Oricom DTX4300 User manual

Keep this user guide for future reference. Always retain your proof of purchase in case of
Warranty service and register your product on line at:
AUSTRALIA: www.oricom.com.au NEW ZEALAND: www.oricom.co.nz
Operating Instructions
DTX4300 80 Channel UHF Citizen Band Radio

This unit complies with all relevant Australian
and New Zealand approval requirements
AS/NZS 4365:2011
Why has the ACMA increased the number of available UHF CB channels?
To provide additional channel capacity within the UHF CB Band the ACMA will over the next 5 years change the
majority of the current wideband 40 channel use to narrowband 80 channel use.
During this time wideband channel use will be gradually phased out as users upgrade their existing radio’s.
This means that the new Oricom narrowband radio you have purchased will have more channels than older wideband
radios. Some of these channels are locked and cannot be used, (see the attached channel chart for more information).
When did this take place?
Early in 2011 new AS/NZS Standards came into effect allowing operators to use additional narrowband channels and
also use narrowband transmissions on some current wideband channels. This increased the number of channels up
to 80, 75 of which are useable voice channels.
What issues may users experience during the transition phase?
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 the best listening performance. When an older wideband radio
receives a signal from a new narrowband radio the speech may sound quieter - simply adjust your radio volume for
best listening performance. When operating a narrowband radio or Channel 41 - 80 interference is possible from
wideband radios transmitting on high power or on adjacent frequency.
The issues described above are not a fault of the radio but a consequence of mixed use of wideband and narrowband
radios.
It is expected that as older wideband radios are removed from service that this issue will be resolved. Most radios in
use will be narrowband eliminating this issue.
This information is current at time of printing. For further up to date information please visit
www.acma.gov.au

3
Table of contents ..........................................................................3
Controls and Indicators .................................................................4
Important information ...................................................................7
Installation of your Oricom Radio...................................................8
Operations..................................................................................10
UHF CB channels and frequencies ..............................................23
Customer Support.......................................................................26
Express Warranty (Australia) .......................................................27
Need Help?
If you need assistance setting up or using your Oricom product now or in
the future, call Oricom Support.
Australia 1300 889 785 or [phone]
www.oricom.com.au
Mon-Fri 8am – 6pm AEST
New Zealand 0800 67 42 66
www.oricom.co.nz
Mon-Fri 10am – 8pm NZST
Table of contents

4
Controls and Indicators
Controls and Indicators
Front View
1
2
3
4
5 67
1. Microphone connector
2. Open Scan/Priority Scan
3. Memory Scan/Group Tone Scan
4. Memory recall/Memory write
5. Remove memory/Menu
6. Volume/Channel/Squelch
7. LCD display

5
Controls and Indicators
Rear View
2
1 3
1. Antenna Connection
2. Power supply connection
3. 3.5mm external jack for optional 8 ohm speaker
Microphone
1. Push to talk
2. Volume/Channel/SQ down
3. Mode On/off switch
4. Volume/Channel/SQ up
24
3
1

6
Controls and Indicators
LCD Icons & Indicators
12435
789
6
1. Channel display 6. Priority
2. CTCSS or DCS on 7. Memory Group number
3. Duplex On 8. Memory Group I II or III
4. Channel busy indicator 9. Status display
5. Signal strength & TX

7
Important information
Please read before installing or operating your
Oricom Radio
The operation of your UHF radio in Australia and New Zealand is subject
to conditions in the following licenses:
In Australia the ACMA Radio communications (Citizen Band Radio
Stations) and in New Zealand by MED the General User Radio License
for Citizen Band Radio.
Safety Information and Warnings
WARNING
Potentially Explosive Atmospheres
Turn your radio OFF when in any area with a potentially
explosive atmosphere. Sparks in such areas could cause an
explosion or re resulting in injury or even death.
NOTE: Areas with potentially explosive atmospheres are often,
but not always clearly marked. They include fueling areas such
as below deck on boats; fuel or chemical transfer or storage
facilities; areas where the air contains chemicals or particles,
such as grain, dust, or metal powders; and any other area where
you would normally be advised to turn off your vehicle engine.
Blasting Caps and Areas
To avoid possible interference with blasting operations, turn
your radio OFF near electrical blasting caps or in a "blasting
area" or in areas posted: "Turn off two way radios." Obey all
signs and instructions.
Electromagnetic Interference/Compatibility
Nearly every electronic device is susceptible to electromagnetic
interference (EMI). To avoid the possibility of electromagnetic
interference and/or compatibility conicts, turn off your radio
in any location where posted notices instruct you to do so such
as health care facilities.

