PRO 520XL Professional Mobile CB Radio
Printed in China. UTZZ01363EZ(0)

INTRODUCTION

Welcome to the world of Citizens Band radio communications. Your Uniden radio is an advanced mobile radio designed for use in the Citizens Band (CB) Radio Service. It will operate on any of the 40 AM frequencies authorized by the Federal Communications Commission (FCC). Your Radio features a superheterodyne circuit with PHASE LOCKED LOOP techniques to assure precise frequency control.

WARNING

This radio has been type accepted and certified by the FCC for CB Radio Service operation. Any adjustments or alterations which might alter the performance of the transceiver or the method of determining frequency are strictly prohibited. If you replace or substitute any unique parts (including crystals, transistors, ICs, regulator diodes, etc.) with parts other than those recommended by Uniden, you may be in violation of FCC technical regulations (in Part 95) or type acceptance requirements (in Part 2) of the FCC rules.

CB license requirement

U.S. users no longer need to apply for a license to use a CB radio. However, CB radio is still considered a license by rule service. This means that, while the FCC permits CB station operation without station identification, station operators are still required to comply with the Communications Act and with the rules of CB Radio Service. (For more information on U.S. radio rules, visit the FCC website at www.fcc.gov.)
Uniden contact information
You can get answers 24/7 at our website: www.uniden.com. If You need a part or accessory need special assistance due to a disability Contact Unidens Parts Department* Accessibility Help Line Phone 800-297-1023 800-554-3988 800-874-9314 (voice or TTY)
have a question or problem Customer Care Line*
*During regular business hours, Central Standard Time. Visit our website for detailed business hours.

INCLUDED IN YOUR PACKAGE

If any of these items are missing or damaged, immediately contact your place of purchase or Unidens Parts Department.

PA ANL CH9

RF GAIN

PRO520 XL Mobile radio

Microphone and hook
Mounting bracket, knobs, and mounting hardware
Other printed materials NOTE: You must use a CB antenna (sold separately) with this radio.

PARTS OF THE RADIO

1. PA Switch Activates the Public 520 PA ANL CH9 Address feature (see RF GAIN Connecting external speakers). 2. ANL Switch 10 Activates the Automatic Noise Limiter feature, which reduces background noise from the car engine and other sources. Move this switch up to turn on the ANL feature. 3. CH9 Switch Switches the radio over to channel 9.
4. TX LED Indicates when the radio is transmitting. 5. S/RF (Signal/RF) Meter Shows the strength of the received signal or the RF output. 6. Channel Indicator Displays the channel currently in use. 7. Microphone Jack Connects to the included detachable electret microphone. 8. Volume Control Powers on the radio and adjusts the volume. 9 Squelch knob Adjusts the level at which the radio squelches or suppresses weak radio signals. 10.RF Gain Knob Adjusts the level of the signal reception. 11.Channel Selector Selects which channel the radio will transmit or receive on.
12.Model label Shows the model MODEL: PRO510XL FCC ID number, FCC ID number and serial SERIAL NO: number. 13.Antenna Connector Connects to a male PL-259 external antenna cable (antenna sold separately). 14.PA Speaker Jack See Connecting external speakers, below. 15.External Speaker Jack See Connecting external speakers, below. 16.12 Volt DC Power Cord 17.Fuse casing

Microphone

18 Push-to-talk (PTT) button NOTE: Make sure you have read and understood part 95 of the FCC rules and regulations before using the transmitter.

INSTALLATION

Connect the microphone
Align the microphone connector with the jack on the front of the radio. Push the connector in firmly and secure it with the locking screw.

Connect the power

You can connect the radio to any standard 12 volt DC power source, with either a positive or negative ground. If you dont know whether your power supply uses a positive or negative ground, consult the manual for your power supply or contact the manufacturer. WARNING! DO NOT connect this equipment to a power supply if you are not absolutely certain of the grounding type! 1) Make sure your power supply is turned off. 2) For power supplies with a NEGATIVE ground, connect the RED lead on the radio to the power supplys POSITIVE (+) pole, and connect the BLACK lead to the power supplys NEGATIVE () pole or to a neutral ground such as the chassis. OR For power supplies with a POSITIVE ground, connect the BLACK lead on the radio to the power supplys NEGATIVE () pole, and connect the RED lead to a neutral ground such as the chassis. 3) Turn on your power supply. 4) Turn the radios Volume knob clockwise to power on the radio.

