Uniden UH088SX User Manual 2

UNIDEN uh088sx

CB RADIO

UNIDEN UHF CB Transceiver

Contents

Controls/Indicators/Connections

Controls....................................................................................... 3

Indicators.................................................................................... 4

Connections................................................................................ 5

Introduction

Features....................................................................................... 6

PreventativeMaintenance............................................................ 6

Troubleshooting.......................................................................... 6

Memory Backup.......................................................................... 6

Layout......................................................................................... 7

Included with youruh088sx CB radio................................................ 8

Operation

Setting the Squelch....................................................................... 9

Selecting a Channel...................................................................... 10

Transmitting................................................................................ 10

Using Repeater Channels............................................................. 10

Operating the uh088sxin DuplexMode........................................ 11

Scanning...................................................................................... 11

Open Scan (OS)Mode.................................................................. 11

Group Scan (GS)Mode................................................................. 12

Choosing a Priority Channel......................................................... 13

Drop Out Delay............................................................................. 13

ProgrammingScan Channels....................................................... 14

Channel Seeking Operation.......................................................... 15

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UNIDEN UHF CB Transceiver

Contents

Continuous ToneCodedSquelchSystem (CTCSS)............................... 16

Selective Calling (OptionalSelcall PCBRequired)

Outline........................................................................................ 17

Selective Calling (SELCALL)......................................................... 17

Receiver Quieting (Tone Squelch)................................................ 17

Call Alarm.................................................................................... 17

ToneSquelch Scanning................................................................ 17

ToneCalling................................................................................. 17

Group Calling Capability............................................................... 17

Tables

FM-CB FrequencyList.................................................................. 18

CTCSS Tone List............................................................................ 18

Warranty............................................................................................. 19

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UNIDEN UHF CB Transceiver

Controls/Indicators/Connections

uh088sx
CONTROLS

19

1

2

3

4

5

10

LIQUID CRYSTAL DISPLAY (LCD) PANEL - Indicators for TX, CAL, MEM, TSQ, GS (OS), SCN

1.

PRI, Channel Number, Frequency, Signal Strength Level (S), Transmit Power Level (RF),CTCSS Code
and DUP.

UP/DOWN CHANNEL SELECTOR

2. -These controls are used to select the desired
communication channel.

ON/OFF, VOLUME & SQUELCH CONTROLS

3.

ON/OFF & Volume Control (Centre Knob)

Turns the uh088sx power ON or OFF and adjusts the volume.

Squelch Control (Outer Ring)

Eliminates background noise in the absence of an incoming spiral.

PUSH-TO-TALK (PTT) - SWITCH -

4. Press to transmit and release to receive.

TONE CALL CONTROL BUTTON

5. - Press to transmit SELCALL codes, it functions on condition that
SELCALL option is installed.

DUPLEX Control

6.
Press this button momentarily to choose semi-duplex opeartion for channels 1 through 8.

OPEN SCAN/GROUP SCAN CONTROL (OS/GS)-

7. Switches operation between OPEN SCAN and

GROUP SCAN Mode.

SCAN CONTROL (SCAN) Normal OS/GS

8. - Press to activate scanning or press and hold to enable Seek Mode
OS/GS Scanning.

9

8

7

6

3

UNIDEN UHF CB Transceiver

Controls/Indicators/Connections

9. MEMORY CONTROL (MEM) -

10. TONE SQUELCH CONTROL (TSQ) -

SELCALL option is installed.

10 Secondary function: Continuous Tone Coded Squelch System (CTCSS)

group to talk to each other without hearing other users on the same channel.

INDICATORS

Places channel numbers into the memory scan list (OS or GS).

Controls Tone Squelched operation (quiet Mode) on condition that

19

212022

12

18

17

16

15

11. Channel Indicator

Indicator becomes a Memory location indicator.

12. Scan Indicator (SCN)

selected the SCN icon blinks.

13. Priority Indicator (PRI)

regularly being checked for activity while GS scanning.

14. Continuous Tone Coded Squelch System (CTCSS) Code

current channel.

15. Frequency Indicator

16. RECEIVE SIGNAL/ RF LEVEL indicator (S/RF)

or the relative transmit power (RF) when transmitting.

- Indicates the channel number currently selected. On TX SELCALL usage the Channel

- SCN icon appears when normal Scan mode is activated. When Seek mode Scanning is

- Indicates that priority channel is active when continuously lit or flashes when it is

- Shows the frequency of the current selected channel.

14

13

- Indicates the CTCSS code selected for the

- Indicates the relative signal strength level when receiving (S)

- is a feature that allows a

1211

17. DUPLEX Indicator (DUP)

18. TRANSMIT indicator (TX)

transmitting. The RF icon also appears at this time.

