Uniden UH7750NB User manual

UH7750NB
UHF CB Transceiver
Downloaded from www.cbradio.nl

Introduction
Features 3
Preventive Maintenance 4
Troubleshooting 4
Controls / Connectors 5
Indicators 9
Included with Your UHF CB Transceiver 10
Optional Accessories 11
DIN-E Installation (UH7750 only) 12
Connecting the Microphone 14
Mounting the MIC Hanger 15
Operation
Turning on the Power 17
Setting the Volume 17
Setting the Manual Squelch 18
Setting the Auto Squelch 18
Monitor 19
Selecting a Channel 19
Programming the Instant Priority Channel 20
Recalling the Instant Channel 20
Transmitting 20
Call Function 20
Dual Watch 20
Using Repeater Channels 21
Operating the UHF CB Radio in Duplex Mode 22
Scanning 22
Open Scan (OS) Mode 23
Group Scan (GS) Mode 23
Priority Watch 24
Add/Remove Channels from SCAN Memory 24
50 RX Channels 25
Manual Programming 25
Deleting a programmed RX Channel frequency 25
Selecting the Call tone 26
Busy Channel Lockout 26
Roger Beep 27
Beep On/Off 27
CTCSS (Continuous Tone Coded Squelch System) 28
DCS (Digitally Coded Squelch) 28
Volume Sync 29
Backlight Colours 29
Backlight Brightness 30
LCD Contrast for Remote SPK/MIC 30
UHF CB Channel Guidelines 31
CTCSS & DCS Code List 34
Warranty 38
Contents
2
UNIDEN UH7740NB UH7750NB UHF CB Transceiver

The Uniden UH7740NB and UH7750NB is designed to provide you with years of
trouble free service. Its rugged components and materials are capable of withstanding
harsh environments. Please read this Operating Manual carefully to ensure you gain
the optimum performance of the unit.
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.
Features
• NarrowBand(NB)80ChannelRadio*
• TransmissionPower5W
• 50ProgrammableReceivechannels
(450 - 520MHz in 12.5khz steps)
• Built-inAVSCircuitry†
• LCDDisplaywithBacklight
• LCDBacklightbrightnesscontrol
(“off”, “01”, “02”, “03”)
• CompactSize**
• MobileDINSize***
• FrontFireSpeakerwithSAW
 Acoustics***
• SignalStrength/PowerMeter
• InstantChannelProgramming
• OnetouchInstantChannelrecalling
• DualWatchwithInstantChannel
• DuplexCapability(fromCH01-CH08
and CH41 - CH48 per channel)
• GroupScanandPriorityChannel
Watch
• OpenScan
• ScanChannelMemoryOn/Off
separately with Open Scan, Group
Scan
• RotaryChannelSelect
• BusyChannelLock-outFunction
• RogerBeepFunctionOn/Off
• 5DifferentCallTones
• 38Built-inCTCSS(ContinuousTone
Coded Squelch System) and 104
additional DCS (Digital Coded Squelch)
codes that are user selectable
• VolumeControlwithPowerOn/Off
Push Switch
• OptionalRemoteLCDSpeaker
Microphone (Remote SPK/MIC) and
Extension Cable
• FrontandRearMICJacksfor
increased mounting options
• VariableSquelchLeveladjustorAuto
Squelch with optional Remote SPK/
MIC
* Refertop.31-p.33forchannel
information
** UH7740NB
*** UH7750NB,SAWAcoustics(square
acoustic waveguide design)
†AVS - Automatic Volume Stabilizer
detects and manages incoming
audio to comparable levels.
Introduction
3
UNIDEN UH7740NB UH7750NB UHF CB Transceiver

Preventive Maintenance
The following system checks should be made every six to twelve months:
• ChecktheStandingWaveRatio(SWR).
• Inspectthetightnessofallelectricalconnections.
• Inspecttheantennacoaxialcableforwearorbreaksontheshielding.
• Inspectthetightnessofallscrewsandothermountinghardware.
Troubleshooting
Should the unit malfunction or perform poorly, follow these procedures:
If the transceiver is completely inoperative: Check the power cord and fuse.
If there is trouble with receiving: Check the VOLUME control setting. Be sure the
SQUELCH is adjusted properly. Possibly the radio is over-squelched.
If there is trouble with transmitting: Check that the transmission line (coaxial cable)
is securely connected to the ANTENNA connector. Check that the antenna is fully
extended for proper operation. Check that all transmission line (coaxial cable)
connections are secure and free of corrosion.
NOTE
Blackening may occur on the Liquid Crystal Display if the UHF CB
Radio or optional Remote SPK/MIC has been subjected to extreme high
temperature (above 60°C). This is not a fault. Normal LCD operation
resumes when the temperature stabilizes back to standard operating
condition (0-55°C).
Introduction
4
UNIDEN UH7740NB UH7750NB UHF CB Transceiver

