Uniden PRO520E User Manual

unideiT

PRO520e

Professional

Mobile CB radio

INTRODUCTION

Welcome to the world of sophisticated,
state-of-the-art CB radio communic
ations. YourUniden PRO 520e represents
the most advanced mobile radio ever de
signed for use in the Citizens Band Radio
Service. It will operate on any of the 40 AM

WARNING

Before transmitting with your transceiver,
you must obtain a Department of Commu
nications (D.O. C.) Citizens Radio Licence.
Obtain an application form, from the
D.O.C. Before completing the form you
should read the conditions governing the
licensing and operation of the C.R.S.

frequencies authorized by the Department
of Communications. Your PRO 520e fea
tures a superheterodyne circuit with
PHASE LOCKED LOOP techniques to as
sure precise frequency control.

(D.O.C. brochure RB 249). This brochure
also can be obtained from the D. 0. C. After
completing the application form, mail it
with the appropriate fee to the Superin
tendant Regulatory of Licensing in the
State or territory in which the station will be
operated.

CONTROLS AND FUNCTIONS

1. ANL Switch - You can select the

Automatic Noise Limiter to help re
duce harsh background noise caused
by a variety of interference sources.

2. Instant CH 9 Switch - Use this

I switch to override the main channel

selector and instantly tune to the
emergency channel 9. Switch back
to return to normal 40 channel
operation.

3. TX LEO - An LED lights to indicate

when the radio is transmitting.

4. Microphone - The operational
mode of the CB is controlled by the
push-to-ta(k switch on the mic. Press
the switch to activate the transmitter
and disable the receiver. Release the
switch to enable the receiver and dis
able the transmitter. When transmit
ting, hold the mic about 2 inches from
your mouth and speak clearly in a
normal voice. The mic included with
the PRO 520e is a detachable ete­cfrei type.

5. S/RF Meter - This LED meter shows

the relative strength of the received
signal or the RF output.

6. Channel Indicator - Displays the

channel currently in use.

7. Channel Selector - This switch

selects the desired channel for trans

mission and reception. All channels,
except channel 9, may be used for
communications between stations
operating under different license.
Channel 9 has been reserved by the
D.OC.foremergency communications
involving the immediate safety of in

dividuals or the immediate protection

of property. Channel 9 also may be
used to render assistance to a motor
ist. This is aD.O.C.rule and applies to
all operators of CB radios.

8. RF Gain - This control is used to ad
just signal reception in areas where

strong signals are present. Turn the
control fully clockwise for maximum
reception.

9. Squelch - The Squelch control is

used to eliminate background noise
during the absence of a transmission.
Turn the control fully counter clock
wise, then slowly rotate it back, clock
wise until all noise disappears. At this
setting any transmission must be
slightly stronger than the background
noise to "Break Squelch" or to be
heard. Further clockwise rotation will
increase the threshold at which a sig
nal will be heard. You can select any
level to "Break Squelch".

10. Volume Control - Rotate clockwise
to turn radio on and to increase
volume.

1J. PA Switch - Select the Public Ad

dress mode when an external PA
speaker is connected. When the PA
mode is selected, the CB radio will be
disabled. Adjust the PA output level
by rotating the volume control.

Antenna Connector - This female con
nector permits connection of the trans
mission line cable male connector (PL-259)
to the transceiver.

Public Address - An external 8 ohm
7-watt speaker must be connected to the

"PA SP" jack located on the back of the
unit. The speaker must be directed away
from the mic to prevent feedback.

External Speaker - The external

speaker jack is used for remote receiver
monitoring. The external speaker should
have an 8 ohm impedance and be rated at

PR0 520e PA

CH9 TX

OPERATION

Operating Procedure to Receive

). Be sure that the power source, antenna

and microphone are properly
connected.

2. Turn the unit on by rotating the volume
control clockwise.

3. Set the channel selector switch to the
desired channel.

4. Set the volume control to a comfortable
listening level.

5. Listen to the background noise from
the speaker. Turn the squelch control

clockwise until the noise disappears (no
signal should be present). Leave the
control at this setting. The squelch is
now properly set. The receiver will re
main quiet until a signal is actually
received. Do not advance the control
too far, or some weaker signals will not
be heard.

Operating Procedure to Transmit

1. Be sure the operator has read and un
; derstands D. O.C. rules and regulations
\ prior to operating the fransm/fier.

least 7 watts. When an external speaker is
connected, the internal speaker is
disabled.

/ M /

i U

2. Select the desired channel for
transmission.

3. If the channel is clear, depress the push-

to-talk sv/itch on the side of the micro
phone and speak in a normal voice.

CAUTION: The transceiver Voltage
Standing Wave Ratio (VS.W.R.) measure
ment must be performed prior to the use
of the transmitter. A "VS.W.R." ratio in ex
cess of 2:1 may damage the transmitter.
Please check your SWR reading frequently
by using an SWR meter.

