GME TX675 User manual

INSTRUCTION MANUAL
2 watt UHF CB handheld radio
GLOSS white art stock - 130gsm
TRIMMED document size: 93 mm (w) x 172 mm (h) 24 pages
BOOK to be saddlestiched in 2 places
PRINTED in CMYK throughout with gloss Aq Varnish

PAGE 2 INSTRUCTION MANUAL TX675
Contents
SAFETY INFORMATION......................... 2
IMPORTANT INFORMATION
CONCERNING UHF CB RADIO.............. 3
Possible issues................................ 3
Emergency channels ....................... 4
Telemetry channels ......................... 4
IMPORTANT ADVICE............................. 4
SUPPLIED WITH.................................... 4
OPTIONAL ACCESSORIES...................... 5
FEATURES............................................ 5
CONTROLS........................................... 6
LCD ICONS ......................................... 7
CHARGING THE BATTERY..................... 8
To remove the battery pack............. 8
To refit the battery pack.................. 8
Charging the battery pack .............. 8
Charging the TX675 single unit....... 9
In-vehicle charging ......................... 9
Charging the TX675 twin pack ....... 9
BATTERY USAGE .................................. 10
Battery low alert............................. 10
Conserving battery power............... 10
Standby mode................................. 10
Using CTCSS/DCS ........................... 10
Scanning......................................... 10
Low transmit power settings........... 10
GENERAL OPERATION.......................... 11
Power on/off................................... 11
Adjusting the volume...................... 11
Display lighting............................... 11
Receiving signals ............................ 11
Transmitting ................................... 11
Selecting channels.......................... 11
Squelch........................................... 12
Keypad Lock ................................... 12
Duplex operation............................ 12
SCANNING .......................................... 13
To add or remove scan channels ..... 13
To scan ........................................... 13
Scanning features ........................... 13
CTCSS, DCS AND SILENT MODE............ 14
MENU.................................................. 14
Using the menu .............................. 15
Duplex mode selection.................... 15
CTCSS and DCS code selection ....... 15
Transmitter power........................... 16
VOX settings................................... 17
Squelch level setting....................... 17
Roger Beep tone............................. 17
Button Beep.................................... 18
Call Alarm selection........................ 18
Dual Watch..................................... 18
Dual Watch operation..................... 19
CTCSS TONE FREQUENCIES.................. 19
DSC TONE CHART................................. 20
UHF CB OPERATING FREQUENCIES ...... 21
SPECIFICATIONS .................................. 22
SC CONTRACT WARRANTY AGAINST
DEFECTS.............................................. 23
sAFetY InFoRMAtIon
The TX675 is a radio transmitting device.
• When transmitting, keep the antenna more than 25 mm from any part of the
head or body.
• Do not transmit near electrical blasting equipment or in explosive atmospheres.
• Do not allow children to operate a radio transmitter unsupervised.

TX675 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
Radiocommunications (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 – 40 as well as the newer channels
allocated from 41 – 80.
The mixing of narrowband and wideband radios in the same spectrum can
cause some possible operating issues of interference and varying levels of
received volume.
POSSIBLE ISSUES
When a new narrowband radio receives a transmission from an older wideband
radio the speech may sound loud and distorted – simply adjust your radio volume
for best performance.
When an older wideband radio receives a signal from a new narrowband radio,
the speech may sound quiet – simply adjust your radio volume for
best performance.
Depending on how close your receiving radio is to another transmitting radio,
there can be interference from the transmitting radio if it is using a channel
adjacent to the channel you are listening to. Simply try going up or down a few
channels from the currently selected channel.
The above situations are not a fault of the radio but a symptom of operating
wideband and narrowband radios in the same bandwidth. This possible
interference will decrease over time as the population of wideband radios ages
and decreases.
Further information and updates are available from the Australian
Communications and Media Authority (ACMA) at www.acma.gov.au and the
Ministry of Economic Development (MED), Radio Spectrum Management at:
www.rsm.govt.nz

