Uniden UH750 User manual

UH750
Handheld UHF-CB Transceiver
For more exciting new products please visit our website:
Australia: www.uniden.com.au

WATERPROOF: JIS7
Uniden’s UH750 radio is designed to meet the water proong
standard of JIS7.
This Means:
Being dened as having no ingress of water when immersed at 1
metre for 30 minutes.
The UH750 will only meet this rating if fully assembled and all
rubber seals and bungs are well maintained and correctly tted.
This means that the speaker microphone bung is inserted, and
the battery pack and antenna are attached and securely
fastened.
LITHIUM ION BATTERY PACK WARNING
• This equipment contains a Lithium Ion Battery Pack.
• The Lithium Ion Battery Pack contained in this equipment may
explode if disposed of in a re.
• Do not short-circuit the Battery Pack.
• Do not charge the Lithium Ion Battery Pack used in this equipment in
any charger other than the one designed to charge this Battery Pack.
Using another charger may damage the Battery Pack or cause the
Battery Pack to explode.
• Lithium Ion batteries must be disposed of properly.
NOTE
USER LICENSE INFORMATION
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.
2
Warning
UNIDEN UH750 Handheld UHF-CB Transceiver

Introduction
Features 4
Included in your Package 5
Optional Accessories 5
Controls and Indicators 6
Getting Started
Mounting the Drop-in Charger 7
Attaching the Antenna 7
Attaching the Battery Pack 8
Attaching the Beltclip 8
Charging the Battery Pack 9
Battery Level Display 10
SPKR/MIC Jack Cap 10
Connecting the SPKR/MIC 10
Operation
Power On/Off 11
Volume 11
Adjusting the Key Beeps 11
Roger Beep 12
Selecting Channel 12
Squelch 13
To Transmit and Receive 14
Using a Repeater Channel 15
To Operate UH750 in Duplex Mode 16
Scanning 16
Open Scan (OS) Mode 16
Group Scan (GS) Mode 17
Programming Scan Channels 18
Priority Channel 18
Choosing a Priority Channel 18
Drop-Out Delay 18
Advanced Features 19
CTCSS 19
VOX 19
Power Save 20
Back Lighting 20
Keypad Lock 21
Busy Channel Lock-out (BCL) 21
Monitor 21
CTCSS Codes and Frequencies 22
UHF-CB Channel Guidelines 23
UHF-CB Channels and Frequencies 24
Warranty 26
3
Contents
UNIDEN UH750 Handheld UHF-CB Transceiver

4
Introduction
UNIDEN UH750 Handheld UHF-CB Transceiver
The UH750 is a JIS7 Waterproof, portable two-way UHF-CB radio. It 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 UH750 features, please
read this operating guide carefully before using the unit.
FEATURES
• Narrow Band (NB) Radio
• Communicate with up to 80 Channels in the UHF-CB Band1
• 5W Max TX Power
• 1W/5W Switchable TX Power
• Built-in AVS Circuitry2
• Waterproof (meets JIS7 waterproof specications)3
• Rubber Grips/Seal
• 38 Built-in CTCSS codes
• Backlit Keypad & LCD Display
• Duplex Mode1
• Open and Group Scan
• Busy Channel Lockout Function
• VOX Function
• Headset Jack
• Keypad Lock
• Battery Type: Lithium-lon Rechargeable
• Low Battery Alert
• Battery strength Indicator
• Auto Battery Save
• Battery Cover with charge contacts
• Roger Beep
¹ Refer to p.23 - p.25 for channel information
² AVS - Automatic Volume Stabilizer detects and manages incoming
audio to comparable levels.
3 The UH750 radio meets waterproof (JIS7) specications only
when the battery, the antenna and speaker MIC jack cap are correctly
installed. The UH750 will retain its JIS7 rating when the
accessory Speaker MIC is connected correctly but the Speaker MIC
itself is not splash or waterproof.

