Uniden UH720SX-NB User manual

UH720SX-NB
UH720SX-2NB
UH710SX-NB
UH710SX-2NB
UHF CB Radio
For more exciting new products please visit our website:
Australia: www.uniden.com.au
New Zealand: www.uniden.co.nz

NOTE
The citizen band radio service is licenced in Australia by ACMA
Radio-communications (Citizen Band Radio Stations) Class
Licence and in New Zealand by MED General User Licence
for Citizen Band Radio and operation is subject to conditions
contained in those licenses.
NOTE
It is illegal to operate this radio transceiver outside of Australia
and New Zealand.
NOTE
Do not plug in any AC Adapter plug into the EXT. SPKR/MIC
(SM-065) phone jack.
2
Warning
UNIDEN UH720SX-NB/UH710SX-NB UHF CB Radio

Introduction
Features 4
Controls & Indicators 5
Included in Your UH710SX-NB/UH720SX-NB Pack 7
Getting Started
Battery Installation 8
Belt Clip 8
Charging Batteries Using the Desktop Charger 9
Charging Batteries Using the Cigarette Lead Charger 9
Battery Life 9
Battery Level Display 10
Low Battery Alert 11
Operation
Power On/Off 12
Volume 12
Setting the Squelch 12
Selecting a Channel 13
To Transmit and Receive 13
To Operate in Duplex Mode (Repeaters 14
Transmit Power Select 15
Scanning 15
Open Scan (OS) Mode 16
Group Scan(GS) Mode 17
Priority Channel Watch During Group Scan 18
Programming Scan Channels 18
Drop-Out Delay 18
Programming the Instant Priority Channel 19
Recalling the Instant Channel 19
Dual Watch 19
Monitor 19
CTCSS 20
DCS 20
VOX 21
Room Monitor 21
Busy Channel Lockout 22
Call Tone 23
Roger Beep 23
Key Beep 23
Battery Save 24
Keypad Lock 24
Back Lighting 24
CTCSS Codes and Frequencies 25
DSC Codes Table 26
UHF-CB Channel Guidelines 27
UHF-CB Channels and Frequencies 28
Warranty 31
3
Contents
UHF CB RadioUNIDEN UH720SX-NB/UH710SX-NB

4
Introduction
UNIDEN UH720SX-NB/UH710SX-NB UHF CB Radio
The UH710SX-NB/UH720SX-NB UHF CB radio is compact, rugged and ts
easily in your hand. This hand held UHF-CB radio will give you consistent,
outstanding performance in virtually all conditions and situations. To ensure
that you get the most from the UH710SX-NB/UH720SX-NB’s features, please
read this operating guide carefully before using the unit.
Features
• Narrow Band (NB) 80 Channel
Radio1
• Communicate with up to 77
Channels in the UHF-CB Band1
• TX output power:
UH710SX-NB - 0.1W / 0.5W / 1.0W
UH720SX-NB - 0.1W / 0.5W / 2.0W
• Up to 10 km+ range2
• LCD display
• Battery level indicator
• Low Battery Alert
• AA Battery Compatible
(Rechargeable or optional Alkaline)
• Battery Power Save On/Off
• Desktop charger
• DC charge jack
• +12V to +24V DC Cigarette lead
charger (optional for UH710SX-NB)
• Channel select
• Backlit LCD and keypad:
UH710SX-NB - orange
UH720SX-NB - white
• Monitor
• Room monitor
• Instant Channel Programming
• One Touch Instant Channel Recall
• Dual watch
• Group Scan with Priority CH Watch
• Open Scan
• OS/GS Scan separately
• Channel Memory
• Selectable scan direction upward
or downward
• Duplex capability
• 5 Level VOX (Voice Activated
Function)
• 5 Level Room Monitor
transmission threshold
• Selectable 3 squelch position
(”1” = threshold, “2” = middle,
“3” = tight)
• Busy CH Lock-Out Function
• 5 different CALL tone
• Roger beep
• Key beep On/ Off
• Keypad lock
• 38 Built in CTCSS (Continuous Tone
Coded Squelch System) codes and
104 DCS (Digital Coded Squelch
System) codes are selectable
• Volume and Power On/OFF
Control Knob
• External Speaker / Microphone
capability
1Refer to p.27 - p.29 for channel
information.
2Range varies depending on the
environment. 10km + range is noted
in a at open environment @ 2W
transmit power. 6km + range is
noted in a at open environment @
1W transmit power.