PAGE 4 INSTRUCTION MANUAL TX675
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 channel 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 radio has a transmit-inhibit applied to channels 22 and 23.
In the event that 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.
IMPoRtAnt ADVICe
READ ALL INSTRUCTIONS carefully
and completely before operating your
radio and retain this manual for future
reference.
• NEVER connect the radio to a power
source other than the supplied
battery. This may damage your radio.
• DO NOT place your radio in front of a
vehicle airbag.
• DO NOT use your radio with a
damaged antenna.
• DO NOT attempt to modify your
radio in any way.
• ALWAYS charge your radio at normal
room temperature.
• ALWAYS switch off your radio where
notices restrict the use of two–way
radio or mobile telephones.
• ONLY use GME approved
rechargeable battery packs with the
supplied charger.
• AVOID storing or charging your radio
in direct sunlight.
• AVOID storing or using your radio
where temperatures are below -20°C or
above +60°C.
sUPPlIeD wItH
TX675
• TX675 radio
• Belt clip
• Li-ion battery pack (1600 mAh)
• AC adaptor
• USB/Micro USB lead
• Instruction manual
TX675TP
• 2 x TX675 radios
• 2 x Li-ion battery packs (1600 mAh)
• 2 x belt clips
• Twin desktop charger
• AC adaptor
• 12V vehicle charger
• USB/Micro USB lead
• Instruction manual

TX675 INSTRUCTION MANUAL PAGE 5
FeAtURes
TRANSMIT (TX)
2.0/0.5 watt RF power: Selectable transmitter power allows you to conserve
battery power when transmitting in close range by using the Low Power setting.
Individually programmable Duplex function: User selectable for only those
individual channels in your area that have repeaters, leaving others free for use as
extra simplex channels.
RECEIVE (RX)
80†channels 477 MHz UHF CB
Power Save feature:
Conserves battery power by sleeping during periods of inactivity.
Calling Tone and Roger Beep: Alerts you to incoming calls.
Signal receive indicator
SCANNING AND MEMORY FUNCTIONS
Microprocessor controlled frequency synthesiser:
Allows user programmable control of scanning, channel memories and
selected feature options.
Programmable scan function: Scans up to 80 UHF CB channels.
Dual Watch: Monitors two channels simultaneously.
PRIVACY FUNCTIONS
CTCSS & DCS: A built-in Continuous Tone Coded Squelch System and a Digital
Coded Squelch option provide quiet channel operation.
PHYSICAL PROPERTIES
Flexible antenna
Rugged construction
USER CONTROLS AND INTERFACE
Keypad Lock: Prevents accidental button presses.
Backlit LCD: For night viewing.
† Refer to Page 3. Important information concerning UHF CB radio.
oPtIonAl ACCessoRIes
• Twin desktop charger (BCD017)
• USB 12V vehicle charger (BCV010)
• Leather carry case (LC008)
• Ear microphone (HS009)
• Speaker microphone (MC007)
• Clear acoustic tube and lapel microphone (HS010)

PAGE 6 INSTRUCTION MANUAL TX675
ContRols
Antenna
PTT (Push to Talk)
Squelch/Silent Key
Indicator LED
Lanyard mount
Volume control
Speaker
Microphone
Accessory jack
Belt clip
Battery
USB charge socket
LCD
Channel up key
Menu/Function key
Channel down key

TX675 INSTRUCTION MANUAL PAGE 7
LCD
Channel up key
Menu/Function key
Channel down key
lCD ICons
Monitor icon: Appears when
the Squelch is open.
Dual Watch icon: Appears when
Dual Watch is active.
VOX icon: Appears when VOX
mode is active.
Key Lock icon: Appears when
the keypad is locked.
Button Beep icon:
Appears when button
confirmation tones are on.
High Power icon: Appears
when High TX power is selected.
Function icon: Appears when
the function ‘F’ key is pressed to
activate secondary functions.
Low Power icon: Appears when
Low TX power is selected.
Scan icon: Flashes when radio
is scanning.
Battery icon: Displays battery
charge level.
Roger Beep icon:
Appears when the Roger Beep
tones are active.
Duplex icon: Appears on
channels where Duplex is enabled.
CTCSS/DCS Silent icon:
Indicates a CTCSS or DCS tone has
been set in the menu.
Transmit icon:
Appears when transmitting.
Receive icon:
Appears when receiving signals.
Power Save icon: Appears
when the radio is sleeping.
CTCSS/DCS display: Displays
the selected CTCSS or DCS tone
when Silent mode is active.
Channel display: Displays the
selected channel in use.