8
Installation of your Oricom Radio
CAUTION
When installing your radio in your vehicle, check that
during installation you do not damage any wiring or vehicle
components that may be hidden around the mounting position.
Ensure the installation does not interfere with the operation of
the vehicle and meets all regulatory and safety retirements for
accessories tted to your vehicle.
For optimum performance your radio needs to be installed
correctly. If you are unsure about how to install your radio, we
suggest you have your radio professionally installed by a UHF
specialist or Auto electrician. When installing the radio, avoid
mounting it close to heaters or air conditioners. Never press
the PTT or CALL button before connecting the antenna to the
radio.
Wiring Methods
There are two possible wiring congurations for connecting to the
Vehicles power supply.
A. Radio stays ON when the ignition is switched OFF
Connect the radio's negative (black) lead to the vehicle chassis, or
directly to the batteries negative terminal.
Connect the radio's positive (red) lead via the 2 Amp fuse to the
battery's positive terminal. Alternatively, the positive lead could be
connected at the fuse box at a point that has DC Power continuously
available (preferably the battery side of the ignition switch) via the 2
Amp fuse.
B. Radio turns OFF with the ignition switch
Connect the radio's negative (black) lead to the vehicle's chassis, or
directly to the batteries negative terminal.

9
Installation of your Oricom Radio
The radio's positive (red) lead should connect to an accessory point in
the vehicle's fuse box via the 2 Amp fuse.
Antenna information
The antenna (not supplied) is of critical importance, to maximize your
output power and receiver senstivity.
A poorly installed, inferior quality antenna or one not designed for the
correct frequency band will give poor performance. You should only
purchase an antenna designed for the 477MHz frequency band.
Antenna installation
1. Connect the antenna to the rear antenna socket using a PL259 coaxial
connector (not supplied).
2. To obtain maximum performance from the radio, select a high quality
antenna and mount it in a good location. Never press the PTT or
CALL button before connecting the antenna to the radio.
Optional accessories
If required you may install an external (8 ohm, max 5w power) speaker
tted with a 3.5mm plug (not supplied).
Depending on the installation it may be necessary to use an external
speaker (not supplied) to give improved volume and clarity. This can be
plugged into the external speaker (SP) socket on the rear of the unit.

10
Operations
Operations
Turning on the Power
Press and hold the Channel selector.
Setting the Volume
Turn the channel selector clockwise to adjust the sound level for
comfortable reception.
On the microphone push the up or down buttons to increase or decrease
the volume. If held down the volume will increase or decrease quickly.
Selecting a channel
Press channel selector once. "CH" will appear on the LCD.
Select the channel by rotating the channel knob.
On the microphone push the mode button and select the channel using
the up or down buttons.

11
Operations
Setting the Squelch Level
1. Press channel selector 2 times. The current squelch level is
displayed.
2. Select the squelch level by rotating the channel knob.
The radio has 16 preset (off to 15) squelch level off- Squelch open.
1 - Max sensitivity (Min. squelch)
15 - Min. sensitivity (Max/Tight squelch)
On the microphone push the mode button 2 times and adjust Squelch
with the up and down buttons.
Note :
*If a button is not pressed within 5 seconds the radio will
automatically exit the sub display of "VOL" "CH" and "SQL".
PTT (Push-To-Talk) button
Pressing the PTT allows audio to be transmitted, by speaking across the
front of the microphone. TX is indicated by the level bars on the LCD
display.
To receive, release the PTT button and then TX will disappear on the
display.
When transmitting, hold the MIC two inches from your mouth and
speak clearly in a normal voice across the front of the mic.

