GME TX4600 User manual
TX4600 INSTRUCTION MANUAL PAGE 1
Ingress protected 5 watt UHF CB radio
INSTRUCTION MANUAL
32 pp FOLDED ONCE TO 116 X 185 MM STITCHED WITH 2 WIRES
PRINT CMYK ON 130 GSM GLOSS ART
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PAGE 2 INSTRUCTION MANUAL TX4600
IMPORTANT INFORMATION.........................................3
SAFETY INFORMATION................................................3
EMERGENCY CHANNELS.............................................3
TELEMETRY CHANNELS...............................................3
FEATURES...................................................................4
CONTROLS..................................................................5
Front Panel............................................................5
LCD Display...........................................................5
Microphone...........................................................5
GENERAL OPERATION.................................................6
Function Key .........................................................6
Volume On/Off ......................................................6
Selecting Channels ................................................6
Transmitting ..........................................................6
Squelch Control.....................................................6
Squelch Sensitivity.................................................6
Priority Channel.....................................................7
Duplex Operation ..................................................7
CTCSS.........................................................................7
Overview...............................................................7
Monitoring the Channel........................................7
Selecting the Tone Set ...........................................7
Selecting the Required CTCSS Tone........................7
Enabling CTCSS on a Channel................................7
Disabling CTCSS on a Channel...............................8
SCANNING .................................................................8
Overview...............................................................8
Scan Groups..........................................................8
Selecting the Scan Group.......................................8
Programming Scan Channels .................................8
To Start Scanning ..................................................9
To Stop Scanning...................................................9
OPEN SCAN MODE .....................................................9
Using Scan in the Open Scan Mode .......................9
GROUP SCAN MODE...................................................9
Setting Up the Group Scan ..................................10
Scanning in the Group Scan Mode.......................10
Using Two Group Scan or Two Open Scan Modes .10
SELECTIVE CALLING..................................................11
Overview.............................................................11
SelCall Identification Number...............................11
SelCall Indent Names ..........................................11
The Quiet Mode (Q).............................................11
SelCall Memories.................................................12
USING SELCALL ........................................................12
Entering a SelCall Indent .....................................12
Sending a SelCall ................................................12
Call Acknowledge................................................12
Storing SelCall Indents.........................................12
Recalling SelCall Indents From Memory................13
Naming Your SelCall Indents................................13
Displaying Alpha Names ......................................13
Entering and Storing a SelCall Name....................13
Receiving SelCalls................................................14
Cancelling the SelCall Alert..................................14
Quiet Mode.........................................................15
Setting Up the Quiet Mode..................................15
Activating the Quiet Mode...................................15
De-activating the Quiet Mode..............................15
Receiving Signals in the Quiet Mode ....................15
Scanning in the Quiet Mode ................................16
To Scan in the Quiet Mode ..................................16
Receiving Signals while Scanning in the Quiet Mode 16
GROUP CALLING.......................................................16
Programming and Sending Group Calls................17
LISTENING CHANNELS ..............................................17
Setting the Frequency Steps.................................18
Activating Listening Channels..............................18
Programming the Frequencies..............................18
Setting Alpha Labels for your Listening Channels..18
SEEK MODE ..............................................................19
Enabling the Seek Mode......................................19
Scanning for Active Frequencies in Seek Mode .....19
Setting Seek Mode Frequency Limits ....................19
MENU SETTINGS.......................................................20
Overview.............................................................20
Frequency / Alpha Adjustments ............................21
Setting the Squelch Sensitivity .............................21
Selecting the Scan Mode .....................................21
Selecting Duplex..................................................22
CTCSS Tones .......................................................22
Lamp Colour .......................................................23
Battery / S Metre / Alpha Selection.......................23
LCD Contrast.......................................................24
Beep Tone Level ..................................................24
INSTALLATION ..........................................................24
General...............................................................24
Installing the Unit................................................25
DC Connections ..................................................25
Antenna Installation............................................26
Noise Suppression...............................................26
Disconnecting the Microphone.............................26
UHF CB OPERATING FREQUENCIES ...........................27
CTCSS TONE FREQUENCY CHART ..............................28
SPECIFICATIONS .......................................................29
SC CONTRACT WARRANTY AGAINST DEFECTS..........30
CONTENTS
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TX4600 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.
SAFETY INFORMATION
The TX4600 is a radio transmitting device.
•Whentransmitting,keeptheantennamore
than 25 mm from any part of the head
or body.
•Donottransmitnearelectricalblasting
equipment or in explosive atmospheres.
•Donotallowchildrentooperatearadio
transmitter unsupervised.
POSSIBLE ISSUES
When a new narrowband radio receives a
transmission from an older wideband radio the
speech may sound loud and distorted - simply
adjust the radio volume for best performance.
When an older wideband radio receives a signal
from a new narrowband radio, it may sound quiet
- simply adjust your volume for best performance.
There can be interference from a transmitting
radio if it is close to another transmitting radio
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
EMERGENCYCHANNELS
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 CH5.
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 TX4600 has a
transmit inhibit applied to channels 22 and 23.
In the event additional telemetry/telecomand
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.
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PAGE 4 INSTRUCTION MANUAL TX4600
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.
RECEIVE (RX)
User Programmable Receive-Only Channels: Use the TX4600’s front panel controls to program up to
19 of your own receive-only channels in the 403-520 MHz frequency range.
Preset Squelch Control with user-selectable sensitivity.
SCANNING AND MEMORY FUNCTIONS
Microprocessor Controlled Frequency Synthesiser: Allows user programmable control of scanning,
channel memories and selected feature options.
Frequency Seek Function: With Band Edge Selection.
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.
Unique Page (Transpond) mode: Allows you to transfer an incoming SelCall to another radio if your
radio is unattended.
Quiet Mode: Selectable on individual channels, Quiet mode prevents incoming signals from being heard
on selected channels unless preceded by your SelCall code.
CTCSS: A built-in Continuous Tone Coded Squelch System 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.
Front Facing Speaker: Projects the sound forward for greater clarity.
Water & Dust proof IP67
:
Provides protection against dust and temporary immersion in water.
USER CONTROLS AND INTERFACE
Large 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.