CHARGInG tHe BAtteRY
The TX675 is powered by a 3.7V Li-ion battery pack. The battery pack should be fully
charged before being used for the first time or if you have not used the radio for some
time. This will ensure maximum capacity is available.
TO REMOVE THE BATTERY PACK
1. Ensure that your radio is switched off.
2. Hold the radio upside-down.
3. Using your fingernail, slide the battery catch towards the front of the radio to
release the battery then slide the battery towards you. The battery pack should
separate from the radio.
Pull to release
TO REFIT THE BATTERY PACK
1. Ensure that your radio is switched off.
2. Align the slots in the battery pack with the battery guides on the back of the radio.
3. Slide the battery pack upwards as far as it will go until it ‘clicks’.
Slide to lock battery
CHARGING THE BATTERY PACK
NOTE: While the battery is charging, the indicator LED on the radio will light RED
and the battery icon on the display will animate to show the battery is charging. Once
the battery is fully charged, the radio’s indicator LED will change to GREEN and the
battery icon will show the full charge state.
PAGE 8 INSTRUCTION MANUAL TX675

TX675 INSTRUCTION MANUAL PAGE 9
CHARGING THE TX675 SINGLE UNIT
The TX675 is supplied with a 240V AC adaptor and a USB lead. The AC adaptor will
charge a fully discharged 1600 mAh battery pack to full capacity in around 4 hours.
To charge the radio
1. Plug the AC adaptor into a 240V AC outlet
2. Plug the USB lead into the USB socket on the AC adaptor and the micro USB
connector into the charging socket on the side of the radio.
The radio will begin charging. During this time the radio’s indicator LED will light RED
and the battery icon on the display will animate. Once the battery is fully charged,
the indicator LED will change to GREEN and the battery icon will show the fully
charge state.
IN-VEHICLE CHARGING
A 12V vehicle charger is available as an optional accessory. This will also charge your
TX675’s battery to full capacity in around 4 hours using 12V DC from your vehicle’s
accessory socket.
CHARGING THE TX675 TWIN PACK
The TX675 Twin Pack is supplied with a dual desktop charger, 240V AC adaptor,
12V vehicle charger and a USB lead.
Using the AC adaptor, the dual desktop charger will charge two fully discharged
1600 mAh battery packs to full capacity in around 4 hours.
If using the 12V vehicle charger with the dual desktop charger, two fully
discharged 1600 mAh battery packs can be charged to full capacity in around
8* hours (with radios switched off).
Both the AC charger and 12V vehicle charger can also be used to directly charge a
single TX675 radio in around 4 hours.
*NOTE: When using the 12V vehicle charger
to charge two radios via the dual desktop
charger, we recommend switching both
radios off while charging to ensure the
batteries reach their full charge in the
allotted 8 hour period. If one or more radios
remain switched on during the charging cycle
the batteries will achieve close to their full
charge in the allotted time but the indicator
LED may not switch to GREEN. This is due to
the lower charge current available from the
12V vehicle charger.
Desktop charger
TX675
Indicator LED
Rear cradle
USB lead from
AC or 12V
adaptor
Front cradle

