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t X 4 5 0 0  

I n s t r u c t I o n   m A n uA l  

PA G E   1 3

mode is enabled.

2.   Briefly press and hold the 

Silent

 key. A low beep 

will be heard and the   (ctcss) or 

 (Dcs) icon 

will disappear to indicate  silent mode has been 
removed from that channel.

IMPORTANT:

 

When silent mode is enabled on a 

channel you should always check the   icon for signs 
of traffic on the channel before transmitting to ensure 
you do not accidentally transmit over the

 

top of another 

user. Alternatively, you

 

can enable 

Busy Lockout

 in 

the 

Configuration Menu 

which will automatically 

prevent your radio from transmitting if the channel is 
already in use.

Monitor function

When the current channel is in silent mode, the   icon 
may appear but no sound will be heard in the speaker. 
this indicates that your radio is receiving a signal that 
does not match your ctcss/Dcs tone. If you wish, you 
can briefly monitor the channel as described below. this 
temporarily disables silent mode, allowing the signal 
to be heard.

to monitor signals on the channel, press and hold the 

Squelch

 knob. When you release the 

Squelch 

knob, 

silent mode is restored and the radio will become  
quiet again.

SELECTIVE CaLLING

Overview

Your radio 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 
radio 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. Your radio will then remain 
quiet to all incoming signals until your selcall number 
is called.

Your radio will allow you to store up to ten of your most 
frequently called selcall numbers in memory and each 
number can be labelled for easy identification.

Selcall identification number

Your radio 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 to the left of 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.  

NOTE: 

Although your radio is factory-programmed with 

a unique selcall Ident, you can change your Ident to 
another number if required (see 

Selcall Memories

 on 

next page).

Selcall Ident labels

When storing selcall Idents, you can add labels to each 
one to make it easier to identify whose Ident you are 
recalling. In addition, if an incoming selcall matches 
one of your stored Idents, the label can be displayed 
instead of the Ident.

to add or display labels, your radio must be in the 
AlPHA mode. to switch between AlPHA mode and 
numErIc mode, briefly press the 

F

 key followed by the

 

ALPHA

 key. ‘AlPHA’ or ‘numBEr’ will be displayed 

briefly to the left of the channel display to indicate the 
selected mode.

The Quiet Mode

Your radio 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 your selcall Ident is received, 
the Quiet mode is deactivated and an alarm sounds to 
alert you to the call. You can then converse normally on 
the channel. 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   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 
i.e. some channels can be set to remain Quiet while 
others can remain open to all incoming signals.

USING SELCaLL

Entering a Selcall Ident

1.   Press the 

CALL

 button. 

 is displayed, along 

with the last sent or received selcall Ident. If an 

AlPHA label 

is displayed you will need to press 

F

 

then 

ALPHA

 to switch to numeric mode.

2.   Press and hold the 

Channel 

knob until the radio 

beeps. the right-hand digit of the selcall Ident  
will flash.

3.   rotate the 

Channel 

knob to select the required 

number in the flashing digit position.

4.   Briefly press the 

Channel 

knob again to select the 

next digit position.

Summary of Contents for TX4500

Page 1: ...I N S T R U C T I O N M A N U A L DIN size fully featured 5 watt UHF CB radio...

Page 2: ...ighting 7 Bandwidth Filter Settings 7 Dynamic Volume Control 8 Voice Scrambler 8 Repeaters and Duplex Mode 8 Priority Channel 9 Scanning 9 CTCSS DCS 11 Selective Calling 13 Using Selcall 13 Quiet Mode...

Page 3: ...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...

Page 4: ...ur voice so that communications are only intelligible to others using the same scrambler technology Programmable Scan Function Scans the selected UHF CB channels with both Group and Open Scan function...

Page 5: ...iority 1 Priority 2 Duplex Alpha Silent Quiet Front Mic Socket SILENT QUIET DUP ALPHA VOLUME SQUELCH CHANNEL PRI 1 PRI 2 SCAN OS GS MENU F LCD PANEL Scan Quiet Busy Transmit Channel Display Selcall Al...

Page 6: ...quelch can be opened or closed using the Squelch knob When the Squelch is open the receiver s background noise can be heard and the symbol is displayed When the Squelch is closed the receiver remains...

Page 7: ...the available settings Rotate the Channel knob left or right to adjust the current setting There are three backlight settings available BKLGT Brightness Setting Provides a continuously variable bright...