5
Controls & Indicators
UHF CB RadioUNIDEN UH720SX-NB/UH710SX-NB
1. EXT. SPKR/MIC Jack
2. On/Off Volume Knob
3. LCD Display
4. Cigarette Lead Charger Jack
5. Menu/Enter Button
6. Instant Button
7. Memory On/Off &
DCS/CTCSS Button
8. Microphone
9. Up Button
10. Down Button
11. Speaker
12. Transmit Power
Select/Keylock Button
13. Dual Watch/Monitor Button
14. Scan/Call Tone Transmit Button
15. Belt Clip Catch
16. PTT (Push-to-talk) Button
17. Battery Cover
1 2
3
15
416
514
613
11
712
817
9
10

NOTE
Radio images in this manual show UH720SX-NB, however the
display indicators and keys are the same for the UH710SX-NB.
6
Controls & Indicators
UNIDEN UH720SX-NB/UH710SX-NB UHF CB Radio
A. Memory
B. Transmit
C. Scan
D. Busy
E. Squelch
F. Busy Channel Lockout
G. Dual Watch
H. Battery Level Indicator
I. Transmission Power Level
Indicator (High/Low)
J. Room Monitor
K. Key Lock
L. DCS/CTCSS code
M. DCS/CTCSS Indicator
N. Priority
O. Voice Activation
P. Group Scan
Q. Channel Number

7
Included In Your Package
UHF CB RadioUNIDEN UH720SX-NB/UH710SX-NB
Item UH710SX-
NB
UH710SX-
2NB
UH720SX-
NB
UH720SX-
2NB
Radio 1x
UH710SX-
NB
2x
UH710SX-
NB
1x
UH720SX-
NB
2x
UH720SX-
NB
Rechargeable
Batteries (AA
NIMH)
3x 700mAh 6x 700mAh 3x 1800mAh 6x
1800mAh
Beltclip 1x 2x 1x 2x
Earpiece Mic
(EM-065) 1x 2x 1x 2x
External
Speaker
Mic (SM-065)
- - 1x 2x
Desktop charger 1x single 1x twin 1x single 1x twin
Cigarette lead
charger (CK-720) - - 1x 2x
AC Adaptor
(AAD-065S(M)) 1x 1x 1x 1x
Owner’s Manual 1x 1x 1x 1x
NOTE
If any of these items are missing from the box, contact your
Uniden Dealer.
Optional Accessories
• +12V to +24V DC Cigarette Lead Charger (CK-720)
• Voice Activated (VOX) Headset (VM-041)
• Leather Case (LC-720)
• Commercial Quality Speaker Microphone (SM-060CQ)
• Commercial Quality Air Tube (EM-064CQ)
• Commercial Quality Referee’s Kit (RK-060CQ)
• Commercial Quality Rubber Car Hook (EM-060CQ)

8
Getting Started
UNIDEN UH720SX-NB/UH710SX-NB UHF CB Radio
Battery installation
Your UH710SX-NB/UH720SX-NB pack includes 3 AA rechargeable NiMH
batteries to power the unit. You must install and then charge the batteries for
15 hrs before use. The UH710SX-NB/UH720SX-NB can also use 3 AA Alkaline
batteries.
NOTE
Do not mix old and new batteries to avoid damage to the unit.
To install batteries :
1. Make sure your radio is OFF.
2. Remove the battery compartment door
by pressing down then sliding
the cover away from the radio.
3. Install the batteries to the
battery compartment.
4. Replace the battery
compartment door.
Belt Clip
To attach the belt clip:
Slide the belt clip into the catch until it snaps into place.
To remove the belt clip:
Pinch and hold the belt clip and latch and then slide the belt clip up and out
of the catch.

9
Getting Started
UHF CB RadioUNIDEN UH720SX-NB/UH710SX-NB
Charging Batteries Using The Desktop Charger
1. Connect the AC adaptor to the charging cradle.
2. Place the battery installed unit with keys facing forward onto the charging
cradle to charge the batteries. The charge LED lights to indicate charging.
NOTE
Warning Notice!
Use only the supplied AAD-065S(M)
power adaptor or supplied cigarette
lead adaptor (UH720SX-NB pack only)
if rechargeable batteries will be used in
the radio.
NOTE
Battery charging times vary. A longer
time is required to charge higher
capacity batteries.
Charging Batteries Using The Cigarette Lead Charger
(Supplied with UH720SX-NB packs only)
1. Connect the cigarette lead charger into the DC charge jack of the radio.
2. Connect the adaptor end to a cigarette jack (cigarette lead charger input
voltage: +12V to +24V DC). The charge LED lights to indicate charging.
Rechargeable NiMH Batteries Charging Time
1800mAh 9 hrs
700mAh 4 hrs
Battery Life
Duty cycle: TX 5% - RX 5% - STANDBY 90 %
50hrs typ.(AA SIZE 1800mAh ALKALINE)
50hrs typ.(AA SIZE 1800mAh Ni-MH)
20hrs typ.(AA SIZE 700mAh Ni-MH)
Condition measured:
Volume Level at rated power (50mW @ 16 ohms)
Transmit Level; LO
Standby; Battery Save ON
UH710SX-NB/UH720SX-NB
single charger is shown.