PAGE 10 INSTRUCTION MANUAL TX675
BAtteRY UsAGe
The time taken to discharge the battery pack will depend on how you use the radio.
The battery pack supplied is powerful enough for up to two days of use under average
conditions using low power.
BATTERY LOW ALERT
When the battery icon blinks on the radio’s display, the battery level is low and the
battery pack should be recharged.
CONSERVING BATTERY POWER
The radio has built-in power saving features to help you get the maximum amount of
time between charges from your Li-ion battery pack. If you need to operate your radio
in a situation where you require maximum battery life (e.g. a remote site where there
is no convenient recharging facility nearby) the following hints can greatly reduce the
amount of power drawn from the battery pack.
STANDBY MODE
The radio will automatically enter the ‘Standby’ mode when it is inactive (i.e. not
transmitting or receiving signals).
While in Standby mode it will still check for incoming signals but it will draw
considerably less power from the battery pack. As soon as a signal is heard or the
keys are pressed the radio will ‘wake up’ again. This Standby mode is automatic and
by itself can extend the battery life by many hours.
USING CTCSS/DCS
If you are expecting to receive signals on a busy channel, you can program that
channel for CTCSS/DCS operation and get the other person to call you using the same
CTCSS/DCS tone. Your radio will then remain in Standby and ignore all other signals
until your selected CTCSS/DCS tone is received.
SCANNING
The radio draws more power from the battery pack when scanning than when
monitoring a single channel. This is because it must ‘wake up’ more often to monitor
each channel for activity. In addition, scanning increases the chance of finding a
signal thereby keeping the receiver ‘awake’ and the Squelch open more often.
LOW TRANSMIT POWER SETTINGS
The transmitter has both high and low power settings. If you are only operating over
short distances, are in a reasonably high location or are close to a local repeater, try
using the Low transmitter power setting. This reduces the transmitter power to 0.5
watts which increases the talk time available.

TX675 INSTRUCTION MANUAL PAGE 11
GeneRAl oPeRAtIon
POWER ON/OFF
Rotate the VOLUME control clockwise past the ‘click’ to turn the radio on. Rotate the
VOLUME control counter-clockwise past the click to turn the radio off again.
ADJUSTING THE VOLUME
With the unit powered on, rotate the VOLUME control clockwise to increase the
volume and counter-clockwise to decrease the volume.
DISPLAY LIGHTING
The LCD backlighting activates automatically whenever a key is pressed and turns off
automatically after about 5 seconds.
RECEIVING SIGNALS
While the radio is not receiving signals, it will remain in Standby mode to conserve
battery power and ‘SAVE’ will be displayed. When a signal is received, the LED
indicator on the upper edge of the radio will light GREEN and the icon will
appear on the display. Adjust the VOLUME control for a comfortable listening level.
If the incoming signal is encoded with a CTCSS or DCS tone matching the one set in
your radio, the LED indicator will light ORANGE and you will be able to hear the signal
in the speaker. If the LED indicator lights GREEN and the icon appears but you
cannot hear the signal, it is likely that the incoming signal is using a different CTCSS
or DCS tone to that selected in your radio (see Menu options for more details on
setting CTCSS/DCS tones).
If no further signals are received, the unit will return to Standby mode after a
few seconds.
TRANSMITTING
To transmit, press and hold the PTT (Push-To-Talk) switch. The other radio you are
talking to must be set to the same channel. Hold the radio approximately 5 – 8 cm
from your mouth with the antenna vertical and speak into the built-in microphone.
While the PTT switch is pressed, the LED indicator on the upper edge of the radio will
light RED and the icon will appear on the LCD. When you have finished speaking,
release the PTT switch to receive incoming signals (it is not possible to transmit and
receive at the same time). If no further signals are received, the unit will revert to
Standby mode.
TIP: The PTT switch can also be used to transmit a Call Alarm melody.
When the Call Alarm melody is enabled (see Menu options for more details on
Call Alarm settings), pressing the PTT switch twice quickly will play the Call Alarm
melody in the speaker of other radios on the same channel to alert them to your call.
During this time the icon is displayed and the LED indicator will light RED for
about 5 seconds. The Call Alarm can only be sent once per minute.
SELECTING CHANNELS
In the ‘Standby’ mode, press the key to step up one channel or the key to
step down one channel. Press and hold the or keys to quickly scroll through
the channels.