19. TONE SQUELCH indicator (TSQ) - The TSQ icon will appear when the selected channel is set to operate in
Quiet Mode, or flashes when the radio is called using SELCALL.

20. CALL Indicator (CAL)

appears when SELCALL codes are being transmitted.

21. MEMORY Indicator (MEM)

OS Memory.

22. GROUP SCAN Indicator (GS)

indicated by the absence of the GS icon.

- The DUP icon appears when duplex operation is selected.

- TX appears when the PTT button on the microphone is pressed and the radio is

- The CAL icon appears when the uh088sx radio is called using SELCALL. It also

- MEM appears when the displayed channel is programmed either in GS or

- The GS icon appears when Group Scan Mode is activated. Open scan is

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UNIDEN UHF CB Transceiver

Controls/Indicators/Connections

CONNECTIONS
FRONT PANEL

23

23. MICROPHONE SOCKET

The microphone plug is inserted into this socket.

BACK PANEL

24

25

24. EXTERNAL SPEAKER JACK -

internal speaker is automatically disconnected. The connecting wire must use a 3.5mm miniature plug only.

25. ANTENNA CONNECTOR

26. DC POWER CORD

transceiver.

- DC Power is connected to the transceiver through this jack. A power cord is supplied with the

used for remote receiver monitoring. When the external speaker is connected, the

- Connect the Antenna here using a standard UHF (PL259) type connector.

26

5

UNIDEN UHF CB Transceiver

Introduction

The Uniden uh088sx is designed to provide you with years of trouble free service. It's rugged components and
materials are capable of withstanding harsh environments.

We are certain that you will enjoy your uh088sx. Please read this operating Manual carefully to ensure you gain the
optimum performance of the unit.

Features

!

Transmit & Receive FM 40CH (UHF - CB, TX Power 5w)

!

7 Segments LCD

!

CTCSS function

!

Tone Squelch (Selcall) Capability

!

Duplex Capability (from CH01 - CH08 per channel)

!

Open Scan/Group Scan

!

Variable Squelch Level adjust

!

Volume Control with power ON/Off Switch

Preventative 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 all other mounting hardware.

Troubleshooting

Should the unit malfunction or perform poorly, follow these procedures:

!

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.

Memory Backup

A built in EEPROM protects the channels stored in the uh088sx memory after the DC power cable is
disconnected

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UNIDEN UHF CB Transceiver

Introduction

LAYOUT
Front Panel Layout

Microphone Layout

PTT Tone Call

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UNIDEN UHF CB Transceiver

Included with your uh088sx CB radio

uh088sx

UNIDEN

CB RADIO

uh088sx Owners Manual Microphone

Mounting Bracket, Knobs,

Rubber washer, Washer Stars

and Screws.

DC Power Cord with fuse

Microphone Hanger Screws

and washers

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UNIDEN UHF CB Transceiver

Operation

Setting the Squelch

1. To turn the unit ON, rotate volume clockwise.
Adjust volume to a comfortable level.

You must select a
channel which is
not in use before
setting the SQUELCH
control.(see p.10)

2. Think of the Squelch control as a gate. If you turn SQUELCH

fully clockwise it raises the "Squelch Gate so

that no signals get through.

3. If you turn the SQUELCH fully counter clockwise, it lowers the

"Squelch Gate" so that everything gets through - noise,
weak signals and strong signals.

4. To set the "Squelch Gate" to the desired level, turn SQUELCH

counterclockwise until you hear noise. Then turn the SQUELCH

clockwise just until the noise stops. Now only strong signals get through.

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UNIDEN UHF CB Transceiver

Operation

SELECTING A CHANNEL

Press or button to select a channel

TRANSMITTING

Select the desired channel. Press the Microphone's PTT button, hold it approx
7cm from your mouth and speak normally into the microphone.
The icon will light. Release the PTT button to end
the transmission and listen for a reply.

PTT

USING REPEATER CHANNELS

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 that partially blocks your
transmitted signal, the probability of another radio receiving the signal is very slim. Hills, tall buildings, metallic
structures, ... etc. tend to act as a screen between radios.

The Signal coming from your radio is received by the Repeater Station and then retransmitted at the same time
on another channel. This operation is called "Duplexing".
For example,
CH01 on Duplex Mode will Receive on CH 01 but Transmit on CH31

CH02 on Duplex Mode will Receive on CH 02 but Transmit on CH32 etc ....

If you transmit on CH01 Duplex mode, you are actually transmitting on CH31, the repeater station down-converts
your signal and retransmits on CH01.

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