Feature Disabling Function: Allows Scanning, Squelch, Duplex, Priority, Channel selection and CTCSS
features to be enabled or disabled to make the radio simpler to operate.
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TX4600 INSTRUCTION MANUAL PAGE 5
CONTROLS
MICROPHONE
TX4600
MENU
F
SCAN
DIM
PRI
QUIET
SQL
ALPHA
OFF.
Volume On/Off
Microphone
Socket
Speaker Menu
FUNCTION
Scan
DIM
Priority
QUIET
Squelch
ALPHA
(Dim) Channel Down (Bright) Channel Up LCD Display
Channel UpChannel Down
Push To Talk
PPT
Priority
Call/Skip
FRONT PANEL
LCD DISPLAY
CALL TO
CALL FROM
Transmit
Indicator
Duplex
indicator
Busy
Indicator
Scan Indicator
QUIET Mode
CTCSS
Indicator
Channel in
Memory
Indicator
QUIET Tag
SelCall
Call Mode Alpha Numeric
Display
Channel Number
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PAGE 6 INSTRUCTION MANUAL TX4600
GENERAL OPERATION
FUNCTION KEY
The four keys beneath the TX4600’s display have
both primary and secondary functions. Their
primary functions are printed in Black while their
secondary functions are printed in Red.
To access the primary functions
Simply press the required key. eg. To control the
Squelch, briefly press the SQL key.
To access the secondary functions
Press the Fkey followed immediately by the
required key. Eg. To Dim the display, briefly press
the Fkey (‘F’ is displayed), then press the DIM
key. The display will dim.
NOTE: If the secondary key is not pressed within
10 seconds the Fkey selection will be cancelled.
VOLUME ON/OFF
Rotate the volume control clockwise past the
‘click’ to turn the TX4600 on. Continue to
advance the control clockwise to increase the
volume. Rotate the control counterclockwise to
turn the radio off.
NOTE: At minimum volume setting there is still
sufficient volume to be heard in a quiet cabin
environment.
SELECTING CHANNELS
Briefly press the Channel key to step upwards
one channel or the Channel key to step
downwards one channel. A high beep will be
heard at each press.
Press and hold the or key for 1.5 seconds
to scroll quickly upwards or downwards through
the channels at a rate of 10 channels per second.
When the key is released channel scrolling stops.
TRANSMITTING
Prior to transmitting, always check the channel
is not being used. This can be done by either
listening or by checking the ‘Busy’ indicator is
not lit.
To transmit, press the PTT (Push-to-Talk) button
on the microphone. 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.
SQUELCH CONTROL.
The Squelch control is used to eliminate the
background noise when there are no signals
present. The TX4600 features a preset Squelch
system. The Squelch sensitivity has been factory
set to provide optimum performance in most
environments, however the sensitivity can be
altered by the user if required, to suit varying
environmental situations.
The Squelch can be opened or closed with the
SQL key. When the Squelch is open, the receiver’s
background noise can be heard and ‘BUSY’
is displayed. When the Squelch is closed, the
receiver remains quiet when there are no signals
present but an incoming signal will override the
squelch and be heard in the speaker.
To open the Squelch
Briefly press the SQL key. A low beep will be
heard. If there are no signals present you will
hear the receiver’s background noise.
To close the Squelch
Briefly press the SQL key again. A high beep will
be heard and the receiver will become quiet.
NOTE: If an incoming signal is very weak
and is close to the minimum squelch level,
it may become broken or ‘chopped’ by the
squelch action. To prevent this, simply open
the Squelch to allow the signal to be heard
clearly. Alternatively you can reduce the Squelch
sensitivity as described below.
SQUELCH SENSITIVITY
The sensitivity of the Squelch to incoming signals
can be set to suit your operating environment. For
example, excessively noisy environments may cause
the squelch to open on local noise. The TX4600
has ten preset Squelch sensitivity settings that
can be selected using the MENU function.
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TX4600 INSTRUCTION MANUAL PAGE 7
To adjust the preset Squelch sensitivity
Please refer to the MENU settings on page 21.
PRIORITY CHANNEL
The Priority Channel feature allows you to store
one of the channels as a Priority Channel that
can be instantly recalled at the press of a key.
This can be used to provide instant access to your
working channel or your local repeater channel.
To store a Priority Channel
1. Select the required channel.
2. Press and hold the PRI key until a high beep is
heard. The selected channel will be stored.
To recall a Priority Channel
Briefly press the PRI key. The radio will switch
straight to the selected Priority Channel. Any
active functions (such as Scanning or Quiet) will
be cancelled.
DUPLEX OPERATION
Duplex operation allows the radio to transmit on
a different frequency to that which is receives.
This allows operation through local repeater
stations. These repeater stations automatically
re-transmit your signal over a wider area,
providing greatly increased range.
Duplex operation is only available 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.
To select Duplex operation please refer to the
MENU settings on Page 22.
CTCSS
OVERVIEW
CTCSS (Continuous Tone Coded Squelch System)
is a squelch quieting system that allows several
groups of users to share the same channel
without disturbing each other. It uses a preset
sub-audible (very low frequency) tone to open
and close the squelch on your radio. There are up
to 50 tones available in two optional tone sets.
The system applies a continuous low-level tone
to your transmission and uses a matching tone
decoder to control your receiver’s squelch. With
CTCSS 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 TX4600 allows CTCSS to be enabled or
disabled on individual channels.
NOTE: The CTCSS tone you select will be used
for all CTCSS enabled channels in your radio.
MONITORING THE CHANNEL
It is useful to be able to temporarily open your
radio’s squelch to allow you to listen for signals
from other CTCSS users outside your group.
Because their CTCSS tone is different to yours,
your squelch would normally remain closed,
preventing you from hearing them. You can
use the SQL key to open the squelch and listen
to the channel to check that it is clear before
transmitting.This will help prevent you from
accidentally transmitting over the top of someone.
To monitor the Channel
Press the SQL key. If there are no signals present,
you will hear the usual hiss of an empty channel.
Press the SQL key again to restore the Squelch to
its previous setting.
SELECTING THE TONE SET
There are two standard tones sets available, one
comprising 50 tones and the other comprising 38
tones. Both tone sets are included in the TX4600 to
provide compatibility with other GME radio systems.
