Uniden UH-O53 User Manual

uniden

Sundowner

UH-053

16-Channel Personal

UHF 2-Way Radio

Operating Manual

P¡ease£eadcarefuM^_beforeogeratm^^

S afe ty In form ation

• D O NOT operate the transmitter of any radio
equipment with the antenna touching, or dose to the
eyes, face, or exposed body parts.

• DO NOT operate the transmitter of any radio
equipment uniess aii the Radio Frequency (RF)
connectors are secure and any open connectors are
properly terminated,

• DO NOT operate frie transmitter of any radio

equipment near eiectricai biasting caps or in an
expiosive atmosphere.

• D O N O T let chiidren operate any transmitter­equipped radio equipment.

• Have your radio equipment serviced by a qualified
technician.

N ick e i- C adm ium B a tte ry W a rnin g

• This equipment contains a nickei-cadmium battery.

• The nickel-cadmium battery contained in this
equipment may expiode if disposed of in a fire.

• D o not short circuit the battery.

• D o not charge the nickel-cad mi urn battery used in

tiis equipment in any other charger other than the

one designed to charge this battery. Using another
charger may damage the battery, or cause the
battery to explode,

Uniden® is a rsgistered ¡radematk of Uniden
Corporation.

Fea fares, Specifications, and a\i’ai!abitity of Optional

Accessories are alt subject to change wthout notice.

_______

Introduction......................................2

Warning!

Table of Contents

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2

Feature Highlights

Unpacking

Optional Accessories...................3

Controls and Indicators
Getting Started

Charging the Battery

Mounting the Antenna

Installing the Belt Clip

Operation..........................................7

Simplex/Duplex Communication ...7

Low Battery Level Detection
Care and Maintenance

Replacing the Rechargeable

Battery
Troubleshooting

Service...........................................9

UHFCB Channel Information ...10

Specifications................................11

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UH-053

Introduction

Congratulations on your purchase of the
Sundowner UH-053. This 16-channel personal
UHF-CB 2-way radio represents a great value in
professional portable communications. You’ll find
that it provides reliable, consistent performance
for short-distance 2-way personal communications.

The Sundowner UH-053 is designed to operate
in simplex mode on CHI to CH16 or duplex
mode on CHI to CH8 where repeater service is
available.

Warning!

The Citizens Band Radio Communication
Service (CBRS) is under the jurisdiction of the
Australian Spectrum Management Agency

(SMA), Any adjustment or alteration which will
change the performance of the transceiver’s
original SMA type acceptance is STRICTLY

PROHIBITED, Replacement or substitution of

power or frequency determining components

e.g. Crystals, Transistors, ICs, Diodes, etc. with

other than those recommended by UNIDEN will

cause violation to the SMA type acceptance
technical requirement.

UH-053

Feature Highlights

• One — Watt Power — Reliable short range 2

■— way communication.

• Simplex/Duplex — Communication — Allows
the UH-053 to operate via a repeater station.

• 16 — Channei Capability — Uses any of the
first 16 Channels of the UHF CB Band,

• LED Message Indicators — instantly see when

the radio is transmitting, the channel is busy, or
the battery is low.

• Rechargeable Nickel — Cadmium Battery —

Eliminates the costly expense of frequently
purchasing replacement batteries.

• AC Adaptor/Charger — Use to charge/
recharge the Nickel — Cadmium battery.

• Speaker/Microphone Jacks — Plug in the
optional Remote Speaker/Microphone for

easier communications.

Unpacking

Carefully check the contents against this list:

• UH-053 16-Channel Personal UHF 2-Way
Radio

• Nickel-Cadmium Battery (installed in radio)

• Flexible Rubber Antenna

• Belt Clip

• AC Adaptor/Charger

• This Operating Guide (read carefully and
save)

If any items are missing or damaged, contact
your place of purchase immediately.

Optional Accessories

• Spare Battery — Replacement Recharge
able battery.

• Remote Speaker/Wlicrophone — Use the

UH-053 while clipped to your belt or on a
desk.