PAGE 12 INSTRUCTION MANUAL TX675
SQUELCH
The Squelch is used to eliminate the background noise when there are no signals
present. When the Squelch is open the receiver’s background noise can be heard.
When the Squelch is closed the receiver remains quiet while there are no signals
present but any incoming signals will override the Squelch and be heard in the speaker.
To open the Squelch, briefly press the SQL key. This will allow you to check the current
channel for activity before transmitting, particularly if you have CTCSS enabled. When
the Squelch is open, the LED indicator on the upper edge of the radio will light GREEN
and the and icons will appear on the display. During this time you will hear
static or hiss if the channel is clear. Do not transmit if you hear any signals.
To close the Squelch, briefly press the SQL key again.
NOTE: The Squelch sensitivity is preset in the Menu – Squelch Level setting (see Menu
options for more details on setting the Squelch sensitivity).
KEYPAD LOCK
The Keypad Lock disables the keys to prevent accidental key presses from changing
the preferred settings of the radio. When the keys are locked, the icon is displayed
and all key presses are ignored except for the PTT, SQL and the Keypad unlock function.
To lock the Keypad press the Fkey (the Ficon will appear) then hold the key.
The icon will appear on the display.
To cancel the Keypad Lock, press the Fkey then hold the key. The icon will disappear.
DUPLEX OPERATION
Duplex operation allows the radio to transmit on a different frequency to that which
it receives. This allows operation through repeater stations in your area. Repeaters
automatically re-transmit your signal over a much wider area, providing greatly
increased range. The Duplex mode only works on designated repeater channels 1 – 8
and 41 – 48. With Duplex selected on one of these channels, your radio actually
transmits 30 channels higher than it receives.
e.g. If Duplex is selected on channel 1, your radio will receive on channel 1 but will
transmit on channel 31.
Duplex can be enabled or disabled on individual channels. When Duplex is enabled on
the selected channel, is displayed.
The Duplex mode is set through the Menu.Please refer to the Menu options further below.
Simplex/Duplex Range Comparison
CHANNEL
31
CHANNEL
1
CHANNEL
1
CHANNEL
31
VEHICLE
SIMPLEX
REPEATER
OPERATION
VEHICLE
REPEATER
STATION

TX675 INSTRUCTION MANUAL PAGE 13
sCAnnInG
Channel scanning allows you to monitor all channels for incoming signals.
NOTE: While the radio is scanning, the Menu setting key is disabled.
TO ADD OR REMOVE SCAN CHANNELS
Press the or keys to select the required channel.
1. If the icon is visible, the selected channel is already in the Scan Memory.
• Press Ffollowed by SQL to remove the channel from the Scan Memory.
A low beep will be heard and the icon will disappear.
2. If the icon is not visible the selected channel is not presently in the
Scan Memory.
• Press Ffollowed by SQL to add the channel to the Scan Memory.
A high beep will be heard and the icon will appear.
TO SCAN
Briefly press Ffollowed by . The icon will flash and the channel numbers will
change as the radio scans through the channels. To change the scan direction while
scanning, briefly press or .
To stop scanning, briefly press Ffollowed by . The icon will stop flashing and
the radio will return to normal operation.
SCANNING FEATURES
• If a signal is received, the scan is paused allowing you to transmit and receive on
that channel. During this time the icon will continue to flash to show that the
scan is still active. Once the channel has been inactive for 5 seconds the scan will
automatically resume.
• Pressing the PTT switch while the radio is scanning will jump to the working
channel allowing you to transmit and receive on that channel (the working channel
is the channel the radio was on at the time the scan was activated). During this time
the icon will continue to flash to show that the scan is still active. Once the
working channel has been inactive for 5 seconds the scan will automatically resume.
• If the scan is paused on a busy channel that you don’t wish to listen to, press the
or keys to ‘skip’ over the channel and continue scanning.
TIP: The Scan mode will reduce the overall battery life because the Standby (battery
saver) feature is overridden. You should avoid scanning if the battery is running low
and you need to conserve power.