SELECTING THE REQUIRED CTCSS TONE
To preselect the CTCSS tone on your radio, please
refer to the MENU settings on page 22.
ENABLING CTCSS ON A CHANNEL
If a CTCSS tone has been selected, it can be
enabled on individual channels.
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PAGE 8 INSTRUCTION MANUAL TX4600
1. Press the or keys to select the required
channel.
2. Press and hold the SQL key. A high beep
will be heardand ‘SILENT’ will appear on the
display.
You may activate CTCSS on as many channels
as you wish except channel 5/35 which is
designated for emergency use.
DISABLING CTCSS ON A CHANNEL
Repeat steps 1 and 2 above. A low beep will be
heard and ‘SILENT’ will disappear.
NOTE: You will not be able to activate CTCSS if
the CTCSS tone is set to ‘oF’.
SCANNING
OVERVIEW
The TX4600 has a SCAN function that allows
groups of user programmable channels to be
scanned for signals. Channels can be scanned at
20 channels per second. When a signal is found,
scanning will pause on that channel to allow the
signal to be heard, then resume scanning when
the channel is clear again.
SCAN GROUPS
The TX4600 features two scan groups - Open
Scan and Group Scan.
Open Scan
Allows any of the installed channels to be
scanned for activity. If a busy channel is found,
scanning will pause to allow the signal to be
heard. Once the channel has been clear for 5
seconds, scanning will resume automatically.
eg: Scanning channels 1 - 8 in Open Scan
Group Scan
Also allows any of the installed channels to be
scanned for activity, but in addition, it 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 take precedence over
any signals received on the other channels.
213420 567820
eg: Scanning channels 1 - 8 with Priority channel
20 in Group Scan.
SELECTING A SCAN GROUP
To preselect a Scan Group
The radio is initially set to Open Scan Mode. Please
refer to the MENU settings on page 21 to change
the Scan Group.
PROGRAMMING SCAN CHANNELS
Your TX4600 is supplied with all 80 UHF CB
channels programmed into the Open Scan
memory. Any channels not needed, can be
removed if required. The Group Scan memory is
empty by default and you will need to add
channels to it before use.
To add or remove Channels from either
Scan Memory
1. Ensure that the radio is not already scanning.
If it is, briefly press the SCAN key to cancel
the scan function.
2. Ensure you have the required scan group
preselected (See MENU settings on page 21).
3. Select the required channel using the or
keys.
•If‘M’isvisibletotherightofthechannel
number, the selected channel is already in the
scan memory. It can be removed by holding
the SCAN key in for a few seconds until a
21 345678
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TX4600 INSTRUCTION MANUAL PAGE 9
low beep is heard. ‘M’ will then disappear
indicating the channel is no longer in memory
•If‘M’isnotvisible,thentheselectedchannel
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.
4. Repeat step 3 to add or remove other
channels in the scan memory.
TO START SCANNING
To begin scanning, briefly press the SCAN key.
A high beep will be heard, ‘SCAN’ will appear
in the display and the radio will begin scanning.
In addition the selected scan group will be
displayed below the channel number.
NOTE: If there is only one channel programmed
into the Open Scan memory or none in the Group
Scan memory, a long low beep will be heard
when you press the SCAN key and the command
will be ignored.
TO STOP SCANNING
To cancel the Scan, briefly press the SCAN key. A
low beep will be heard and ‘SCAN’ will disappear
from the display.
OPEN SCAN MODE
USING SCAN IN THE OPEN SCAN
MODE
•Ifabusychannelisfound,scanningwillpause
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.
•Ifyourradiopausesonabusychanneland
you don’t wish to listen to that conversation,
briefly press the SKIP button on the
microphone (or one of the channel selector
keys). The radio will skip over that channel and
resume scanning from the next channel in the
sequence.
•Ifyourradioispausedonabusychanneland
you wish to remain there, briefly press the
SCAN key. The radio will exit the Scan mode
and remain on the busy channel.
•Totransmitwhilepausedonabusychannel,
simply press the PTT button. The radio will
exit the Scan mode and remain on the busy
channel. You can now converse on that
channel in the usual way. When you have
finished your conversation, briefly press the
SCAN key to resume scanning.
•Ifyourradioisscanningandyouneedtouse
your Priority channel (for an urgent call or an
emergency), briefly press the PRI key. The Scan
mode will be cancelled and the radio will jump
straight to the Priority channel.
NOTE: In the Open Scan mode your TX4600 will
not allow you to transmit while it is scanning. If
the PTT button is pressed while scanning, the
radio will give a low beep and will ignore the
command. Your radio will only transmit while it is
paused on a busy channel.
GROUP SCAN MODE
Group Scan allows you to transmit and receive
normally on your priority (working) channel,
while continuing to scan several other channels.
The receiver will scan the other channels ONLY
WHILE THERE ARE NO SIGNALS ON THE
PRIORITY CHANNEL.
If a signal appears on the Priority channel it will
override any signals being received on any of the
other channels. In addition, if you press the PTT
button at any time, the radio will transmit on the
priority channel in the usual way.
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PAGE 10 INSTRUCTION MANUAL TX4600
SETTING UP THE GROUP SCAN
Referring to the appropriate sections of this
manual:
1. Preselect the Group Scan mode (see MENU
settings on page 21).
2 . Store your preferred working channel into
the Priority channel memory (see ‘Priority
Channel’).
3. Program the required ‘other’ channels into
your Group Scan memory (see ‘Programming
Scan Channels’).
SCANNING IN THE GROUP SCAN
MODE
To scan in the Group Scan mode, briefly press
the SCAN key. A high beep will be heard, ‘SCAN’
will appear in the display and the radio will begin
scanning.
NOTE: If there are no channels programmed
in the Group Scan memory when you press
the SCAN key (or there is only one channel
programmed and it is the same as the Priority
channel), a low beep will be heard and the
command will be ignored.
When scanning, the TX4600 scans all the
channels programmed into the Group Scan
memory, with the Priority channel being scanned
after every fourth channel (Dealer programmable
option, if you require different timing for your
priority channel, please contact your dealer).