Preventjitive Maintenance

At six to twelve month intervals, the fol

lowing system checks should be made:

1. Check the Voltage Standing Wave
Ratio (VS.W.R.)

2. Inspect all electrical connections.

3. Inspect antenna coaxial cable for wear.

4. Inspect all screws and other mounting
hardware.

urMen

SPECIFICATIONS

Channels; 40 AM
Frequency Range: 26.965 to 27.405 MHz
Frequency Control:
Frequency Tolerance:
Operating Temp.: - 30“C to + 50“C
Microphone: Plug in DIN type: Electrer
Input Vbitage: 13.8 VDC nom. (+ or - ground)
Current Drain: TX:full mod., 1.7A

Size:
Weight: Hb. 10 oz.

Antenna Connector:

LED Meter: Indicates relative RF output and received signal

TRANSMITTER

Power Output: 4 watts
Modulation; A3E {АтрУЛибе Modulation)
Freq. Response: 300 - 2500 Hz
Output Impedance: 50 ohms, unbalanced

RECEIVER

Phase Locked Loop (PLL) synthesizer

±0.005%

RX: with max audio output, 1.7A
4 W W X 6 3/4" D X 1 ye" H

UHE SO-239

strength

Sensitivity: 0.5 M-V for lOdB; (S + N)/N typical (limit: I.O n,'
Selectivity;
Image Rejection:
I.F Frequency: Double Conversion Superheterodyne

RF Gain Control:

Automatic Gain Control:

Squelch:

Audio Output Power: 7 watts max. into 8 ohms

Freq. Response: 300 to 2000 Hz
Distortion: less than 10% at 4 watts, lOOOHz
Internal Speaker. 16 ohms, 3 watts round
External Speaker: (not supplied) 8 ohms
PA System:

Specifications and features are subject to change without notice.

6dB @ 7KHz, 70dB @ lOKHz epical
BO dB typical

1st 10.692 MHz

2nd 450 KHz
Adjustable for optimum reception
(AGC): less than lOdB change in audio output fo
from 10 to 50,000 microvolts

Adjustable; threshold less than I ^lV

7 watts in external 8 ohm speaker

TROUBLE SHOOTING

If your PRO 520e is not performing up to
your expectations, please try the following
troubleshooting steps after reading this
manual.

If you determine that service is necessary,

TROUBLE CHECK

Unit will not turn on.
No power

Poor reception

Weak transmission

Servicing Your CB

Technical information, diagrams and charts
will be provided upon request. It is the

user's responsibility to see that this radio is
operating at all times in accordance with

the D.O.C, Citizens Radio Service regu

lations. We highly recommend that you

1. Check power cord and all connections.

2. Check power cord fuse.

3. Check vehicle eiectrical system.

1. Check and adjust Squelch.

2. Check antenna system, cable, and connectors.

3. Check operation mode of the radio.

1. Check antenna system, cable, and connectors.

2. Check antenna grounding.

3. Check for corrosion on connectors.

contact your local dealerorpack the unit in
its original carton and send it along with a
brief, concise description of the problem,
yourname, address, phonenumber, anda
copy of the original purchase receipt to the

address listed in the warranty.

consult a qualified radiotelephone tech
nician for service and alignment of this
radio. When ordering parts, it is important
to specify the correct model number and
serial number of this radio.

Please refer to the WARNING information
on the first page of this manual.

INSTALLATION

Plan the location of the radio and micro
phone bracket before starting installation.
Select a location that is convenient for op
eration and does not interfere with the
driver or passenger in the vehicle. The
radio should be securely fastened to a
solid surface using the mounting bracket
and self-tapping screws which are
provided.

Mobile Antenna

Since the maximum allowable power out
put of the transceiver is limited by the
D.O.C.. theantenna is a very important fac
tor affecting transmission distance. It is for
this reason that we strongly recommend

that you install only a guality antenna in
your new C8 radio system. >bu have pur
chased a superior guality transceiver.

Don't diminish its performance by in
stalling an inferior antenna.

Only a properly matched antenna system
will allow maximum power transfer from
the 50-ohm transmission line to the radiat
ing element. We recommend that you use
an SWR meter when installing your an
tenna. Set your PRO 520e to channel 20

and make adjustments to the antenna un
til the meter reads as close to 1 as possible.
Vbur Uniden dealer is qualified to assist
you in the selection of the proper antenna
to meet your application requirements.

For automobile installation, the whip
antenna may be used with good effect.
The most efficient and practical installa
tion is a full quarter wave whip antenna
mounted on the rear deck or fender top,
midway between the rear window and
bumper.