UH-053

Controls and Indicators

S P E A K E R /
M ICRO P H O N E C H A R C INO JA C K
JAC K

S Q U E L C H
C O N T R O L

A N T E N N A

C O N N E C TO R

S IM P LEXm U P L E X
S W ITCH

On-Off/Volume Control — Use to turn the

radio on or off, and to adjust the volume level.
Squelch Control — Use to eliminate background

noise (the "rushing" sound) heard between

transmissions,

Channel Selector — Rotate this knob to select
the desired channel,

Simplex/Duplex Switch — Selects Simplex or
Duplex. Communication on CHI to CHS.

Antenna Connector— Screw the flexible antenna
into this TNC-type connector.

Speaker/Microphone Jacks — Plug the optional
Remote Speaker/Micro phone.

Charging Jack — Plug the supplied AC Adaptor/
Charger into this jack to charge/recharge the
battery while in the UH-053.

- ONOFFAfO LUM E

C O N T R O L

- CHANN E L

S E LEC T O R

UH-053

PTT (Press-To-Talk) Switch — Press to transmit,
TX/BATT LO Indicator — This red LED lights

when you press the PTT switch to transmit. The
LED blinks when the battery is iow and needs
recharging.

BUSY Indicator — This amber LED lights when
the signai being received on the current channel
is strong enough to break squeich.

Built-in Microphone — Speak into here when
transmitting.

Buiit-in Speaker — Provides audio output when
receiving.

Getting Started

Charging the Battery

Before using the UH-053 for the first time, or
whenever the red ВАТТ LO indicator lights
showing the battery is iow, you shouid fuiiy
charge the unit.

UH-053

To charge the nickel-cadmium batteiy:

Using the AC Adaptor/Charger

1. Plug the AC adaptor/Charger into the Charging
Jack located on top of the unit.

WARNING! Use only the supplied AC
Adaptor/Charger. Any other AC Adaptor or
external power plug having over-voltage or
reversed polarity can cause overheating or

damage to the circuitry.

2. Plug the charger into a standard AC outlet.

To fully charge the battery, leave the Adaptor/
Charger connected for between 9 and 11

hours.

Note: Switch OFF the unit while the

battery is charging.

3. When charging is complete, disconnect the
Adaptor/Charger from the AC outlet, and from

the radio.

Mounting the Flexible Antenna

Place the end of the antenna onto the TNC

connector on top of the radio and turn clockwise

until tight.

Installing the Belt Clip

Place the Belt Clip slightly above the mounting
area on the back of the radio, and press
downward and in.

I

Ü

UH-053

Operation

Note: Before operating the UH-053 for the

first time, make sure you have fully
charged the battery.

1. Turn the UH-053 on by rotating the
On-OflA/olume Control clockwise until you
hear a click.

2. Adjust the Volume Control to a comfortable
level.

3. Turn the Squelch Control fully counter
clockwise. You will hear background noise,
and the BUSY Indicator will light. Turn the
Squelch Control just until the background

noise disappears and the BUSY Indicator

goes out. At this setting, the received signal

must be strong enough (>0,25pV) to break

squelch and be heard,

4. If the channel is clear, the BUSY Indicator will

be out, (If the BUSY Indicator is lit, the

channel is busy. Wait until the light goes out

before you begin transmitting.) Press the PTT
Switch to transmit. The TX Indicator lights to
indicate you are transmitting. Hold the built-in

microphone (or optional Spe^er/Microphone)
approximately two inches from your mouth
and speak dearly in a normal voice.

5. When you are through speaking, release the
PTT switch and listen for a reply. (The TX
Indicator goes out.)

6. When you are finished using the radio, be

sure to turn it off to conserve battery power.

Simplex/Duplex Communication

Duplex Operation allows the Sundowner
UH-053 to operate via a repeater station on
Channels 1 through 8. The set receives on these

channels but transmits 750 kHz higher than the

receiver frequency.

When the Simplex/Duplex switch is set to

Simplex position, the set receives and transmits
on the same channel. (Simplex Communication)

To use Duplex operation on a Channel where

Repeater Service is available, set the

Simplex/Duplex selector switch to "Duplex".

To put the Duplex channel back to normal

Simplex operation, set the Simplex/Duplex
Selector switch to "Simplex".

UH-053

Low Battery Level Detection

Uniden Sundowner UH-053 has a built-in
battery level detector circuit. It evaluates your
Battery Pack everytime you transmit to
determine whether the power inside the Battery
is still sufficient enough to support normal
Receive and Transmit communications.