NOTE
If any of these items are missing from the box, contact your
place of purchase, immediately.
Optional Accessories
• VOX Headset
• Heavy Duty Speaker Mic
• External Speaker Mic
5
Included in your Package
UNIDEN UH750 Handheld UHF-CB Transceiver
UH750 AC Adaptor
(AAD-075S(M))
Antenna
Drop-in Charger
(DT075A)
Lithium Battery
(BP079)
Beltclip
Owner’s Manual Mounting Screws
UH750
For more exciting new products please visit our website:
Australia: www.uniden.com.au

6
Controls and Indicators
UNIDEN UH750 Handheld UHF-CB Transceiver
1 Antenna
2 Beltclip
3 Battery
4 Battery Release Clip
5 PTT (Push to Talk) Key
6 Memory Key (mem)
7 Scan Button (scan)/
Busy Channel Lock-Out
Mode (bcl)
8 TX Power/Lock Button
9 Microphone
10 Speaker MIC Jack
11 ON/OFF VOL Knob
12 Squelch Knob (SQ)
13 LCD Display
14 Monitor Button (mon)
15 Open Scan/Group Scan
(os/gs)/VOX
16 Channel Up Button ( )
17 Duplex Key (dup)/
CTCSS Key (ctcss)
18 Channel Down Button ( )
19 Speaker
A Transmit
B 1W Power
C Duplex Transmit
D Scanning
E Monitor
F Priority
G Busy Channel Lock Out
H Group Scanning
I Channel Numbers
J CTCSS
K VOX
L Roger Beep
M Battery Level Indicator
N Key Lock
O Memory
P Receive
UH750
5w
1

7
Getting Started
UNIDEN UH750 Handheld UHF-CB Transceiver
Mounting the Drop-in Charger
1. Mount the drop-in charger to either a table or wall.
Table:
Attach the drop-in charger using the mounting
screws and washers.
Wall:
Insert the two mounting screws into the wall
keeping the same space as the holes on the
charger.
Place the charger with the screws
through the larger holes then turn the
charger.
2. Plug one end of the AC adapter into
the wall outlet and the other end into the
drop-in charger.
When you mount the drop-in charger
in a mobile vehicle, use the optional
cigarette lead instead.
Attaching the Antenna
Attach the antenna to the UH750.
Be sure the antenna is rmly seated.

8
Getting Started
UNIDEN UH750 Handheld UHF-CB Transceiver
Attaching the Battery Pack
1. Place the battery pack onto the back of the
radio. It will only t in one way.
2. Snap the battery release clip until it clicks.
Be sure the battery pack ts tightly against
the UH750 body.
CAUTION
Avoid exposing the Lithium Ion battery, attached or
unattached to the radio, in direct sunshine, heated cars, or
in areas with temperatures below –20°C (–4°F) or above
+60°C (+140°F).
Exposing the chemicals contained within the battery pack to
temperatures above +60 °C (+140°F) may cause the battery
to rupture, fail or reduce performance.
In case of exposure to cell contents, wash the affected area
thoroughly, and seek medical attention.
Additional battery cautions should be applied as described
on p.2.
Attaching the Beltclip
1. Hold the beltclip in the direction.
2. Apply it to the hanger piece on the back of
the radio. Then slide it up.
3. You will hear a click. The beltclip is rmly
attached.
Contacts

9
Getting Started
UNIDEN UH750 Handheld UHF-CB Transceiver
4. To take the beltclip off the radio, turn it
and slid it up.
Charging the Battery Pack
Your radio is powered by a specially designed Lithium Ion battery pack.
• Before operating the UH750, charge the
Lithium Ion battery pack for 7 hours without
interruption in the drop-in charger.
1. Place the UH750 in the drop-in charger.
2. The red LED illuminates and stays ON, until fully
charged.
• The charger won’t overcharge the battery pack.
When charging is completed, the charge LED
is no longer illuminated.
• Do not transmit when the UH750 is in the drop-in charger!
• You can monitor incoming calls while the UH750 is in the
drop-in charger.
UH750
UH750