PAGE 14 INSTRUCTION MANUAL TX675
CtCss, DCs AnD sIlent MoDe
CTCSS (Continuous Tone Coded Squelch System) and DCS (Digital Coded Squelch) are
similar Squelch quieting systems that allow groups of users to share the same channel
without disturbing each other. The CTCSS system uses 1 of 50 low frequency tones
to open and close the Squelch on the radio. The DCS system is similar to CTCSS but
uses 1 of 104 digital codes to control the Squelch. When CTCSS or DCS is enabled on
your radio, only signals that are using the same code as your radio will be heard in the
speaker and the Squelch will remain closed to all other signals.
NOTE: CTCSS and DCS codes do not prevent others from hearing your transmission.
CTCSS/DCS tones are switched off by default. To use CTCSS/DCS you must first enable
a suitable CTCSS/DCS code using the Menu (see Menu options for more details).
Your choice of CTCSS or DCS will largely depend on which is currently being used by
other radios in your group. If neither system is currently in use, you can make your
own choice. There is no difference in performance between the two systems. Once a
CTCSS or DCS code has been enabled, the display will show (for CTCSS) or
(for DCS). You can now make selected channels ‘quiet’ by enabling Silent mode on
those channels.
To activate or deactivate Silent mode on a channel
1. Select the required channel.
2. Press and hold the SQL key. The selected CTCSS or DCS code will be displayed
on that channel.
Channels that have Silent mode enabled will now remain quiet unless a signal
containing your chosen code is received.
NOTE: Silent mode cannot be activated unless a CTCSS or DCS code has been
selected via the Menu key (See Menu options for more details). If CTCSS/DCS tones
are set to ‘Off’, any attempt to activate the Silent mode will be ignored. When
communicating with other radios using CTCSS or DCS, all radios must be switched to
the same channel and have the same CTCSS or DCS code selected. To receive signals
from radios that are not using CTCSS or DCS you will need to disable Silent mode on
that channel.
MenU
The Menu key is used to set the various feature settings. The following chart shows
the order of these selections.
#Description Symbol Options
1 Duplex (channels 1 – 8 and 41 – 48 only) on/oF
2 CTCSS and DCS code selection ct/dt oF/01 – 50/
001 – 104
3Transmitter power Po Hi/Lo

TX675 INSTRUCTION MANUAL PAGE 15
4VOX settings Vo oF/1 – 3
5Squelch level setting Sq Aut/1 – 5
6 Roger Beep setting rb oF/on
7 Button Beep selection bP oF/on
8 Call Alarm selection CL oF/1 – 5
9 Dual Watch channel du oF/on 1 – 80
NOTE: CTCSS/DCS and transmit power settings are inhibited on channels 5/35
(emergency channel).
USING THE MENU
To access the Menu, press and hold the MENU key until the radio beeps.
Menu options will appear in the order listed above.
To step to the next Menu item press the MENU key again. To change the options in
the selected Menu press the or keys. To store your selection and exit the Menu
press the PTT.
DUPLEX MODE SELECTION
The Duplex option only appears in the Menu if a repeater channel (1 – 8 or 41 – 48)
was selected prior to entering the menu.
To enable Duplex on the selected repeater channel
1. Select a repeater channel 1 – 8 or 41 – 48 using the or keys.
2. Press and hold the MENU key until the radio beeps. The icon will flash.
3. Press the or keys to toggle ‘on’ (duplex enabled) or ‘oF’ (duplex disabled)
on the display.
4. Press the PTT to store your setting and exit the Menu.
When Duplex is enabled on a repeater channel, the icon will be displayed on
that channel.
CTCSS AND DCS CODE SELECTION
The radio is fitted with both CTCSS and DCS systems. There are 50 CTCSS tones and
104 DCS codes. The DCS codes and the CTCSS tones are accessed through the same
menu (see table below). When CTCSS tones are being selected ‘ct’ is displayed.
To access DCS codes scroll past CTCSS tone 50 until ‘dt’ is displayed.
OFF
CT (CTCSS) DT (DCS)
01 50 001 104