When the PTT switch is pressed and the TX
LED blinks. It means the battery level is already
low and needs recharging. Under this condition,
the unit no longer transmits RF Power. Have
your battery charged fully or replaced by a fully
charged battery to resume normal operation.

Care and Maintenance

The UH-053 is designed to give you trouble-free

service. There are no user-serviceable parts
inside, and except for occasionally replacing the
rechargeable battery, no maintenance is
required.

Warning.' Uniden does not represent this unit

to be waterproof. Do not expose the unit to
moisture. Rain, dew, or other liquids may
damage the internal components.

Replacing the Rechargeable Battery

When it is time to install a new battery, use only
the one made for this radio. Any other type of
battery may damage your unit.

To replace the battery:

1. Remove the Belt Clip by lifting the tab and
carefully sliding upward and out.

2. Remove the battery compartment cover on
the back of the radio by pressing in and
sliding the cover down and off.

3. Remove the rechargeable nickel-cadmium
battery and replace with a new one. Be sure
the terminals on the battery match up with the
contacts in the radio.

4. Replace the battery compartment cover by
sliding it back into place until it clicks.

5. Replace the Belt Clip,

Note: Be sure to recharge the battery before

using the radio.

8

UH-053

Troubleshooting

Problem Suggestion

Unit does not power
on.

No reception or
poor reception.

No transmission.

Transmitting on any
channel between
CHI to CHS but the
receiving party can
not hear you.

Battery voltage is low.
Recharge, or replace
with a new one.

Adjust the squelch and
volume.

Antenna is not properly
connected.

Battery voltage is low.
Recharge, or replace
with a new one.

You may be out of
range of the receiving
party. Remember, this
radio is used only for
short distance
communication.

If you are using the
optional
Speaker/ M icrophone,
make sure it is properly
connected.

Maybe out of range of
the receiving party or if
not using a repeater
station check the Simplex/
Duplex Switch Setting
(should be set to
simplex)

Service

If your radio does not work properly, or if service
is necessary, contact your local Uniden dealer or
return the product In its original carton. If you are
shipping the item, enclose a description of the
problem along with a copy of the original
purchase receipt. Send the product to the
address listed in the Warranty (at the end of this
manual).

UH-053

UHF CB CHANNEL INFORMATION

Operating Mode

C H

1
2 476,450 47 6 ,45 0 4 76450 477,200
3 476,475 47 6 ,47 5 4 76.475 477 ,22 5
4 476.500 47 6 .50 0 4 76.500 477 .25 0
5 476.525 47 6 .52 5 4 76.525 477 .27 5
6 476.550 47 6 ,55 0 4 76.550 477 .30 0
7
8 476 .60 0 47 6 .60 0 4 76.600 477 ,350

9 476.625
10
11
12
13 476,725 47 6 ,72 5 476,725 476 .72 5
14
15 476.775 47 6 .77 5 476.775 476 .77 5
16 476,800 47 6 ,80 0 476,800 476 ,80 0

S IM P LEX D U P L E X

R X

(MHz)TX(MHz)

476.425 47 6 425 476.425 47 7 ,17 5

476.575 47 6 .57 5 4 76.575 477 ,32 5

476.625 47 6 .62 5 476.625

476.650 47 6 .65 0 4 76.650 476 .65 0

476.675 47 6 .67 5 4 76.675 476 .67 5

476.700 47 6 .70 0

476,750 47 6 .75 0 4 76,750 476 .75 0

R X

(MHz)TX(MHz)

476.700

476.700

Note: From Channel 9 to 16, irregardless of

SIMPLEX/DUPLEX Switch setting, the
transmit and receive frequency is the
same.

10

UH-053

Specifications

General

Channel: 16(PLL)
Frequency Range: Simplex 476.425 MHz to

Duplex (TX) 477.175 MHz to

Antenna Connector: TNCtype
Size: 150 mm{H) x

41 mm{D) x

63 mm(W)
Weight: 410 g
Speaker: 16il, 0.4W max
Microphone: Built-in Electret type
Approvals: SMAS250

476.800 MHz

477.350 MHz

Transmitter

Frequency
Tolerance at 25^=0:

Frequency Stability
O'C to +55°C:

Carrier Power 1 W
Spurious Emission -30 dBm (or Better)
Modulation

Frequency
Response
{1 kHz REF)
500 Hz:
2000 Hz:

Microphone
Sensitivity for +/-3
kHz Dev.