10
Getting Started
UNIDEN UH720SX-NB/UH710SX-NB UHF CB Radio
Battery Level Display
The icon in the upper right hand corner of the screen indicates the
UH710SX-NB/UH720SX-NB current battery voltage level at all times. The
battery level is displayed in 4 levels:
LEVEL 3
Battery 100% full
LEVEL 2
Battery approx
30% capacity
LEVEL 1
Battery approx
15% capacity
LEVEL 0
Almost Empty
NOTE
When [PTT] SW is pressed at Level 0, the PTT Error Tone will
be heard and the channel number and the battery icon will ash.

11
Getting Started
UHF CB RadioUNIDEN UH720SX-NB/UH710SX-NB
Low Battery Alert
The LCD on your radio shows a battery
meter in the upper right hand corner.
icon indicates a fully powered unit.
The Low Battery Alert beep will sound
when the battery level drops to Level 1.
If you continue to use the radio at Level 1 the Low Battery Alert beep will sound
at approximately 15 minutes intervals until the radio is turned off or the batteries
are recharged to a higher level.
If the battery level falls to Level 0 (ashing empty) the LCD display will turn off
after 30sec. An error tone will sound if any key is pressed.
Recharge the NiMH batteries or replace the Alkaline batteries immediately to
continue using the radio.

12
Operation
UNIDEN UH720SX-NB/UH710SX-NB UHF CB Radio
Power On/Off
To turn the unit ON, rotate the
[ON/OFF VOLUME] knob clockwise until
a “click” is heard. A channel number and
battery level should appear on the display.
To turn the unit OFF, rotate the
[ON/OFF VOLUME] knob counter- clockwise
until a “click” is heard to save the battery life.
The display will disappear.
Volume
Rotate the [ON/OFF VOLUME] knob
clockwise to increase the volume,
counter-clockwise to decrease the volume.
Setting The Squelch
The squelch is used to eliminate any annoying background noise when there
are no signals present.
1. Press once.
The current setting will ash.
2. Press or to select desired squelch setting.
SQL-1 : Max sensitivity (Threshold)
SQL-2 : Med sensitivity
SQL-3 : Min sensitivity (Tight)
3. Press and hold to save setting and exit.
If SQL-3 is selected SQT will ash continuously.

13
Operation
UHF CB RadioUNIDEN UH720SX-NB/UH710SX-NB
Selecting A Channel
Press or to select the desired channel.
NOTE
If you press and hold or the
channel numbers will scroll rapidly.
To Transmit And Receive
The radio uses the UHF-CB Channels.
For your reference a list of the available
channels and corresponding frequencies
is printed on page 25. (Channels 22 and
23 are for telemetry and telecommand
applications. Transmit is inhibited on
these channels).
1. The maximum RF transmit
power of the UH720SX-NB is 2 Watts
and UH710SX-NB is 1 Watt.
2. Before you transmit, listen for
activity on the selected channel.
3. When the channel is clear,
press and hold the to transmit.
TX appears on the LCD.
Hold the radio with microphone approximately
5 cm in front of your mouth with the antenna at
approximately 45° angle away from your head.
Speak in a clear, normal conversational voice.
4. When you have nished speaking, release the and listen for a response
then TX disappears on the LCD. BUSY appears while receiving a signal.
PTT
button

14
Operation
UNIDEN UH720SX-NB/UH710SX-NB UHF CB Radio
To Operate In Duplex Mode (Repeaters)
The Duplex function enables you to access local repeater stations.
NOTE
You can only activate Duplex on CH01-CH08 and CH41-CH48.
UHF CB Repeaters are used to retransmit or relay your signal. Repeaters will
extend the range of your radio and overcome the shielding effect caused by
solid obstructions.
Eg. CH01 is being used in your area for repeater use.
1. Press twice.
dP will ash.
2. Press or to change the selection.
r appears for CH01-CH08 and n appears
for CH41-CH48 when duplex is selected.
3. Press and hold to save and exit.
NOTE
Contact your retailer for a list of repeaters available in your area.
Operation with the aid of a Repeater

15
Operation
UHF CB RadioUNIDEN UH720SX-NB/UH710SX-NB
Transmit Power Select
The UH720SX-NB has three transmit power levels: 2 Watt, 0.5 Watt and 0.1 Watt.
The UH710SX-NB has three transmit power levels: 1 Watt, 0.5 Watt and 0.1 Watt.
To change your transmit power level:
1. Press while in the ’power middle level’ to change to ’power high level.’
2. Press while in the ’power high level’ to change to the ’power low level.’
3. Press while in the ’power low level’ to change to ’power middle level.’
NOTE
Transmitting on a higher level will use more Battery power but
will enable you to transmit further.
Scanning
The UH710SX-NB/UH720SX-NB has two types of scanning; Open Scanning
(OS) and Group Scanning (GS), OS Scan searches all the channels and
frequencies in its memory continuously. GS Scan is
similar to OS scan but has the added ability to monitor
the priority channel every 1.5 seconds.
Scanning allows you to search for active
channels programmed in the OS or GS memory.
To initiate scanning,
1. Assuming the unit is on CH01 when switched on.
2. Press and scanning starts.
SCAN ashes during scanning.
TX Power Low TX Power Middle TX Power High