10
UNIDEN UH750 Handheld UHF-CB Transceiver
Getting Started
Battery Level Display
The BATTERY icon in the top right hand corner of the screen indicates
the UH750 current battery voltage level at all times. The battery level is
displayed in 4 levels.
LEVEL 4
Battery 100% full
LEVEL 2
Low Battery
NOTE
When PTT is pressed at Level Empty, battery icon and
channel number will ash, transmission is disabled.
NOTE
Recharge the battery at any time. From empty the battery
will take up to 7 hours to fully charge.
Battery Life : 14 Hours (Typical)
This is based on the following Duty Cycle:
Transmit (Low Power) 5%
Receive 5%
Stand-by 90%
SPKR/MIC Jack Cap
Make sure the SPKR/MIC jack cap is rmly pushed in to maintain
submersible rating.
Connecting the Optional SPKR/MIC
Release the SPKR/MIC jack cap to plug in the SPKR/MIC. Secure the
SPKR/MIC plug by tightening the plug collar clockwise.
LEVEL 3
Battery approx.
40% capacity
LEVEL 1
(ashing)
Empty Battery

11
Operation
UNIDEN UH750 Handheld UHF-CB Transceiver
• See the Controls and Indicators page at the back of this operating
guide for button and key operations.
Power On/Off
To turn the unit ON, rotate the [ON/OFF VOL]
clockwise. A channel number and battery level
should appear on the display.
To turn the unit OFF, rotate the [ON/OFF VOL]
knob counter-clockwise. The display will disappear.
Volume
Rotate the [ON/OFF VOL] knob clockwise or counter-clockwise to adjust
speaker volume to desired listening level.
Adjusting the Key Beeps
Your radio emits a beep each time-one of the keys (except for the PTT or
mon) are pressed.
To turn OFF this beep: Press and hold dup while turning on the radio.
To turn ON this beep: Press and hold dup while turning on the radio.
UH750

12
UNIDEN UH750 Handheld UHF-CB Transceiver
Operation
Roger Beep
Roger Beep is a BEEP that is sent to notify the end of transmission
(both PTT and VOX transmission.) Roger Beep can be heard through
the speaker when Key Beep is on. Roger Beep is transmitted even if
key beep is turned off. However Roger Beep will not be heard from the
speaker.
To turn ON Roger Beep: Press and hold while turning on the
radio.
To turn OFF Roger Beep: Press and hold while turning on the
radio.
Selecting Channel
Press or to select the desired channel.
NOTE
If you press and hold the or , channel number will
scroll rapidly.
NOTE
For your reference a list of the available channels,
corresponding frequencies and guidelines for their use and
selection is printed on page 23. For Australia, Channels 05
and 35 are reserved for Emergency Calls.

13
Operation
UNIDEN UH750 Handheld UHF-CB Transceiver
Squelch
The squelch is used to eliminate any annoying background noise when
there are no signals present.
NOTE
Make sure to rst select a channel not in use before setting
the squelch in your UH750 UHF-CB radio.
Think of squelch as a gate. Turn [SQ] fully
clockwise. This raises the “Squelch Gate” so high
that only the very strong signals can get through.
Turn [SQ] fully counter clockwise until you hear a
hiss. This opens the “Squelch Gate” so that
everything gets through noise, weak signal, and
strong signals.
To set the “Squelch Gate” to the desired level, turn
[SQ] counter-clockwise until you hear noise. Then
turn the [SQ] clockwise just until the noise
stopped. Now only the desired signal can get
through.
NOTE
If an incoming signal is very weak there is a possibility that
you will have a choppy or broken reception, due to the
sensitivity of the squelch. In this case, simply rotate the
[SQ] clockwise until the weak signal is heard clearly.
10
SQUELCH
The squelch is used to eliminate any annoying background noise when there
are no signals present.
Think of squelch as a gate. Turn [SQ] fully
clockwise. This raises the "Squelch Gate" so high
that only the very strong signals can get through.
Turn [SQ] fully counter clockwise until you hear a
hiss. This opens the "Squelch Gate" so that
everything gets through noise, weak signal, and
strong signals.
To set the "Squelch Gate" to the desired level, turn
[SQ] counter-clockwise until you hear noise. Then
turn the [SQ] clockwise just until the noise
stopped. Now only the desired signal can get
through.
If an incoming signal is very weak there is a
possibility that you will have a choppy or broken
reception, due to the sensitivity of the squelch.
In this case, simply rotate the [SQ] clockwise
until the weak signal is heard clearly.
Noise
Weak Signals
Medium Signals
Strong Signals
Make sure to first select a channel not in use before setting the
squelch in your UH076SX UHF-CB radio.
UH076SX
UH750