Maximum Deviation
(100 mV input)

Current Drain

±500 Hz (nominal)

±5 PPM

-6dB
+6 dB

5 mV

±4.7 kHz

550 mA

UH-053

11

Receiver

12 dB SINAD

Sensitivity;
Squelch Sensitivity

Threshold: 0.25)iV
Tight: 1 |iV

Audio Frequency
Response
(1 kHz REF)
500 Hz: +3 dB
2000 Hz: -6 dB

Adjacent Channel
Selectivity
(±25 kHz)

Image Rejection

(1st&2nd):

Hum & Noise Ratio

THD at Standard
Output Power:

Audio Output Power
at 10% THD:

Maximum Audio

Output Power:
Oscillator Dropout

Voltage;
Standby Current

Drain;
Current Drain at

Maximum Audio
Output:

Specifications shown are typical and sub

ject to change without notice.

0.25|jV

55 dB

40 dB
38 dB

3%

0.25 W

0.5 W

6 V (max.)

40 mA

250 mA

12 UH-053

WARRANTY

U n id e n Sund o w n e r U H -0 53

16-C h a n nel Personal UHF 2-W a y R a d io

A u stralian 1 Y e ar W a rra n ty

N o te: Please keep your sales docket as It provides evidence

of warranty,

W ftR RA N T D R : Uniden Australia Pty. Umlted ACN tX)1 865 498

E LEM E N T S OF W A R R A N T Y : Uniden warrants to the original

retail owner for the duration of this warr^ty, ifs Surrdowner UH­053 16-Channel Personal UHF 2-Way Radio (hereinafter re
ferred to as the Product), to be free from defects h materiats and
craftsmanship with only the limitations or exdusions set out below.

W A RR A N T Y DURA TIO N: This warranty to the original retail
owner only, shall terminate and be of no further effect ONE (1)
Year after the date ol original retail sale. This warranty will be
deemed Invalid If the product is; (A) Damaged or not main
tained as reasonable and necessary, (B) Modified, altered or

used as part ol any conversion kits, subassemblies, or any
configurations not sold by Uniden, (C) improperly installed, (D)

Repaired by someone other than an authorised Uniden Repair
Agent for a defect or malfunction covered by this warranty, (E)

Used in conjunction with any equipment or parts or as pari of a
system not manufactured by Uniden, (F) Installed, pro
grammed or serviced by anyone other than an authorized

Uniden Repair Agent. (G) Where the Serial Number label of

Ihe product has been removed or damaged beyond recogni
tion.

P A R T S COVER E D : This warranty covers for 1 year, the

Sundowner UH-053 16-Channel Personal UHF 2-Way Radio

Unit only. All accessories. NICAD Battery, AC Adaptor/Battery
Charger, Antenna, Belt Clip, are covered for 90 days

STATEMENT OF REMEDY: In the event that the product

does not conform to this warranty at any time while ttiis war

ranty is in effect, the warrantor at its discretion, will repair the

defect or replace the product and return it to you without

charge for parts and service.

THIS WARRANTY DOES NOT COVER OR PROVIDE FOR

THE REIMBURSEMENT OR PAYMENT OF INCIDENTAL

OR CONSEQUENTIAL DAMAGES.

W W 1R A N T Y CAR D : If a warranty card has been included

with this product then please till it in and return it to us within

14 days of purchase. Your name and serial number of the

product will then be registered in our database and this will

help us process your claim wiUi greater speed and efficiency

should you require warranty service.

P R O C E D U R E F O R O BTAIN ING PERFORM A N C E O F

W A RR A N T Y : In the event that the Product does not conform

to this warranty, the Product should be shipped o( delivered,

freight pre-paid, with evidence of original purchase, [eg/ a

copy of the sales docket), to the warrantor at:

U N IDEN A U S T R A LIA PTY. LIM ITED

345 Princes H ig h w a y , R o ckdale, NSW 22 1 6

P h (02) 5 9 9 3 1 0 0 F A X (0 2) 599 3278

Customers in other States should ship or deliver the Product

freight pre-paid to their nearest Uniden Authorized Repair Centre.

S E R V ICE D IVIS ION

(Contact Uniden tor the nearest Warranty Agent to you)

uníden

(jTZZOi^'¿Z Printed in Philippines