Page 8: ...eeps 2 Briefly press the Menu key repeatedly until ENCOF or ENCON is displayed 3 Rotate the Channel knob to make your selection Select ENCON to activate the scrambler encoder or ENCOF to disable it 4...

Page 9: ...is feature can be used to provide instant access to your working channel or your local repeater channel at the press of a key It can also be used in conjunction with the Group Scan function Your TX450...

Page 10: ...is mode press the F key again or wait 10 seconds for the function to time out This option can be used to quickly jump between channels of interest or to quickly review which channels are in the Scan m...

Page 11: ...d your conversation and there has been no further activity for 5 seconds the radio will resume scanning the other channels If the scan pauses on a busy channel and you don t wish to listen to that con...

Page 12: ...or 50 to access the DCS tones DCS tones are displayed as DT001 DT104 Rotate left CTCSS Off CTCSS Tone 50 DCS Tone 104 Rotate right 5 To see the actual sub tone instead of the tone label briefly press...

Page 13: ...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 NOTE Although your radio is factory programmed with a unique Se...

Page 14: ...t the required number in the flashing digit position 5 Briefly press the Channel knob again to select the next digit position 6 Repeat steps 4 and 5 to enter all 5 digits as required 7 Now press and h...

Page 15: ...the PTT switch The alarm will be cancelled and the channel will be open for normal communication You can now talk on the channel in the usual way Quiet Mode The Quiet Mode mutes the receiver to preve...

Page 16: ...mal signal is received on an open channel scanning will pause while the channel is busy and will resume scanning 5 seconds after the channel becomes clear If you were scanning in Group Scan mode the r...

Page 17: ...lcalls to every tenth radio by setting the second digit to A e g Sending Ident 145A5 will call radios 14505 14515 14525 14535 14545 14595 Call acknowledge in Group mode There is no call acknowledge wh...

Page 18: ...is 25 kHz You should select a frequency step that matches the channel allocations in the frequency band you are programming When selecting 25 kHz or 12 5 kHz steps the appropriate wideband or narrow...

Page 19: ...he channel number You can configure the display to show the Frequency or the Alpha name of the selected channel Before starting ensure the radio is in the Numeric mode press F then ALPHA so that NUMER...

Page 20: ...e Scrambler Enables or disables the Voice Scrambler Scrambler Encoder ON Scrambler Encoder Off Beep tone level Adjusts the volume level of the beep tones associated with key presses Beep level 9 Beep...

Page 21: ...only channel memory consists of 5 banks of 19 channels Channel banks are labelled RX A to RX E CH Bank C CH Bank B CH Bank A CH Bank E CH Bank D INSTALLATION Your TX4500 is supplied with a DIN mounti...

Page 22: ...negative terminal Connect the radio s positive Red lead via the 2 amp fuse to the accessory point in the fuse box This point should supply 13 8 volts ONLY when the ignition is switched ON or in the A...

Page 23: ...he radio has a built in high voltage detection system to warn you if an overvoltage situation occurs If the power supply voltage exceeds 18 volts DC the channel display will flash hi dc for 5 seconds...

Page 24: ...5 35 225 7 12 11 97 4 29 165 5 46 229 1 13 12 100 0 30 27 167 9 47 36 233 6 14 13 103 5 31 171 3 48 37 241 8 15 14 107 2 32 28 173 8 49 38 250 3 16 15 110 9 33 177 3 50 254 1 17 16 114 8 34 29 179 9 D...

Page 25: ...0 46 476 5625 66 477 0625 7 476 575 27 477 075 47 476 5875 67 477 0875 8 476 600 28 477 100 48 476 6125 68 477 1125 9 476 625 29 477 125 49 476 6375 69 477 1375 10 476 650 30 477 150 50 476 6625 70 47...

Page 26: ...quency Error 1 5 kHz Modulation FM Maximum Deviation 2 5 kHz at 20 dB AF limiting Transmit Frequency Response 6 dB per octave 300 Hz to 3 kHz 1 3 dB Demodulated Audio Signal to Noise 45 dB unweighted...

Page 27: ...rvices supplied again 2 4 For repairs outside the warranty period we warrant our repairs to be free from defects in materials and workmanship for three months from the date of the original repair We a...

Page 28: ...op Dunn Pl Dandenong South Thebarton 10 12 Harvard Way 89 101 Factory Rd 22 24 College St East Tamaki VIC 3165 SA 5031 Canning Vale Oxley Gladesville Manukau 2013 T 03 9798 0988 T 08 8234 2633 WA 6155...

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