12
Operations
Scanning
The Scan feature allows you to search for active channels automatically.
There are 4 scanning modes;
Open Scan, Priority Scan, Memory Group Scan and Group tone Scan
(a special case of Memory Group Scan).
Open Scan
Press and scanning starts. The OS-SC sub menu display appears on
the LCD.
To stop Scanning, press button or PTT press.
When a signal is found, scanning will stop at that
channel to allow the signal to be heard, then resume
scanning when the channel is clear again.
The scan resume time can be set as an optional pause of P5 (default).
ch 1-2-3-4-5-6-7 ….. 77-78-79-80
Priority Scan
Priority Scan scans 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 signal received on your Priority Channel
will take precedence over any signals received on the
other channels.
ch 1-2-3-4-5- PRI CH - 6-7-8-9-10- PRI CH ….. 76-77-78-79-80
Press and hold for 2 seconds and scanning starts.
The PS-SC sub menu display will appear on the LCD.
To stop Priority Scan, press and hold button or press PTT.

13
Operations
Group Memory Scan
Memory scan must be stored to the memory channels in groups I to III.
Refer to memory recall function.
1. Press button to change the setting between I,II,III and I blinking in
I II III.
The I II III means all memory groups will be selected for scanning.
2. Press button to start group scan.
The ME-SC sub menu display
appears on the LCD.
3. To stop Group memory Scan,
press button or press
PTT.
Group Tone Scan
Group Tone Scan is a scan mode which allows continual communication
across congested channels.
Group Tone Scan channels are stored into Group memory scan and
only opens the squelch for signals with the correct sub code (38CTCSS
or 104 DCS tone).
To achieve this, all radios in your group memory must have the same
channels in I II III memory (group memory channels) and use the same
Subcode (CTCSS or DCS).
1. Press button to change the setting between I II III and I blinking in
I II III.
The I II III means all groups will be included in the scan.
2. Press button for 2 seconds to start group scan.
The GT-SC sub menu display
appears on the LCD.
3. To Stop Group Tone Scan,
press button or press PTT.

14
Operations
Memory Recall
This feature allows the user to recall the stored channels in the memory.
To access channels in the Memory, simply press the "MR" button, and
the "I" will appear at the right side on the LCD. Press the memory button
you want to access from I to III Group.
To select memory channel
1. press button repeatedly until I is ashing.
2. push channel selector knob to select channel
operation rotate channel selector knob to select
memory location, Group indicator will ash to
indicate which group is selected.
The DTX4300 has 48 stored channels as below.
CH/Group Group I Group II Group III
09 25 –
1 10 26 –
2 11 27 –
3 – – –
4 – – –
5 – – –
6 – – –
7 – – –
8 – – –
9 – – –
A – – –
B – – –
C – – –
D – – –
E – – –
F – – –
Each memory channel can be programmed with any CTCSS or DCS sub
code.
To change group selected in
all scan mode, press to
change between I II III.
1. Press button to change
the setting between I
ashing in I II III.
2. Press channel selector to
CH mode Select the channel
by rotating the channel dial
up or channel down to 0 - F.
More than F selected and
automatically change of
display from I blinking to
II blinking.
It is change of start band in
All scan mode(I II III).

15
Operations
Memory Write
Select the channel you want to store.
For this example we want to save channel 09 to II
group and group channel 8.
1. Press button for 2 seconds. Group I location 1
will blink.
2. Press button to change to group II.
3. Press channel selector to change to CH mode.
4. Rotate channel selector until location 8 is selected.
5. Press button for 2 seconds to save & exit from memory write.
Remove Memory in Scanning
While the radio stops scanning on a busy channel,
press and hold button for 2 seconds.
Channel will be removed from current scanning. The
removed channel will be reinstated after the scan is
stopped and restarted.
Scan 1-2-3-4-5-6-7 ….. 77-78-79-80
RM Scan 1-3-4-5-6-7 ….. 77-78-79-80
Note: Up to 10 channels can be removed for the current scan.
For this example we are removing CH02 during the scan. Because it is
only noise.
1. Press button for 2 seconds.
2. Scanning will resume.
3. Channel 02 is removed during scan.