Installing the mounting bracket
When choosing the location for the radios mounting bracket, keep the following things in mind: Pick a location that does not block your view, interfere with your vehicles controls, or hinder your driving. Make sure the radio and microphone are not in front of an airbag. Pick a solid surface that can support the weight of the bracket and the radio. Make sure theres enough room. (You may want to put the radio in the bracket when youre choosing where to install the bracket.) Once you choose the location, use the included, self-tapping screws to attach the mounting bracket and the microphone bracket to your vehicle (you dont have to drill holes). Slide the radio into the bracket and use the included knobs to hold it at the preferred angle.
Connecting an external antenna
WARNING! The antenna used for this radio must be installed at least 8 inches (20 cm) away from all persons. The antenna must not be collocated or used with any other antenna or transmitter. CAUTION: Never operate your radio with no antenna or with a damaged antenna cable. This can damage the radio. You will need to purchase an antenna to operate the radio. There are two basic types of mobile CB antennas--full-length whips and loaded whips--with a wide variety of mounts to suit different vehicle locations. Choose an antenna that matches the specifications of this radio. Follow the manufacturers installation instructions carefully. Tune your antenna using a Standing-Wave Ratio (SWR) meter: set the radio to channel 20, and adjust the antenna until the SWR is as close as 1:1 as possible. CAUTION: Make sure the SWR is less than 2:1 before using the radio. An SWR higher than 2:1 can damage the transmitter. Your Uniden dealer can help you select the antenna that is best for your needs. Consult the specifications in the back of this manual for detailed transmitter and antenna information.
Connecting external speakers
Your radio supports two external speakers for remote monitoring and public address features. External speakers are sold separately. To prevent feedback, direct all speakers away from the microphone. Function Impedance Rating Connect to Notes External monitor Remote receiver monitoring or substitution for internal speaker 8 Ohms 7 Watts EXT.SP. jack (-in/3.5 mm) The internal speaker is disabled when an external speaker is connected. PA speaker Public address broadcasts 8 Ohms 7 Watts PA.SP. jack (-in/3.5 mm) You must have a PA speaker connected to use the PA feature.
OPERATION AND MAINTENANCE

NOTE: FCC rules reserve Channel 9 for motorist assistance and other emergency communications. Channel 9 should only be used in situations where there is immediate danger to the safety of individuals or the protection of property.
Make sure you read and understood part 95 of the FCC rules and regulations before using the transmitter. Turning the radio on Turning the radio off Selecting a channel Changing the volume Transmitting Turn the Volume knob clockwise until the display backlight comes on. Turn the Volume knob counter-clockwise until it clicks and the display backlight turns off. Turn the Channel knob clockwise to move up the channel list. Turn it counter-clockwise to move down the channel list. Turn the Volume knob clockwise to increase the volume; turn it counter-clockwise to decrease the volume. Tune the radio to the channel you want to transmit on, and listen to make sure the channel is clear. Press and hold the PTT button. Hold the microphone about 2 inches away from your mouth and speak in a normal voice. Release the button to listen for a response. Move the PA switch up; this turns off the CB radio and activates the PA speaker. On the microphone, press and hold the PTT button. Hold the microphone about 2 inches away from your mouth and speak in a normal voice. Use the Volume knob to adjust the volume of the PA speaker. When youre finished broadcasting, release the button and move the PA switch back down. To filter out weaker signals and background noise, turn the knob clockwise to increase the squelch level. To decrease the squelch level so you can hear weaker radio signals, turn the knob counter-clockwise. Turn the knob clockwise to boost the reception of weak signals, or counter-clockwise to reduce the reception of strong signals. In areas where strong signals cause noise and distortion, reduce the RF gain (turn the knob counter-clockwise). In areas where weaker signals are difficult to hear, increase the RF gain (turn the knob clockwise). Move the CH9 switch up; the radio automatically tunes to channel 9 and disables the channel selector. Move the switch back down to return to the previous channel and enable the channel selector.

Using the PA feature

Adjusting the squelch level
Adjusting the RF gain Using the Instant Channel 9 feature

Maintenance

Every six to twelve months, check to make sure that. The Voltage Standing Wave Ratio (VSWR) is less than 2:1. All electrical connections are secure and free of corrosion. The antenna cable shows no wear or damage. All mounting screws are securely fastened. 4. Inspect all screws and other mounting hardware.

TROUBLESHOOTING

If your radio is not performing to your expectations, please try these simple steps. If these steps dont solve your problem, call the Uniden Customer Service Center. Problem: Things to try: and all connections. Radio wont turn 1. Check the radios power cordpower cord. 2. Check the fuse in the radios on (no power) 3. Check your vehicles electrical system. 1. Adjust the squelch level. Poor reception 2. Check the antenna, cable and connectors. 3. Check operation mode of the radio. Turn on the automatic noise limiter. Background noise 1. Adjust the squelch level. 2. 1. Check the antenna, cable and connectors. Weak 2. Check the antenna grounding. transmission 3. Check for corrosion on the connectors.
Service and repair information
Technical information, diagrams and charts will be provided upon request. Service, repair, or alignment should only be attempted by a qualified and/or licensed radio technician. When ordering parts, it is important to specify the correct model number of this radio. It is the users responsibility to make sure the radio is operating in accordance with the FCC Citizens Radio Service regulations at all times.