PAGE 16 INSTRUCTION MANUAL TX675
To Select a CTCSS or DCS Code
1. Press and hold the MENU key until the radio beeps. ‘ct’ (for CTCSS) or ‘dt’ (for
DCS) will be displayed.
2. Press the or keys to select the required tone/code.
3. To select CTCSS tones 01 to 50 press the or keys while ‘ct’ is displayed.
When a CTCSS code is selected the icon is displayed.
4. To select DCS codes, hold the key to scroll past CTCSS tone 50 until ‘dt’ is
displayed. Now use the or keys to select the required DCS code 001 to 104.
When a DCS code is selected the icon is displayed.
5. To return to CTCSS tones hold the or keys until ‘ct’ is displayed again.
6. To turn CTCSS/DCS tones off, hold the or keys to step to the end of the code
list until ‘oF’ is displayed.
7. Press the PTT to confirm and store your selection. The (CTCSS) or icon
remains on the display to confirm the code system you have selected.
To enable Silent mode on a channel
1. Select the required channel.
2. Press and hold the SQL key for about 2 seconds. The selected code number will be
displayed on that channel.
3. The selected channel will now remain silent unless a signal is received containing
the chosen code.
NOTE: Silent mode will only be enabled on channels you select. Other channels will
remain open to all incoming signals.
To Disable Silent mode on a Channel
1. Select the required channel. The CTCSS/DCS Code will be displayed.
2. Press and hold the SQL key for about 2 seconds. The selected code number will
disappear from the display on that channel. The selected channel will now be open
to all incoming signals.
TRANSMITTER POWER
The transmitter power can be set to High or Low. The power setting applies to the
selected channel (except 5/35).
To Set the Transmit Power
1. Press and hold the MENU key until the radio beeps.
2. Briefly press the MENU key repeatedly until ‘Po’ is displayed. ‘Hi’ or ‘Lo’ will be
flashing.
3. Press the or keys to select the required power setting. Select ‘Hi’ for high
power or ‘Lo’ for low power.
4. Press the PTT to confirm and store your selection.
The radio should now display the selected channel number along with the HI or LO
icon to indicate the transmit power you have set.

TX675 INSTRUCTION MANUAL PAGE 17
VOX SETTINGS
The VOX feature allows you to have hands-free conversations. When you speak, the
microphone automatically detects your voice (or other nearby sound) causing the
radio to transmit without the need to press the PTT.
To enable VOX operation
1. Press and hold the MENU key until the radio beeps.
2. Briefly press the MENU key repeatedly until ‘Vo’ is displayed.
3. Press the or keys to set the VOX sensitivity from 1 (min) to 3 (max). A
minimum setting requires a louder voice to activate the VOX while a maximum
setting will activate the VOX with a much softer voice.
4. To disable the VOX completely, set the VOX sensitivity to ‘oF’.
5. Press the PTT key to confirm and store your selection.
When VOX is enabled, the icon is visible on the display.
NOTE: Using the radio in a noisy environment with the VOX sensitivity set to
maximum could cause the radio to transmit unexpectedly. If this happens simply
reduce the sensitivity setting.
SQUELCH LEVEL SETTING
The Squelch is designed to keep the radio quiet when there are no signals present.
The Squelch setting adjusts the sensitivity of the Squelch to incoming signals. Higher
Squelch settings require stronger signals to overcome the Squelch and be heard in the
speaker while lower settings allow much weaker signals to be heard.
To set the Squelch
1. Press and hold the MENU key until the radio beeps.
2. Press the MENU key repeatedly until ‘Sq’ is displayed. The current Squelch level
will flash.
3. Press the or keys to adjust the Squelch level from 1 (most sensitive) to 5
(least sensitive) or select AUT (Auto) for an automatic setting.
4. Press the PTT to confirm and store your selection.
ROGER BEEP TONE
The Roger Beep is a tone that is automatically transmitted whenever the PTT is
released. This tone serves to alert the receiving party that your transmission
has ended.
To Enable or Disable the Roger Beep Tone
1. Press and hold the MENU key until the radio beeps.
2. Press the MENU key repeatedly ‘Rb’ is displayed. The icon will be flashing.
3. Press the or keys to select ‘on’ or ‘oF’.
4. Press the PTT to confirm and store your selection.