14
UNIDEN UH750 Handheld UHF-CB Transceiver
Operation
To Transmit and Receive
The UH750 uses the UHF-CB Channels. For your reference a list of the
available channels and corresponding frequencies is printed on p.24 -
p.25.
1. The maximum RF transmit power of UH750 is 5 Watts.
To switch to low power, press 1/5w . LOW
appears on the LCD.
To switch back to higher power, press 1/5w
again. LOW indicator disappears from the LCD.
2. Before you transmit, listen for activity on the
selected channel.
3. When the channel is clear, press and hold the
PTT to transmit. TX appears on the LCD.
Hold the radio with microphone approximately
ve cms 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
PTT and listen for a response. TX indicator
then disappears on the LCD.
The display shows BUSY when a transmission
is being received by your radio.

15
Operation
UNIDEN UH750 Handheld UHF-CB Transceiver
Using a Repeater Channel
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.
In normal Simplex operation, your radio transmits on one particular
frequency and receives on that same frequency. If there is a barrier (i.e.
a Tall Building) that partially blocks your transmitted signal, the possibility
of the other radio receiving the signal is very slim. Valleys, metallic
structures, etc., tend to act as a screen between radios.
Standard Operation without the aid of a Repeater Station
Operation with the aid of a Repeater
With Duplex operation, the signal coming from your radio is received
by the Repeater station and then re-transmitted at the same time on
another channel.
Your UH750 is designed with duplex capability on Channels 1 to 8 and
Channels 41 to 48. When any of these channels are set to operate in
duplex mode during transmission, the UH750 automatically sends the
signal at a frequency 30 channels above the original in order to access
the repeater station. After transmitting, the radio reverts back to its original
operating frequency.
For example:
1. CH01 is on Duplex Mode - will receive on CH01 but Transmit on CH31
2. CH41 is on Duplex Mode - will receive on CH41 but Transmit on CH71,
etc... Refer to UHF-CB Channel & Frequencies table on p.24 - p.25.

16
UNIDEN UH750 Handheld UHF-CB Transceiver
Operation
To Operate UH750 in Duplex Mode
Only channels 01 - 08 and 41 - 48 are available for Duplex.
Eg. CH01 is being used in your area for repeater use.
Press dup momentarily. The DUP icon appears.
Press dup again to deactivate the duplex operation.
UH750 will return to simplex operation.
NOTE
Check with your local retailer for available repeaters.
Scanning
The UH750 has two types of scanning; Open Scanning (OS) and Group
Scanning (GS). Scanning allows you to search for active channels
programmed in the OS or GS memory.
To initiate scanning;
Press scan and scanning starts. SCAN icon ashes during scanning.
Open Scan (OS) Mode
The absence of GS icon indicates that the unit is in 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 customize the channels by following the steps on
programming Scan Channels on page 18.
Example: CH80 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 mem momentarily. Scanning resumes.
To deactivate SCAN, press scan or PTT .

17
Operation
UNIDEN UH750 Handheld UHF-CB Transceiver
NOTE
If SCAN is deactivated while in an active channel, the
UH750 will stay on that active channel. If no other channels
are active, the UH750 will reinstate the starting channel.
Group Scan (GS) Mode
Allows you to monitor a Priority Channel while scanning.
To use GS Mode Scanning, press the os/gs key. GS icon appears on
the display.
GS Scanning checks the Priority channel activity regularly.
NOTE
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.
If the Priority channel becomes active the radio will stay on that channel
for as long as the signal is present. If the received signal ceases, Priority
scanning continues after 3 seconds.
NOTE
If scanning stops on a channel which is not a Priority
Channel the UH750 will continue monitoring the Priority
Channel for activity while listening to the active one.
To deactivate SCAN, press scan or PTT .
NOTE
If SCAN is deactivated while it is turned to an active
channel, the UH750 will stay on that active channel. If none
of the channels are active, the UH750 will reinstate the
Priority channel.