A short "loaded" whip antenna is more
convenient to install on your automobile.

although the efficiency is less than a full
quarter wave whip antenna.

For marine installation, consult your dealer
for information regarding an adequate
grounding system and prevention of elec
trolysis between fittings on the hull and
water.

Connecting the Power Cord

With regard to the connection of the
power cords, it may be possible or de
sirable to connect the red lead [for nega
tive ground systems) or the black lead (for
positive ground systems) to the ignition
switch accessory terminal so that the radio
is automatically turned off when the ig
nition switch (key) is turned off.

Alternately, the power lead may be con

nected to an available terminal on the fuse
block or even to a point in the wiring
harness. Care must be taken, however, to
guard against a short circuit condition
When in doubt, please contact your ve
hicle dealer for specific information about
your vehicle.

Ground Information

Most newer cars and small trucks use a ne
gative ground system, while some older
cars and some newer larger trucks may
use a positive ground system. A negative
ground system is generally identified by
the ” battery terminal being connected
to the vehicle motor block, but if you can
not determine the polarity of your vehicle,
consult your vehicle dealer for information.

NOTE: This radio may be installed and
used in any 12-volt DC negative or posi
tive ground system.

Negative Ground System

If you are operating on a negative ground
system, connect the red DC power cord
from the radio to the positive " -i- " battery
terminal or other convenient point and
connect the black power lead to the chas
sis or vehicle frame, or the negative
terminal of the battery.

WARRANTY

TWO YEAR LIMITED WARRANTY

WARRANTOR. UNIDEN AUSTRALIA PTY. L TD. 345
Princes Highway, Rockdale, N.S. W. 2216 ("UNIDEN").
ELEMENTS OF WARRANTY. UNIDEN warrants, for
the duration of this warranty, its UNIDEN CB Product
to be free from defects in materials and craftsmanship
with only the limitation or exclusions set out below.

WARRANTY DURATION. This Warranty shall termin

ate and be of no further effect Two (2) years after the
date of original purchase of the Product or at the time
the Product is (a) damaged or not maintained as rea
sonable and necessary, (b) modified, (c) improperly
installed, fd) is repaired by someone other Warrantor
for a defect or malfunction covered by this Warranty,
or (e) used in a manner or purpose for which the Pro
duct

was not intended.

PARTS COVERED. This Warranty covers at! compo
nents of the Products,
S 7A TEMENT OF REMED Y. In the event that the Pro
duct does not conform to this Warranty at any time
white this Warranty is effective. Warrantor will repair
the defect and return it to you prepaid, without charge
for parts, service, or any other costs incurred by

uniden*

Australia Pty. Ltd

HEAD OFFICE:

Phone [phone]

Fax; [phone]

UTUA01317CB(SK)

34S Princes Highway, Rockdale,

BRISBANE

3/12 Randall Street,
Slacks Creek,
Old 4127
Phone 107] 290-1 188
Fax [phone]SI

MELBOURNE B TASMANIA

446-44B Bell Street.
East Preston,
VIC. 3072
Phone [phone]
Fax [phone]

© Copyright 1989 Uniden Corporation

Positive Ground System

If you are operating on a positive ground
system, connect the black DC power cord
from the radio to the negative " — " bat
tery terminal or other convenient point
and connect the red power lead to the
chassis or vehicle frame, or the positive
" " terminal of the battery.

Warrantor or its representatives in connection with

the performance of this Warranty. In addition, if the
Product contains a defect or malfunction which is not
repaired after a reasonable number of attempts by

Warrantor to repair the Product, the Productor defec
tive component will at our discretion, be replaced

without charge, when the defective product is deliv
ered to the warrantor at 345 Princes Highway, Rock
dale, N.S. W. 2216 free and dear of all liens and en
cumbrances. Please note that while the Product will
be remedied under this Warranty without charge.

THIS WARRANTY DOES NOT COVER OR PROVIDE
FOR THE REIMBURSEMENT OR PA YMENTOF INCID
ENTAL OP CONSEQUENTIAL DAMAGES.
PROCEDURE FOR OBTAINING PERFORMANCE OF

WARRANTY. In the event that the Product does not
conform to this Warranty, the Product should be
shipped prepaid, to Warrantor at 345 Princes High

way, Rockdale, N.S. W. 2216. THE ORIGINAL OR COPY
OF THE SALES RECEIPT OR OTHER VALID EVIDENCE
OF THE DATE OF THE ORIGINAL PURCHASE MUST
ACCOMPANY THIS PRODUCT.

N.S.W. 2216

PEfTTH

23 Geddes Street,
Salcatta,
W A. 6021
Phone (09] 344-3937
Fax (09] 349 8165

ADELAIDE

72-74 Halifax Street,
Adelaide
S.A. 5000
Phone (08] 223-4235
Fax (08] 223 1471

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