•Ifasignalappearsontheprioritychannel-at
any time - the receiver will switch straight to
the Priority channel and will stay there for as
long as the channel is busy. During this time
you can transmit on the priority channel in the
usual way. Once there has been no activity for
5 seconds, the radio will resume scanning the
other channels.
•Ifasignalappearsononeoftheother
channels, scanning will pause on that channel
and will remain there while the channel is
busy, as long as there are no signals on the
priority channel. During this time the receiver
will continue to check the priority channel for
signals every 2 seconds, resulting in a series of
small ‘breaks’ in the reception of the paused
channel. Once there has been no activity
on any channel for 5 seconds, the radio will
resume scanning.
•Ifyourradiopausesonabusychanneland
you don’t wish to listen to that conversation,
briefly press the SKIP button on the
microphone (or one of the channel selector
keys). The radio will skip over that channel and
resume scanning from the next channel in the
sequence.
•Ifyourradioispausedonabusychanneland
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 same as the busy
channel). To resume scanning, press the SCAN
key again.
•Totransmitonascannedchannel,pressthe
PTT button while the radio is paused on that
channel, then talk in the usual way. The radio
will resume scanning when you have finished
your conversation and there has been no
further activity on the channel for 5 seconds.
•Totransmitonthepriority(working)channel
AT ANY TIME, simply press the PTT button
while the radio is scanning. The radio will
switch straight to the priority channel. When
you have finished your conversation and there
has been no further activity on the priority
channel for 5 seconds, the radio will resume
scanning the other channels.
•TogodirectlytothePrioritychannel,brieypress
the PRI key. The radio will exit the Scan mode.
USING TWO GROUP SCAN OR TWO
OPEN SCAN MODES
If you prefer, the TX4600 can be re-programmed
to have two Group Scan modes or two Open
Scan modes instead of one of each.
For example there may be applications where you
have no need to scan the Priority channel and
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TX4600 INSTRUCTION MANUAL PAGE 11
would prefer to have two separate Open Scan
modes. Alternatively you may have applications
where you prefer to have two Group Scan modes
with different Scan groups in each.
Your TX4600 can be Dealer programmed to
convert the Group Scan mode into a second
Open Scan mode and vice versa. If you would
prefer to have two Group Scan or two Open Scan
modes, you should contact your GME Dealer to
arrange for this feature to be enabled (when
using two Group Scan modes the Priority channel
will be the same channel for both scan groups).
When the second Open or Group Scan mode is
enabled, the resulting two Scan modes become
Scan 1 and Scan 2. To select the required scan
mode, refer to the MENU settings on page 21.
When enabled, the two Scan modes will be
identical in operation. To program and operate
each, refer to the Open Scan/Group Scan sections
above.
NOTE: Enabling or disabling the second Open
or Group Scan mode is not a user selectable
option. Once enabled by your dealer, the changed
Scan mode becomes a permanent part of the
TX4600’s features and replaces the standard
Scan selection. If you find later that you need the
original Group or Open Scan function re-enabled,
you will need to return your TX4600 to your
dealer for re-programming.
SELECTIVE CALLING
OVERVIEW
Your TX4600 has a Selective Calling system
known as SelCall that operates like a telephone.
Your radio is pre-programmed with its own
unique SelCall Identification number. If this
number is called by another radio, your TX4600
will beep to alert you. If you do not want to hear
any other activity while waiting on a channel, you
can select the QUIET mode. This will force the
radio to remain quiet to all incoming signals until
your SelCall number is called.
Your TX4600 will allow you to store up to ten of
your most frequently called SelCall numbers in
memory and each number can be labelled with a
5-letter name for easy identification.
SELCALL IDENTIFICATION NUMBER
Your TX4600 is factory programmed with its own
unique SelCall Identification Number (Ident).
This number identifies your radio from others in
your area. Your radio’s own SelCall Ident will be
displayed for a few seconds, directly beneath the
channel display, when you first turn the radio on.
You will need to make your Ident known to
anyone who may need to call you using Selcall.
Whenever your TX4600 hears a SelCall signal,
it compares the incoming Ident with its own.
If the two Idents match, the radio knows it is
being called and sounds an alarm to alert you,
otherwise the call is ignored.
NOTE: Although your radio’s SelCall Ident is
pre-programmed at the factory, you can arrange
to have your dealer change it if required.
SELCALL IDENT NAMES
When storing SelCall Idents in memory, the
TX4600 allows you to add a 5 character name to
each one, making it easier to identify whose Ident
you are recalling from the memory. In addition,
if an incoming SelCall matches one of the Idents
stored in the memory, the name can be displayed
to make it easier for you to identify the caller.
To add or display names
Your TX4600 must be in the ALPHA mode. To
switch between ALPHA mode and NUMERIC
mode, briefly press the F(function) key followed
by the ALPHA key. ‘ALPHA’ or ‘NUMER’ will
be displayed for 2 seconds below the channel
display to indicate the selected mode.
THE QUIET MODE (Q)
Your TX4600 can be set to monitor signals on a
busy channel but remain QUIET unless it receives
its own SelCall Ident. In this way, you won’t be
disturbed unless someone calls you. When a
signal containing your SelCall Ident is received,
the QUIET mode is deactivated and an alarm
sounds to alert you to the call. You can then
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PAGE 12 INSTRUCTION MANUAL TX4600
converse normally on the channel. To use the
QUIET mode, refer to the QUIET Mode section
further below.
NOTE: The QUIET mode overrides the normal
Squelch system to ensure that the radio remains
quiet even when the channel is busy. When
QUIET is set, you may see the ‘BUSY’ icon
appear on the display indicating the channel is
being used. However, unless someone transmits
your SelCall Ident, nothing will be heard in the
speaker.
You can activate the QUIET mode on individual
channels ie. some channels can be set to remain
Quiet while others can remain open to all
incoming signals.
TIP: Setting the QUIET mode is not mandatory.
You can still use SelCall on any channel whether
the QUIET mode is set or not.