18
UNIDEN UH750 Handheld UHF-CB Transceiver
Operation
Programming Scan Channels
1. Select which Scanning Mode you wish to use 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 and hold mem for 1.5 secs. to store. MEM icon appears and
two short tone beeps are heard.
4. To remove the channels from Memory, press and hold mem for 1.5
secs. once more. Two short tone beeps are heard and the MEM icon
disappears.
Priority Channel
The Priority Channel feature allows the user to monitor one channel in
the UH750, monitoring it every 1.5 secs. during Group Scanning.
Choosing a Priority Channel
The starting channel, when Group Scanning is
initiated, is always the Priority Channel. To change
the priority channel setting while scanning,
(eg. PRI Channel is CH17 (476.825 MHz ));
a. press , to select a higher channel
(scanning pauses).
or
b. press , to select a lower channel
(scanning pauses).
Drop-out Delay
While scanning, the UH750 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
UNIDEN UH750 Handheld UHF-CB Transceiver
Advanced Features
CTCSS (Continuous Tone Coded Squelch System)
CTCSS is a feature that allows a group to talk to each other without
hearing other users on the same channel.
Programming CTCSS Code
1. Select a desired channel to be used with CTCSS.
2. Press and hold ctcss for 1.5 secs. CTCSS icon blinks.
3. Press or to select the desired CTCSS code.
4. Press ctcss to save the selected code. CTCSS icon stops blinking.
NOTE
The UH750 will return to standby mode after 10 secs. of
no activity. CTCSS code can be programmed on every
channel. There are 38 available CTCSS tone per channel.
CTCSS Scan Operation
1. Press scan to start scanning (GS or OS) mode.
2. Press and hold ctcss to change to CTCSS scan mode.
3. When a signal is sensed on a CTCSS CH, the UH750 stops for
about 400 msecs (decode time) to decode the CTCSS code. If there is
no code or the receive code does not match the one programmed on
the unit, the unit resumes scanning.
NOTE
Channels 5 and 35 are used for emergency channels.
CTCSS will not operate on these channels.
VOX
• Built-in Voice Activated Circuit (VOX) feature enables the user to
transmit automatically by speaking on the microphone of the VOX
headset (not supplied) without pressing the PTT switch.

20
UNIDEN UH750 Handheld UHF-CB Transceiver
Operation
NOTE
VOX feature will not work without the VOX Headset
Microphone. The built in mic of UH750 is temporarily
disabled when VOX feature is working, however accidental
pressing of PTT will cause the unit to transmit briey.
To activate VOX
1. Press and hold vox for 1.5 secs. VOX icon blinks.
2. Press either or within 10 secs to select the desired
VOX sensitivity level (9 with the lowest sensitivity to 1 with the
highest sensitivity).
3. Press vox to save the selected level. VOX icon stops blinking.
4. Install VOX Headset (not supplied) to UH750.
To De-activate VOX
1. Remove VOX Headset from UH750.
2. Press and hold vox for 1.5 secs. until VOX blinks.
3. Press repeatedly and until oF is displayed.
4. Press vox to save the setting. VOX icon disappears.
NOTE
Changing the VOX sensitivity setting to oF without removing
the microphone will cause the unit to transmit continuously.
Power Save
Battery Save feature extends the battery life by switching the receiver
circuit power ON and OFF. This feature automatically activates during
standby mode (RX mode without signal).
Back Lighting
The Liquid Crystal Display (LCD) and function keys are backlit for easy
viewing at night or in low light situations. The back lighting automatically
switches ON every time a key (except PTT) is pressed. It turns OFF 5