Uniden uh012sx User Manual

UNIDEN Model uh012sx UHF

CB Radio

UNIDEN Model uh012sx UHF CB Radio

Contents

Introduction 2

Features 2 Preventative Maintenance 2 Troubleshooting 2

Controls/Connectors 3

Indicators 4

Included with your uh012sx 5

Operation

Setting the FM Squelch 6 Selecting a Channel 7 Transmitting 7 Using Repeater Channels 7 Operating the uh012sx in Duplex Mode 8 Scanning (Open Scan) 8 Open Scan (OS) Mode 8 Programming the Instant Priority Channel 9 Recalling the Instant Channel 9 Continuous Tone Coded Squelch System (CTCSS) 9

UHF CB Channels & Frequencies

Warranty 11

UNIDEN Model uh012sx UHF CB Radio

Introduction

The Uniden uh012sx 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.

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

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

7 Segments LED

Instant Channel (programmable)

One touch Instant Channel recalling

Duplex Capability (from CH01 - CH08 per channel)

Open Scan

38 Built-in CTCSS codes

Rotary Channel Select

Variable Squelch Level Adjust

Volume Control with Power On/Off Switch.

Compact Dimensions: 127mm(w) x 36mm(h) x 148mm(l)

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 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.

Check the CTCSS code.

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:

UNIDEN Model uh012sx UHF CB Radio

Controls/Connectors

uh012sx

A S C Technology

Advanced Signal Clarity

TX BUSY CTCSS

CTCSS

Controls and Connectors

Ref Item Page Ref Item Page

Rotary Channel Selector 7

On/Off Volume & Squelch 6

Push to Talk (PTT) Switch 7

INST - Instant Channel Recall & Instant Channel Programming 9

SCAN - Scan On/Off 8

DUP - Duplex On/Off 8 /CTCSS - Continuous Tone Coded Squelch System 9

External Speaker Jack -

Power Input (13.8V DC) 2

UHF Antenna Connection 2

UNIDEN Model uh012sx UHF CB Radio

Indicators

uh012sx

A S C Technology

Advanced Signal Clarity

BUSY CTCSS

1 2 34

Indicators

LED It is turned on when transmitting condition.

LED It is turned on when receiving a signal or decoding a CTCSS

BUSY

code. It blinks while receiving a signal in scan mode.

CTCSS

LED It is turned on when the current displayed channel has CTCSS

set. It blinks when the CTCSS code is decoded OK.

LED (40) Indicates the Channel Number.

UNIDEN Model uh012sx UHF CB Radio

Included with your uh012sx

uh012sx

Mod

Unid

CB Rad

uh012sx Owners Manual

Mounting Bracket, Knobs

Rubber Washer, Washer Stars

And Screws

Microphone

Microphone Hanger, Screws

and Washers

Optional Accessories

DIN Mounting Kit (DMK8990)

DC Power Cord with fuse

External Speaker (MS100)

UNIDEN Model uh012sx UHF CB Radio

Operation

Setting the FM Squelch

Turn the Unit ON by rotating the volume control clockwise. Turn the outer ring of the control to adjust the Squelch.

You must select a channel which is not in use before setting the SQUELCH control. (see p.7)

A S C Technology

Advanced Signal Clarity

TX BUSY CTCSS

CTCSS

uh012sx

Think of the squelch control as a gate. If you turn Squelch fully clockwise it raises the 'Squelch gate' so high that no signals get through.

If you turn the Squelch fully counterclockwise it lowers the 'Squelch Gate' to the extent that all signals get through weak, medium and strong signals and noise.

To set the 'Squelch Gate' to the desired level, turn the squelch knob counterclockwise until you hear noise. Then carefully turn the Squelch knob clockwise until the noise fades. Now only strong signals get through.

UNIDEN Model uh012sx UHF CB Radio

Operation

Selecting a Channel

Turn the Rotary Channel Selector to select the desired channel.

For your reference a list of the available channels, corresponding frequencies and guidelines for their use is printed on page

10. For Australia, Channels 05 and 35 are reserved for Emergency Calls.

Transmitting

The uh012sx uses the 40 UHF-CB Channels

and 23 are for telemetry and telecommand applications. Transmit is inhibited on these channels).

Select the desired channel. Press the microphone's PTT button and speak normally into the microphone. Hold it approx. 7cm from your mouth. Release the PTT button to end the transmission and listen for a reply.

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.

(Channels 22

Standard Operation without the aid of a Repeater Station.

The signal coming from your radio is received by the Repeater Station and the re-transmitted at the same time on another channel. This operation is called "Duplexing".

For example,

CH01 on Duplex Mode will Receive on CH01 but Transmit on CH31 CH02 on Duplex Mode will Receive on CH02 but Transmit on CH32 etc...

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

Operation with the aid of a Repeater Station (Duplex).

UNIDEN Model uh012sx UHF CB Radio

Operation

Operating the uh012sx in Duplex Mode

For this example we are adopting CH01 as the channel being used in your area for repeater use. Press to switch Duplex On. "r" (for repeater) is displayed in place of the 1st digit of the channel number indicator. e.g. 01 : normal channel 1 r1 : duplex channel 1

If Duplex is not required - press again to switch Duplex off. Only channels 01 - 08 are available for Duplex.

Check with your local Retailer for information on available repeaters.

Scanning (open scan)

The uh012sx has a scanning feature that allows you to search for active channels automatically.

A S C Technolo

Advanced Signal Clari

BUSY

CTCS

Press and Scanning starts.

A S C Technolo

Advanced Signal Cla

Open Scan (OS) Mode

Allows continuous scanning of all channels in ascending order. If an active channel is found, scanning will stop on that channel.

If the received signal ceases, the unit will wait 3 seconds for the signal to return, otherwise scanning resumes.

To deactivate SCAN, press or the PTT button on the microphone.

If SCAN is deactivated while on an active channel, the uh012sx will stay on that channel. If no channels are active, the uh012sx will reinstate the starting channel.

BUSY

CTCS

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