16
Operations
Menu list
The menu feature provides a convenient method of customising some of the
radios functions. The following menu options are available. Note that some
items are only available on certain channels.
1. Press the button for 2 seconds. The rst menu function is
displayed.
2. Press the button to cycle through each available function.
3. Rotate the channel knob to alter the parameters of the selected function.
* Use the channel dial to change the value of each setting.
* If a button is not pressed within 8 seconds the radio will
automatically exit the menu mode.
* Exit menu mode by pressing PTT.
* Please see below menu modes.
Function Step Display Default
Duplex On/Off
Off
On
On
CTCSS and DCS
Off
Offto
104
Backlight LED
colour
0
64(Green)to
95
Brightness of
backlight
1
2to
4
PRI Setting
channel
1
11to
80

17
Operations
Function Step Display Default
Key Beep
Off
Off
On
Busy channel
lock
Off
Off
On
Scan resume
time
p5
P5to
5,10,15
Auto power Off
Off
Offto
1H,2H,4H
Group Tone
Scan
CT1(67Hz)
On
Off
Reset
User
User
Factory
Flip Top UP
Bottom UP Top UP
Logo Display
On
On
Off
Software Version Ver 01

18
Operations
Duplex
General
Your radio has a Repeater Access function to allow use of local repeater
station (if available in your area). Repeater are shared radio system
installed by interested parties (clubs, local business etc.) that pick
transmissions on specic channels and re-transmit (or repeat) the
received signal to another channel.
Channel 2
Channel 32
Channel 2
Channel 32
Repeater Station
The Repeater Access function can be set (from channel 1 to 8 and 41
- 48) used by local repeater stations. When activated, your radio will
receive the Repeater on its specic channel (all repeater output are on
channel 1 to 8 and 41 to 48) but transmit to the repeater channel 31
through 38 and 71 to 78.
(Factory default is set to On for all repeater channels).
e.g.
CH01 on Duplex mode will receive on CH01 but transmit on CH31.
CH02 on Duplex mode will receive on CH02 but transmit on CH32.
If you transmit on CH01 Duplex mode, you are actually transmitting on
CH31.
The repeater station down converts your signal and retransmits on
CH01.
Your transceiver allows you to pre-select Duplex operation individually
on each channel.

19
Operations
CH and
Number
Simplex mode Transmit/Receiver Duplex Mode transmit/Receiver
Frequency (MHz) Frequency (MHz)
1 476.425 477.175 CH31
2 476.450 477.200 CH32
3 476.475 477.225 CH33
4 476.500 477.250 CH34
5 476.525 477.275 CH35
6 476.550 477.300 CH36
7 476.575 477.325 CH37
8 476.600 477.350 CH38
41 476.4375 477.1875 CH71
42 476.4625 477.2125 CH72
43 476.4875 477.2375 CH73
44 476.5125 477.2625 CH74
45 467.5375 477.2875 CH75
46 476.5625 477.3125 CH76
47 476.5875 477.3375 CH77
48 476.6125 477.3625 CH78
For this example we are adopting CH01 as the channel being used for
repeater use.
1. Press Menu button. The duplex setting.
2. Turn the channel selector to change the setting between ON or OFF.
3. Press PTT to save & exit from the menu mode.
4. R icon displays when a selected channel is set to Duplex mode.

20
Operations
CTCSS and DCS setting
This feature allows you to receive signals only from callers who have
selected the same CTCSS and DCS code.
DCS is similar to CTCSS. It provides 104 extra, digitally coded, squelch
codes that follow after the 38 CTCSS codes. CTCSS 1 - 38, followed by
DCS 1 - 104.
Please refer to the table of CTCSS and DCS.
CTCSS and DCS is not available on CH05 and CH35. For your reference
a list of the available channels, corresponding frequencies and
guidelines for their use and selection is CTCSS and DCS channel list.
For Australia, channel 05 and 35 are reserved for Emergency calls.
96 multi-colour Backlight
You can select from 96 different multi-colour backlighting for the LCD
backlight.
LCD backlight brightness
You can reduce the brightness of the LCD backlight to be more
comfortable while driving at night.
Priority Channel setting
The channel you selected as your Priority Channel will the be automati-
cally monitored during the Priority Scan.
Note: You can only store one channel as your priority channel.
Key Beep
The Beep tone emits a tone when you press any of the buttons on the
microphone (except PTT button).
Busy channel Lock
If the channel is already in use, you can prevent the UHF CB radio from
transmitting. This is particularly important when using CTCSS/DCS.