16
Operation
UNIDEN UH720SX-NB/UH710SX-NB UHF CB Radio
Open Scan (OS) Mode
(The absence of GS icon indicates that the unit is on OS mode)
Allows continuous scanning of channels stored in the Open Scan (OS) memory.
If an active channel is found, scanning will stop on that channel.
NOTE
The factory has preprogrammed all the UHF-CB channels into
the Open Scan channel memory. However, you can change or
customise the channels by following the steps on programming
Scan Channels on page 18.
Example. CH40 becomes active
If the received signal cease, the unit will
wait for at least 3 seconds for the signal to
return, otherwise scanning resumes.
To skip the active channel, press or . Scanning resumes.
To deactivate SCAN, press or .
NOTE
1. If SCAN is deactivated while in an active channel, the radio
will stay on that active channel. If no other channels are
active, the radio will reinstate the starting channel.
2. If OS Scanning is initiated when there are no channels
programmed in OS memory, an error tone will be heard and
scanning will not start.

17
Operation
UHF CB RadioUNIDEN UH720SX-NB/UH710SX-NB
Group Scan(GS) Mode
To change between OS and GS scan;
1. Press four times.
GS setting ON or OFF will ash.
2. Press or to change the selection.
3. Press and hold to save and exit.
To initiate scanning,
1. When is pressed during
Group Scan Mode, SCN will blink
and Group Scan Scanning begins.
2. To deactivate GS scanning, press or .
NOTE
1. If SCAN is deactivated while it is tuned to an active
channel, the UH710SX-NB/UH720SX-NB will stay on that
active channel. If none of the channels re- active, the radio
will reinstate the Scan start channel.
2. If GS Scanning is initiated when there are no channels
programmed in GS memory, an error tone will be heard and
scanning will not start.

18
Operation
UNIDEN UH720SX-NB/UH710SX-NB UHF CB Radio
Priority Channel Watch During Group Scan
The feature allows user to monitor the Instant Priority channel (see page 19)
every 1.5 secs during Group Scanning. The Priority Channel can also be
monitored with Dual Watch, see page 19.
1. Press three times.
PRI setting ashes.
2. Press or to change the selection.
3. Press and hold to save and exit.
Programming Scan Channels
1. Select which Scanning Mode you wish to use on the channel OS or GS Mode.
NOTE
OS is indicated by the absence of the GS icon.
2. Select the channel you want to store by pressing or .
3. Press to store.
Micon appears.
4. To remove the channel from Memory, Press to remove.
Micon disappears.
Drop-Out Delay
While scanning, the radio stops at a busy channel and receives a signal. When
the received signal is over, the unit will wait for 3 seconds for the return of the
signal, otherwise, the radio resumes scanning.

19
Operation
UHF CB RadioUNIDEN UH720SX-NB/UH710SX-NB
Programming the Instant Priority Channel
Select the Channel you want to store as the Instant Priority Channel by
pressing or .
Press and hold for 3 seconds to program the channel. PRI icon appears.
Recalling the Instant Channel
Momentarily press the button to return to the Instant Channel.
Dual Watch
When Dual Watch function is active, priority channel is watched every
1.5 seconds.
Press to activate or deactivate Dual Watch. DUAL appears on the
display when activated.
Monitor
This feature enables users to listen in
for weak signals on the current channel
at the press of a button.
To use monitor,
• For continuous listening.
Press and hold .
A double tone beep will be heard and
the receiver circuit will stay open, letting
in both the noise & weak signals.
• Display shows BUSY.
• To return to normal receive mode press and hold .

20
Operation
UNIDEN UH720SX-NB/UH710SX-NB UHF CB Radio
CTCSS
CTCSS is a feature that allows a group
to talk to each other without hearing
other users on the same channel.
1. Select desired channel.
2. Press and hold .The current
DCS/CTCSS setting ashes.
3. Press or to select
desired CTCSS code.
4. To select off code, press and hold .
oF ashes.
5. Press to save and exit.
DCS
DCS is a digital extension of CTCSS.
It provides 104 extra, digitally coded,
squelch codes that follow after the 38
CTCSS codes. CTCSS 1-38, followed by
DCS 1-104.
Follow the steps for changing CTCSS
code but select DCS code as desired.
NOTE
Channels 05 and 35 are used for emergency channels. CTCSS
and DCS will not operate on these two channels.