SELCALL MEMORIES
Your TX4600 is fitted with one ‘Call’ memory
and 10 SelCall Ident memories. The 10 SelCall
Ident memories are used to store frequently used
SelCall Idents. The additional ‘Call’ memory holds
the Ident you last sent or received. The memories
can be viewed by briefly pressing the CALL
button. The initial memory displayed is the ‘Call’
memory. Pressing the channel selection keys
will step through the other 10 SelCall storage
memories in sequence. SelCall memories are
labelled ‘c0’ to ‘c9’.
USING SELCALL
ENTERING A SELCALL IDENT
1. Press the CALL button. ‘CALL TO’ is displayed,
along with the last sent or received SelCall Ident.
NOTE: If an ALPHA label is displayed you will
need to switch to Numeric Mode. To toggle
between Alpha mode and Numeric mode, briefly
press the Fkey followed by the ALPHA key. A
high beep indicates Alpha mode is selected while
a low beep means the Numeric mode is selected.
2. Enter the required SelCall Ident as follows:
(a) Press and hold the Fkey until the radio
beeps. The right-hand digit of the SelCall
Ident will flash.
(b) Press the or keys to select the required
number in the flashing digit position.
(c) Briefly press the Fkey again to select the next
digit position.
(d) Repeat steps (b) and (c) to enter all 5 digits
as required. The SelCall number is now ready
to send.
SENDING A SELCALL
With the SelCall number displayed, press and
hold the CALL button for 2 seconds. A long beep
will be heard and the radio will transmit the
SelCall Ident.
NOTE: If the call is not sent within 10 seconds
of entering the last Ident digit the call mode
will time out and the radio will return to normal
mode. To exit the CALL TO mode without sending
the SelCall briefly press the CALL button.
CALL ACKNOWLEDGE
If your SelCall transmission is successful,
the radio you called should respond with an
‘acknowledge’ signal - usually two quick beeps.
This will confirm to you that the radio you called
is now alerting its user to your signal.
STORING SELCALL IDENTS
Your TX4600 is fitted with 10 user programmable
SelCall Ident memories, allowing you to store
up to 10 frequently used SelCall Idents. The
memories are accessed by pressing the CALL
button, then pressing the channel selector keys to
scroll through the memories. Ident memories are
CALL TO
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TX4600 INSTRUCTION MANUAL PAGE 13
labelled ‘c0’ to ‘c9’.
To store a SelCall Ident in memory
1. Press the CALL button to select the CALL TO
mode. ‘CALL TO’ is displayed along with the
last sent or received SelCall Ident.
2. Press channel selector keys to select the
required Ident memory (locations ‘c0’ to ‘c9’).
TIP: If the radio displays letters instead of
numbers in the SelCall Ident position, your radio
is in ALPHA mode. To switch back to NUMERIC
mode, briefly press the F(Function) key followed
immediately by the ALPHA key. A low beep will
be heard and ’NUMER’ will be displayed for a
few seconds in the Ident position.
3. With the required memory location displayed,
enter the SelCall Ident as follows:
(a) Press and hold the Fkey until the radio
beeps. The right-hand digit of the SelCall
Ident will flash.
(b) Press the or keys to select the required
number in the flashing digit position.
(c) Briefly press the Fkey again to select the next
digit position.
(d) Repeat steps (b) and (c) to enter all 5 digits
as required.
(e) Now press and hold the Fkey. The entire
Ident will flash for a few seconds then the
radio will beep as the new Ident is stored.
RECALLING SELCALL IDENTS FROM
MEMORY
1 Press the CALL button to select the CALL TO
mode. ‘CALL TO’ is displayed along with the
last sent or received SelCall Ident.
2. Press the or keys to select the required
Ident memory in locations ‘c0’ to ‘c9’.
3. When the required SelCall Memory is displayed,
press and hold the CALL button to send the
Ident.
NAMING YOUR SELCALL IDENTS
The TX4600 allows you to name each SelCall
Ident using a 5 character ALPHA name. The name
is stored in memory along with the Ident making
it easier to identify whose Ident you are recalling
from the memory. If an incoming SelCall matches
one of those in your radio’s memory, the name
can be displayed instead of the SelCall Ident.
DISPLAYING ALPHA NAMES
To display the Selcall’s ALPHA Name, you must
have the radio’s ALPHA display mode selected.
To toggle the ALPHA display mode, briefly press
the F(Function) key followed by the ALPHA
key. ‘ALPHA’ or ‘NUMER’ will be displayed for 2
seconds below the channel display to indicate the
selected mode.
TIP: The normal channel display may give no
indication of which display mode is selected. The
selected mode will only become obvious when
displaying Idents.
ENTERING AND STORING A SELCALL
NAME
NOTE: Before adding an ALPHA Name to a
SelCall Ident, you should first store the required
Ident in memory as described above under
‘STORING SelCall IDENTS’ on page 12.
1. Ensure the ALPHA mode is selected (briefly
press the Fkey followed by the ALPHA key to
toggle ALPHA mode).
2. Briefly press the CALL button. The CALL TO
mode will be selected and the last-sent SelCall
memory location will be displayed.
3. Press the or keys to select the required
SelCall memory (locations c0 to c9). If no
ALPHA name has been programmed for that
memory the radio will probably display ‘- - - -
-’ otherwise it will display the last ALPHA
name programmed into that memory.
4 With the required memory location displayed,
enter the required ALPHA name as follows:
(a) Press and hold the Fkey until the radio
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PAGE 14 INSTRUCTION MANUAL TX4600
beeps. The left-hand character of the ALPHA
name will flash. Press the Channel selector
keys to select the required letter in the
flashing character position.
The following characters are available:
A B C D E F G H I J K L M N O P Q
R S T U V W X Y Z _ SPACE - ,
0 1 2 3 4 5 6 7 8 9
TIP: Holding the channel selector key for a few
seconds will cause the radio to step quickly
through the available characters.
(b) Briefly press the Fkey again to select the
next character position.
(c) Repeat steps (b) and (c) to enter all 5
characters as required.
(d) Now press and hold the Fkey. The entire
ALPHA name will flash for a few seconds
then the radio will beep as the name is
stored.
Repeat the procedure to add ALPHA names to
any other SelCall Idents stored in memory.
To exit the CALL TO mode
Briefly press the CALL button. The radio will
return to normal operation.