SPECIFICATIONS

General
Channels Frequency Range Frequency Control Frequency Tolerance Operating Temperature Microphone Input Voltage Current Drain Size Weight Antenna Connector LED Meter 40 AM 26.965 to 27.405 MHz Phase Locked Loop (PLL) synthesizer 0.005% -30C to +50C Plug in type, dynamic 13.8 V DC nom. (+ or - ground) TX full mod., 1.7A RX with max. audio output, 1.7A 4-1/2 W x 6-3/4 D x 1-3/8 H 1 lb. 10 oz. UHF, SO-239 Indicates relative RF output and received signal strength 4 Watts Class B amplitude modulation 300-2500 Hz 50 ohms, unbalanced

Transmitter

Power Output Modulation Freq. Response Output Impedance Sensitivity Selectivity Image Rejection I.F. Frequency

Receiver

0.5V for 10 dB; (S + N) /N typical (limit 1.0V) 6 dB @ 7kHz, 70 dB @ 10kHz typical 80 dB typical Double Conversion Superheterodyne 1st 10.692 MHz 2nd 450 kHz RF Gain Control Adjustable for optimum reception Automatic Gain Control less than 10dB change in audio output for inputs from 10 (AGC) to 50,000 microvolts Squelch Adjustable; threshold less than1V Audio Output Power 7 watts max. into 8 ohms Freq. Response 300 to 2000 Hz Distortion less than 10% at 4 watts, 1000Hz Internal Speaker 16 ohms, 3 watts round Specifications and features are subject to change without notice.

TWO-YEAR LIMITED WARRANTY
WARRANTOR: UNIDEN AMERICA CORPORATION (Uniden) ELEMENTS OF WARRANTY: Uniden warrants, for two years, to the original retail owner, this Uniden Product to be free from defects in materials and craftsmanship with only the limitations or exclusions set out below. WARRANTY DURATION: This warranty to the original user shall terminate and be of no further effect 24 months after the date of original retail sale. The warranty is invalid if the Product is (A) damaged or not maintained as reasonable or necessary, (B) modified, altered, or used as part of any conversion kits, subassemblies, or any configurations not sold by Uniden, (C) improperly installed, (D) serviced or repaired by someone other than an authorized Uniden service center for a defect or malfunction covered by this warranty, (E) used in any conjunction with equipment or parts or as part of any system not manufactured by Uniden, or (F) installed or programmed by anyone other than as detailed by the owners manual for this product. STATEMENT OF REMEDY: In the event that the product does not conform to this warranty at any time while this warranty is in effect, warrantor will either, at its option, repair or replace the defective unit and return it to you without charge for parts, service, or any other cost (except shipping and handling) incurred by warrantor or its representatives in connection with the performance of this warranty. Warrantor, at its option, may replace the unit with a new or refurbished unit. THE LIMITED WARRANTY SET FORTH ABOVE IS THE SOLE AND ENTIRE WARRANTY PERTAINING TO THE PRODUCT AND IS IN LIEU OF AND EXCLUDES ALL OTHER WARRANTIES OF ANY NATURE WHATSOEVER, WHETHER EXPRESS, IMPLIED OR ARISING BY OPERATION OF LAW, INCLUDING, BUT NOT LIMITED TO ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. THIS WARRANTY DOES NOT COVER OR PROVIDE FOR THE REIMBURSEMENT OR PAYMENT OF INCIDENTAL OR CONSEQUENTIAL DAMAGES. Some states do not allow this exclusion or limitation of incidental or consequential damages so the above limitation or exclusion may not apply to you. LEGAL REMEDIES: This warranty gives you specific legal rights, and you may also have other rights which vary from state to state. This warranty is void outside the United States of America. PROCEDURE FOR OBTAINING PERFORMANCE OF WARRANTY: If, after following the instructions in the owners manual you are certain that the Product is defective, pack the Product carefully (preferably in its original packaging). The Product should include all parts and accessories originally packaged with the Product. Include evidence of original purchase and a note describing the defect that has caused you to return it. The product should be shipped freight prepaid, by traceable means, to warrantor at: Uniden America Corporation Parts and Service Division 4700 Amon Carter Blvd Fort Worth, TX 76155