PAGE 18 INSTRUCTION MANUAL TX675
BUTTON BEEP
The Button Beep allows the radio to sound a confirmation beep whenever the keys are
pressed. It also generates a confirmation tone whenever the radio is switched on.
To Turn the Button Beep On or Off
1. Press and hold the MENU key until the radio beeps.
2. Press the MENU key repeatedly until ‘bP’ is displayed. The icon will
be flashing.
3. Press the or keys to select ‘on’ or ‘oF’.
4. Press the PTT to confirm and store your selection.
When the Button Beep is enabled the icon will be displayed and a beep will be
heard whenever a key is pressed.
CALL ALARM SELECTION
The radio provides 5 user-selectable Call Alarm melodies to alert other users to your
incoming call. When enabled, the melody can be transmitted to another user where it
will be heard in the speaker of the receiving radio.
To Select your Favourite Call Alarm Melody
1. Press and hold the MENU key until the radio beeps.
2. Press the MENU key repeatedly until ‘CL’ is displayed. Call number 1 – 5 or ‘oF’
will be flashing.
3. Press the or keys to preview (listen to) the 5 available Call Melodies (1 – 5).
NOTE: You will not be able to preview the Call Alarm Melodies unless the Button
Beeps have been enabled.
4. To disable the Call Melodies select ‘oF’.
5. Press the PTT to confirm and store your selection.
To send the Call Alarm Melody
Press the PTT TWICE quickly. The icon will appear and the LED indicator will light
RED for a few seconds as the melody is sent. The melody will be heard in the speaker
of the receiving radio.
NOTE: The Call Alarm can only be sent once per minute.
DUAL WATCH
The Dual Watch mode lets you to monitor two channels at the same time. While in
Dual Watch mode, the unit will monitor both the selected channel and a second Dual
Watch channel.
To Set the Dual Watch Mode
1. Use the or keys to choose the ‘selected’ channel.
2. Press and hold the MENU key until the radio beeps.
3. Press the MENU key repeatedly until ‘du’ is displayed. The icon will
be flashing.

TX675 INSTRUCTION MANUAL PAGE 19
CtCss tone FReQUenCIes
NO. FREQUENCY NO. FREQUENCY NO. FREQUENCY NO. FREQUENCY
167.0 14 107.2 27 167.9 40 159.8
271.9 15 110.9 28 173.8 41 165.5
374.4 16 114.8 29 179.9 42 171.3
477.0 17 118.8 30 186.2 43 177.3
579.7 18 123.0 31 192.8 44 183.5
682.5 19 127.3 32 203.5 45 189.9
785.4 20 131.8 33 210.7 46 196.6
888.5 21 136.5 34 218.1 47 199.5
991.5 22 141.3 35 225.7 48 206.5
10 94.8 23 146.2 36 233.6 49 229.1
11 97.4 24 151.4 37 241.8 50 254.1
12 100.0 25 156.7 38 250.3 – –
13 103.5 26 162.2 39 69.4 – –
4. Press the or keys to select the second ‘Dual Watch’ channel or select ‘oF’ to
disable the Dual Watch mode.
5. Press the PTT to confirm and store your selection.
While Dual Watch is active, the icon is displayed and the LCD will alternate
between the selected channel and the Dual Watch channel.
DUAL WATCH OPERATION
• If a signal is received on either channel, the radio will pause on that channel for
as long as it remains busy, then resume the Dual Watch 5 seconds after the last
transmission has ceased.
• To talk on the Dual Watch channel, press the PTT while the radio is paused on that
channel then talk in the usual way.
• To talk on the selected channel, press the PTT while no signals are being
received. The radio will switch to the selected channel. When you have finished
your conversation the radio will resume the Dual Watch 5 seconds after the last
transmission has ceased.
To stop the Dual Watch, briefly press the MENU key followed by the key. This is
equivalent to selecting ‘oF’ in the Dual Watch menu setting.

PAGE 20 INSTRUCTION MANUAL TX675 / TX675
DsC tone CHARt
DCS CODE DCS CODE DCS CODE DCS CODE DCS CODE DCS CODE
1 023 19 116 37 225 55 325 73 452 91 627
2 025 20 122 38 226 56 331 74 454 92 631
3 026 21 125 39 243 57 332 75 455 93 632
4 031 22 131 40 244 58 343 76 462 94 654
5 032 23 132 41 245 59 346 77 464 95 662
6 036 24 134 42 246 60 351 78 465 96 664
7 043 25 143 43 251 61 356 79 466 97 703
8 047 26 145 44 252 62 364 80 503 98 712
9 051 27 152 45 255 63 365 81 506 99 723
10 053 28 155 46 261 64 371 82 516 100 731
11 054 29 156 47 263 65 411 83 523 101 732
12 065 30 162 48 265 66 412 84 526 102 734
13 071 31 165 49 266 67 413 85 532 103 743
14 072 32 172 50 271 68 423 86 546 104 754
15 073 33 174 51 274 69 431 87 565 – –
16 074 34 205 52 306 70 432 88 606 – –
17 114 35 212 53 311 71 445 89 612 – –
18 115 36 223 54 315 72 446 90 624 – –