NOTE: The radio can be left in the ALPHA display
mode so that an incoming SelCall matching one
of those in the radio’s memory will display the
name associated with that SelCall Ident instead
of the Ident itself. Any incoming Selcalls not
matching those in the memory will display ‘NEW’.
To display the SelCall Ident of that caller, briefly
press the Fkey followed by the ALPHA key to
return to the NUMERIC display mode.
RECEIVING SELCALLS
When your TX4600 receives its SelCall Ident,
an alarm will sound to alert you to the call.
Initially the alarm will beep urgently at 2 beeps
per second for around 10 seconds then slow
to around 1 beep every 3 seconds if the call
is not answered. It will then continue to beep
indefinitely until you cancel it (the way your
TX4600 handles the SelCall alert can be altered
by your Dealer).
In addition to the alarm, the words ‘CALL FROM’
will appear on the display along with the callers
SelCall Ident or ALPHA name to inform you of the
identity of the person calling. To switch between
the SelCall Ident and the ALPHA name briefly
press the Fkey followed by the ALPHA key.
CANCELLING THE SELCALL ALERT
The following are the recommended methods:
To cancel the Alarm and talk on the
Channel
Press the PTT switch and talk in the usual way.
The alarm will be cancelled and the channel will
be open for normal communication.
To return the Call
Press and hold the CALL button for a few seconds
until the radio beeps. The callers SelCall will be
sent to the caller.
CALL TO
CALL FROM
CALL FROM
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TX4600 INSTRUCTION MANUAL PAGE 15
To cancel the Alarm and listen on the
Channel
Briefly press the QUIET button (if QUIET has been
activated).The alarm will stop beeping and the
channel will remain open to any incoming signals.
QUIET MODE
The QUIET mode mutes the TX4600’s receiver to
prevent any incoming signals from being heard
in the speaker until your SelCall Ident is received.
In this way you can monitor a busy channel
for personal calls without being disturbed by
unwanted signals.
If your SelCall Ident is received, the QUIET mode
is then cancelled and all incoming signals are
heard in the speaker.
SETTING UP THE QUIET MODE
To setup the QUIET mode you must first ‘tag’
the channels that you want to stay Quiet, then
activate the QUIET mode. Once the QUIET mode
is activated, the channels you have tagged will
remain Quiet to all incoming signals unless your
SelCall Ident is received. Channels not tagged
will remain open to all signals and will operate
normally.
To tag individual Channels for QUIET
operation
1. Select the required channel using the or
keys.
2. Briefly press the Fkey then press and hold
the QUIET key until the radio beeps. ‘Q’ will
appear to the right of the channel display
indicating the selected channel is now tagged
for Quiet operation.
To remove the QUIET Tag from individual
Channels
1. Select a channel that has been tagged for
Quiet operation. ‘Q’ will be displayed.
2. Briefly press the Fkey then press and hold
the QUIET key until the radio beeps. ‘Q’ will
disappear indicating this channel is no longer
tagged for Quiet operation.
ACTIVATING THE QUIET MODE
1. First, select a channel that has been tagged for
Quiet operation (you cannot activate the Quiet
mode unless you have selected a ‘tagged’
channel). ‘Q’ will be displayed.
2. Now briefly press the Fkey followed by the
QUIET key. ‘QUIET’ will appear on the display.
Now all channels that were tagged for Quiet
operation will be operating in the Quiet Mode.
DE-ACTIVATING THE QUIET MODE
1. Select any channel that has been tagged
for Quiet operation. ‘Q’ and ‘QUIET’ will be
displayed.
2. Briefly press the F key followed by the QUIET
key. ‘QUIET’ will disappear from the display
and all channels that were tagged for Quiet
operation will now operate normally again.
RECEIVING SIGNALS IN THE QUIET
MODE
•IfanormalsignalisreceivedonaQUIET
channel, the channel will appear busy (the
‘BUSY’ indicator will be visible) but no sound
will be heard from the speaker. This means you
will not be disturbed by the signal.
•IfanormalsignalisreceivedonanOpen
channel (one that is not tagged with ‘Q’) the
signal will be heard in the usual way.
•IfasignalcontainingyourSelCallIdentis
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 ALPHA name will be
displayed. All channels will now be open for
normal transmission and reception.
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PAGE 16 INSTRUCTION MANUAL TX4600
If you wish to respond to the calling radio using
Selcall, press and hold the call button for 1.5
seconds until the radio beeps. The callers Ident
will be transmitted back to them causing the
alarm in their radio to be activated.
To cancel the alarm on your radio
Briefly press the PTT.
To return your radio to the QUIET mode
Briefly press the F(Function) key followed by the
QUIET key. ‘QUIET’ will re-appear on the display.
SCANNING IN THE QUIET MODE
The TX4600 will allow you to scan while the
QUIET mode is active. Using this feature you
can monitor a group of Quiet channels or a
combination of Quiet and Open channels.
TO SCAN IN THE QUIET MODE
1. Preselect the Group Scan mode (see MENU
settings).
2. Select the channels you wish to scan and
store them in the Scan memory.
3. From those channels, select the ones you wish
to remain Quiet and tag each one for QUIET
operation.
4. Select a tagged channel and activate the
Quiet Mode (press the Fkey followed by the
QUIET key).
5. Press the SCAN key. The radio will begin
scanning and ‘SCAN’ and ‘QUIET’ will be
displayed, indicating the radio is scanning
in the QUIET mode.
RECEIVING SIGNALS WHILE
SCANNING IN THE QUIET MODE
•Ifanormalsignalisreceivedonanopen
channel, scanning will pause while the channel
is busy and will resume scanning 5 seconds
after the channel becomes clear. (If you were
scanning in Group Scan mode, the radio may
switch between the open channel and the
Priority channel - this is normal).
•IfanormalsignalisreceivedonaQuiet
channel but your SelCall Ident is not detected,
the signal will be ignored and scanning will
continue.
•IfasignalcontainingyourSelCallIdentis
received on any channel - Open or Quiet
– both scanning and QUIET modes will be
cancelled and the receiver will stay on that
channel. In addition, the alarm will beep to
alert you to the call and the callers Ident or
ALPHA Name will be displayed. The channel
will now be open for normal transmission and
reception.
