused by strong local signals on adjacent
channels and prevents these from opening your squelch.
ASM also minimises distortion on reception by fine tuning the
receiver frequency to match that of the incoming signal.
• Dynamic Volume Control (DVC): Automatically
compensates for variations in received audio level resulting in
a constant audio output level to the speaker.
•Programmable Scan Function: Scans the programmable
UHF CB channels.
•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.
•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.
•Flip Feature: Unit can be mounted with the speaker facing
upwards or downwards and the display ‘flipped over’ using
a simple key-press sequence to allow viewing of the display
from either mounting orientation. Keys use symbols to provide
readability in all installations.
•Compact Size: Fits into the smallest locations allowing
installations in even the most ‘space challenged’
environments.
•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.
•Designed and Engineered in Australia

PAGE 6 INSTRUCTION MANUAL TX3100
GENERAL OPERATION
S
TX3100
S
BASIC CONTROLS
LCD
Microphone Socket
Transmit
Squelch Icon
Scan Icon
Channel Display
Silent (CTCSS) Icon
DCS Icon
Power
Scan Squelch
LCD
Volume
Channel

TX3100 INSTRUCTION MANUAL PAGE 7
MICROPHONE
UNIQUE FLIP FEATURE
The TX3100 has a unique Display Flip function that allows the
unit to be installed upside down, if required, and the display read
from either orientation.
For more information on this feature please refer to Flipping the
Display under Installation on page 18.
POWER
To turn the TX3100 ON, briefly press the key.
To turn the TX3100 OFF, press and hold the key.
VOLUME
Press the or keys to increase or decrease the volume. The
radio will beep with each key press and the display will flash
to indicate the volume setting is being displayed. The volume
level can be set from 00 (min) to 31 (max). The display will stop
flashing and will return to displaying the selected channel a few
seconds after the last volume adjustment.
NOTE: At the 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
through the channels.
TRANSMITTING
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.
Push-To-Talk (PTT)

PAGE 8 INSTRUCTION MANUAL TX3100
SQUELCH CONTROL
Squelch control is used to eliminate the background noise when
there are no signals present. The TX3100 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 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 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 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
TX3100 has nine (9) preset Squelch sensitivity settings.
To adjust the preset Squelch sensitivity
Press and hold the key while immediately pressing the
or keys. The icon will flash and the preset squelch level
will be displayed as -1 to -9 . The minimum squelch level of -1
is the most sensitive and will allow the squelch to open on very
weak signals. Setting the squelch to the maximum setting of -9
will require very strong signals to open the squelch. The default
setting is -3 which generally provides reliable squelch operation
for most applications.
NOTE: After pressing the key you should begin pressing
the or keys immediately (within 2 seconds) otherwise the
‘Silent’ mode may be activated. See ENABLING CTCSS/DCS
ON A CHANNEL on page 9.
Setting the Squelch sensitivity

TX3100 INSTRUCTION MANUAL PAGE 9
BACKLIGHT
When the radio is on, briefly press the key to cycle through the
brightness levels for the LCD and keypad lighting. There are 5 levels
of lighting from off to full brightness. Each key press increases the
brightness until maximum brightness is reached. The next key press
resets the brightness level to off and the cycle repeats.
DYNAMIC VOLUME CONTROL (DVC)
The modulation level of signals heard on the UHF CB band has
always varied considerably resulting in noticeable differences in
received audio volume between stations. Generally users have
compensated for this by adjusting the volume control for each
received signal. With the introduction of 80 channel narrowband
transmissions that use lower levels of modulation, the diversity in
received audio volume is likely to increase further.
The TX3100 is able to automatically compensate for these
variations in received audio level by utilising a Dynamic Volume
Control. This feature automatically compensates for variations in
received audio level resulting in a constant audio output level to
the speaker to greatly enhance the quality of the reception.
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.
Vehicle
Simplex/Duplex Range Comparison
Simplex
Repeater
operation
Channel 31
Channel 1
Repeater
Station
Channel 1
Channel 31
Vehicle
Off Very Low Low Medium High

PAGE 10 INSTRUCTION MANUAL TX3100
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
The TX3100 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. Press and hold the key and immediately press the
key. The ‘0’ in the channel number will change to ‘r’ if
channel 1 – 8 is selected to indicate that channel is now set
as a repeater channel. The ‘0’ in the channel will change to
’u’ to indicate the channel is now set as an upper repeater
channel, if channel 41 – 48 is selected.
Eg: Channel 2 will be displayed as ‘02’ when in simplex mode
but will change to ‘r2’ when duplex is activated on that channel.
Channel 42 will be displayed as ‘42’ when in simplex mode but
will change to ‘u2’ when duplex is activated on that channel.
Channel 2 Duplex (repeater)
Channel 42 Duplex (repeater)
Channel 2 Simplex