UH7740NB Front View
UH7750NB Front View
Controls/Connectors
5
UNIDEN UH7740NB UH7750NB UHF CB Transceiver
Controls and Connectors
1 Rotary CHANNEL Selector
2 MENU/ENTER - Menu and Select
Button
3 DUAL - Dual Watch
MON - Monitor Button
4 DCS/CTCSS - DCS and CTCSS
Tone Button
5 MEM - Memory Scan Channels
6 SCAN - Scan On/Off
OS/GS - Open or Group Scan
7 Liquid Crystal Display (LCD)
8 SQ - Rotary Squelch control
9 VOL - Rotary Volume control
ON/OFF - On/Off PUSH control
10 MIC-FrontMicrophoneJack
2 3 4 5 6 7
7
8
9
10
1
21 3 4 58 6 10 9

Controls/Connectors
6
UNIDEN UH7740NB UH7750NB UHF CB Transceiver
UH7740NB Rear View
Connectors
11 RearMICJack
12 UHF Antenna Connection
13 Power Input Connection (13.8VDC)
14 Ext.SpeakerJack
UH7750NB Rear View
1311 12 14
11 1312 14

Controls/Connectors
7
UNIDEN UH7740NB UH7750NB UHF CB Transceiver
15
16
17 30
31
21
Standard Microphone
Controls and Connectors
15 CALL - Call Tone Button
16 INST - Instant Channel Button
17 PTT - Push To Talk Button
21 MICROPHONE
30 RJ45typeplug
31 FrontMICJackCover

Controls/Connectors
8
UNIDEN UH7740NB UH7750NB UHF CB Transceiver
Remote LCD Speaker Microphone (Remote SPK/MIC)
(Optional)
Controls and Connectors
15 CALL - Call Tone Button
16 INST - Instant Channel Button
17 PTT - Push To Talk Button
18 MENU/ENTER - Menu and Select Button
19 MEM - Memory Scan Channel
20 SCAN - Scan Button
OS/GS - Open Scan/Group Scan
21 MICROPHONE
22 SPEAKER
23 Liquid Crystal Display (LCD)
24 VOL - Volume Up Button
25 VOL - Volume Down Button
26 POWER - Power ON/OFF Button
27 SQL - Auto Squelch
MON - Monitor Button
28 DCS/CTCSS -- DCS & CTCSS Button
DUAL - Dual Watch Button
29 Select Up and Down Buttons
30 RJ45typeplug
31 FrontMICJackCover
15
17
24
18
25
19
26
30
31
20 27
28
29
23
16
21
22

Indicators
9
UNIDEN UH7740NB UH7750NB UHF CB Transceiver
UH7740NB and UH7750NB
Optional Remote MIC LCD
1
5
6
7
9
10
2
3
4
14
13
12
11
21
20
19 16
15
17
18
8
7414
17
2
11
10
20
18
22 16 9
8
6
12
5
3
1
5
6
7
9
10
2
3
4
14
13
12
11
21
20
19 16
15
17
18
8
7414
17
2
11
10
20
18
22 16 9
8
6
12
5
3
Indicators
1. TX - Transmit
2. DUAL - Dual Watch
3. SCAN - Scan mode
4. Channel Frequency
5. GS - Group Scan
6. INST - Instant Channel
7. PRI - Priority Channel
8. M - Channel in Memory
9. Channel Number
10. DCS/CTCSS Code Number
11. S/RF- Receive Signal or Transmit
12. Signal Power Level
13. CTCSS -Continuous Tone
Coded Squelch System
14. BCL - Busy Channel Lockout
15. VSc - Volume Synch
16. DCS - Digital Coded Squelch
17. MON - Monitor
18. RSQ - Remote Mic Squelch
19. SQT - Tight Squelch Level
20. BUSY - Channel Active
21. DUP - Duplex Channel
22. CALL - Call Tone

Included with your UHF CB Transceiver
10
UNIDEN UH7740NB UH7750NB UHF CB Transceiver
Standard Microphone UHF CB Transceiver
Owners Manual
Microphone Hanger
with Screws/Washers
andMicrophoneJack
Rubber Cover
Mounting Bracket,
Mounting Screws,
Washer Stars And Screws
(UH7740NB only)
Quick Release Bracket
(UH7740NB only)
Mounting Bracket,
Mounting Screws,
Washer Stars And Screws
(UH7750NB only)
DIN-E Sleeve, DIN-E rubber
ring and keys for vehicle
installation
(UH7750NB only)
DC Power Cord with fuse
UH7740NB
UH7750NB
UHF CB Transceiver
For more exciting new products please visit our website:
Australia: www.uniden.com.au
New Zealand: www.uniden.co.nz