TIP: To ensure reliable SelCall detection when
scanning in the Quiet mode, it is recommended
that you restrict the number of channels in the
Scan group to 4 or less.
GROUP CALLING
The TX4600’s SelCall system includes a Group
Call function which allows you to call up to 1000
radios simultaneously. This can be useful in an
emergency situation where you may need to
transmit a message to a large number of radios
in your group.
By default, your radio is factory-set to allow up to
10 radios to be called at once. If your application
requires more, you can arrange for your Dealer
to re-program this option to allow 100 or 1000
radios to be called. The following description
assumes the default Group Call setting of
10 radios.
The Group Call function works by allowing you
to enter a special ‘group code’ into the last digit
position of the SelCall Ident you are sending. The
‘group code’ appears as an ‘A’ when displayed in
the radio. When this ‘group code’ is received, it
substitutes for all other numbers in the last digit
position. As long as the first 4 digits of the SelCall
you are sending match those of the radios you are
calling, their SelCall alarm will be activated as if
their full 5 digit SelCall Idents had been received.
To achieve this, the 10 radios you are calling
must be programmed with sequentially numbered
SelCall Idents.
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TX4600 INSTRUCTION MANUAL PAGE 17
eg. 12330, 12331, 12332, 12333 . . --> , 12339
•TransmittingtheSelCallIdent12031willonly
activate the alarm in the radio with the SelCall
Ident of 12331.
•Transmitting1233Awillactivatethealarmsin
all radios with Idents 12330 through 12339
(a total of 10 radios).
If the radios in your fleet do not have sequentially
numbered SelCall Idents and you want to make
use of this function, you can arrange for your
Dealer to re-program the SelCall Idents in your
radios.
PROGRAMMING AND SENDING
GROUP CALLS
The process for entering a Group call Ident is the
same as entering a normal SelCall Ident.
1. Press the CALL button. ‘CALL TO’ is displayed,
along with the last sent or received SelCall
Ident.
2. Enter the required SelCall Ident as follows:
(a) Press and hold the F(Function) key until
the radio beeps. The right-hand digit of
the SelCall Ident will flash.
(b) Press the or keys to select ‘A’ in the
flashing digit position. This is the special
code that will create the Group Call.
(c) Briefly press the F(Function) key again to
select the next digit position.
(d) Repeat steps (b) and (c) to enter the other
4 digits as required. The last digit will be
set to ‘A’.
Once the Ident has been entered you have 10
seconds to send it otherwise the CALL TO mode
will be cancelled and the Ident you entered will
be lost.
NOTE: Where your TX4600 allows it,
programming group calls for 100 radios is
identical except that you will need to select ‘A’ for
the last two digits (e.g. 123AA). For 1000 radios
you will need to select ‘A’ for last three digits
(eg: 12AAA).
eg:
100 Radios Ident Sent: 123AA
Idents called: 12300 -> 12399
1000 RadiosIdent Sent: 12AAA
Idents called: 12000 -> 12999
To send the SelCall Ident
With the required SelCall Ident displayed in the
CALL TO mode, press and hold the CALL button
for a few seconds until the radio beeps. The
SelCall Ident will be sent automatically and the
radio will return to normal operation.
Call acknowledge in Group Mode
There is no call acknowledge when sending
group calls. This is to prevent all the radios in
your group from trying to respond to your SelCall
transmission at the same time.
Storing Group Call Idents
Group Call Idents can be stored in memory in the
same way as a standard SelCall Ident.
Receiving Group Calls
Receiving a Group call is identical to receiving a
normal SelCall except that the alarm sound is a
LOW tone beep instead of the normal High tone
beep. The Caller’s Ident or ALPHA Name appears
on the display in the usual way.
LISTENING CHANNELS
The TX4600 has provision for adding an
additional 19 user programmable ‘Listening’
frequencies between 403 MHz and 520 MHz.
These channels can be programmed by you using
the front panel keys, making the TX4600 a useful
UHF scanning receiver.
CALL TO
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PAGE 18 INSTRUCTION MANUAL TX4600
SETTING THE FREQUENCY STEP
The extra frequencies can be programmed in
12.5 kHz or 25 kHz steps. The step rate is preset
and can be toggled as follows.
1. Switch the radio OFF.
2. Hold the key while switching the radio ON.
3. 12.5k or 25.0k will be displayed indicating the
select frequency step is 12.5 kHz or 25.0 kHz.
ACTIVATING LISTENING CHANNELS
By default, the Receive–Only channels are
disabled and only the standard 80 UHF CB
channels can be accessed. To make use of
the extra channels you must activate the
programming mode and program frequencies
into the channels you wish to use. Those channels
will then become available.
To activate the programming mode
1. Switch the radio off.
2. Hold the MENU key while switching the radio
ON again.
Using the or keys you will now be able to
select additional channels between 81 and 99.
Once you have enabled and programmed your
additional Listening channels, switch the radio off
to end the programming mode. When you switch
it on again, normal operation will be restored
and any Listening channels you have enabled will
now be available above channel 80.
PROGRAMMING THE FREQUENCIES
Before programming channel frequencies, make
sure the radio is in the NUMERIC mode. If it is in
the ALPHA mode press F(Function) followed by
ALPHA . ‘NUMER’ will be displayed.
To program a frequency into a channel
1. Activate the Programming mode (hold MENU
then switch ON).
2. Press the or keys to select the required
channel number (81 – 99).
3. Press and hold the MENU key until the
radio beeps. If the channel has never been
activated, ‘OFF’ will be displayed, otherwise a
frequency will be displayed.
4. Press the or keys to adjust the flashing
digit value.
5. Press the CALL button to advance to the
next digit.
•Advancingabove9orbelow0causesthe
adjacent digit to change accordingly.
•Thedisplayonlyindicatesto10kHz
resolution. The kHz digit is not displayed.
eg. 468.425 MHz will display as:
•Whileyouareselectingthefrequency,the
receiver is live and will receive signals on the
frequency being displayed. You can use this
feature to manually identify active frequencies
and store them.
6. Once you have the correct frequency
displayed, press and hold the MENU key to
store it.
TIP: To remove a listening frequency from a
channel, rotate the channel selector until the
display reads ‘–off–’.
To program additional frequencies
Repeat steps 2 – 6 above.
When you have finished programming your
channels, switch the radio off. When you switch it
on again, normal operation will be restored and
the Listening channels you programmed will now
be available above channel 80.
SETTING ALPHA LABELS FOR YOUR
LISTENING CHANNELS.
Your extra listening channels can be set to
display either the channel Frequency or a
meaningful label that you choose. Please refer to
the Frequency/ALPHA Adjustment function in the
MENU settings on page 21.
46842
12.5 / 25 kHz
100 kHz
1 MHz
10 MHz
100 MHz
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TX4600 INSTRUCTION MANUAL PAGE 19
SEEK MODE
The Seek mode is a unique feature that allows
you to continuously scan a band of frequencies
between 403 MHz and 520 MHz for activity.
Once the radio has reached the upper limit of
520 MHz it will resume scanning from 403 MHz
again. If you find an active frequency you can
assign it to a Listening Channel. This feature
makes it easier to locate active channels when
you aren’t sure of the exact frequency you want
to listen to.
ENABLING THE SEEK MODE
NOTE: Before using the Seek mode you should:
1. Preselect your preferred frequency step (12.5
kHz or 25 kHz).
2. Enable the Listening channel numbers that
you wish to store active frequencies into.
You cannot use Seek mode unless at least
1 channel is enabled.
3. Select the Numeric mode so that the
frequency can be displayed (rather than the
ALPHA label).
To enable the Seek mode
1. Switch the radio OFF.
2. Hold the SCAN key while switching the radio
ON again. ‘SEEK’ will be displayed for a few
seconds. The radio is now in Seek mode.
NOTE: When you have finished using the Seek
mode simply switch the radio off. When you
switch it on again, normal operation will be
restored.
SCANNING FOR ACTIVE
FREQUENCIES IN THE SEEK MODE
To scan for active frequencies and store
them into a listening channel:
1. Select the required Listening channel (81 –
99). The frequency currently selected for that
channel will be displayed.
2. Briefly press the SCAN key. The radio will
begin scanning the frequency band starting
from the selected frequency. The channel
number will remain constant (because the
radio is scanning frequencies not channels)
but the frequency will change as the scan
advances through the band.
3. To change the scanning direction press the
or keys. Press key to scan upwards in
frequency or key to scan downwards.
4. When a signal is found, scanning will pause
on that frequency. Once the signal has gone
and the frequency remains clear for 5 seconds,
scanning will resume.
5. To manually skip over an active frequency and
continue scanning, press the CALL button. To
continue scanning in a specific direction or to
change the direction, press the appropriate
or key.
6. When you find a frequency you wish to store,
press and hold the SCAN key until the radio
beeps. The frequency will be stored under the
selected Listening channel number.
To store active frequencies into other Listening
channels repeat steps 1 – 6 above.
SETTING SEEK MODE FREQUENCY
LIMITS
When in Seek mode, the default frequency
range is the entire Listening band of 403 - 520
MHz. However, in many cases you may only be
interested in a searching for signals within a
small section of the available frequency band. To
make searching easier the TX4600 allows you to
set upper and lower frequency limits. The Seek
function will then search only within those limits.
This limits the scan to the area you are most
interested in, thereby increasing the chance of
finding an active frequency within that band.
To scan within frequency limits
1. Select the required Listening channel (81 –
99). The frequency currently selected for that
channel will be displayed.
2. Hold the MENU key until the radio beeps. The
radio will enter the Frequency Edit mode.
3. Select the LOWER frequency limit using the
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PAGE 20 INSTRUCTION MANUAL TX4600
CALL button to select the flashing digit
position and the or keys to change the
frequency value.
4. When the LOWER frequency limit has been
selected, briefly press the SCAN key then
press and hold the key. The radio will give a
long beep. The LOWER limit is now stored.
5. Now select the UPPER frequency limit using
the CALL button to select the flashing digit
position and the or keys to change the
frequency value.
6. When the UPPER frequency limit has been
selected, briefly press the SCAN key then
press and hold the key. The radio will give
a long beep. The UPPER limit is now stored.
7. Press and hold MENU to exit the frequency
edit mode. Now follow the same steps
as described under ‘Scanning for active
frequencies in the Seek Mode’ on page 19.
The only difference will be smaller frequency
band which will now scan only within the
frequency limits set above.
NOTE: The Seek frequency limits will remain
stored in the radio even after you have switched
the radio OFF. The next time you use the Seek
mode the same frequency limits will apply. To
change the frequency limits simply reset them as
described above.
TIP: The Lower frequency limit should normally
be lower than the upper frequency limit.
However, if you should enter a lower frequency
limit that is higher than the upper frequency limit
the radio will then scan frequencies OUTSIDE
these limits. In other words you can exclude the
frequencies between the limits.
If Upper Limit is greater than Lower Limit, radio
will scan INSIDE the limit range.
If Upper Limit is less than Lower Limit, radio will
scan OUTSIDE the limit range.
MENU SETTINGS
OVERVIEW
The MENU feature provides a convenient
method of customizing or storing some of the
radio’s functions. The following Menu Options are
available. Note that some items are only available
on certain channels.
To access the Menu functions
1. Press and hold the MENU key. The first
MENU function is displayed.
2. Briefly press the MENU key again to cycle
through each available function in the order
listed above. After the last function has been
selected, the cycle returns to the beginning.
3. Press the or keys to alter the parameters
of the selected function.
4. Press and hold the MENU key to exit and
store any changes.
520403
MHz
Lower
Limit
Upper
Limit
Lower
Limit
520403
MHz
Upper
Limit
Menu Settings Ch 1-8
Ch 41-48
Ch 9-40
Ch 49-80
RX Only
Ch
Frequency/
ALPHA Adjustment •
Squelch Settings •••
Open/Group Scan •••
Duplex/Simplex
Mode •
CTCSS Tones •••
Lamp Colour •••
Battery/S-Meter
Selection • •
Battery/S-Meter
ALPHA Selection •
LCD Contrast •••
Beep Tone Level •••
42333-8_TX4600 IM.indd 20
28/08/13 11:21 AM
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