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Sheet 1

Page 6

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 manufacturer’s 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.

External monitor

PA speaker

Function

Remote receiver monitoring or 

substitution for internal speaker

Public address broadcasts

Impedance

8 Ohms

8 Ohms

Rating

7 Watts

7 Watts

Connect to

EXT.SP

. jack (

⅛-in/3.5 mm)

PA.SP.

 jack (

⅛-in/3.5 mm)

Notes

The internal speaker is disabled 

when an external speaker is 

connected.

You must have a PA speaker 

connected to use the PA 

feature.

Summary of Contents for PRO 520XL

Page 1: ...PRO 520XL Professional Mobile CB Radio UTZZ01363ZA 0 Printed in Vietnam...

Page 2: ...y 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 licen...

Page 3: ...u must use a CB antenna sold separately with this radio PARTS OF THE RADIO Front 1 PA Switch Activates the Public Address feature see Connecting external speakers 2 ANL Switch Activates the Automatic...

Page 4: ...ption 11 Channel Selector Selects which channel the radio will transmit or receive on Back 12 Model label Shows the model number FCC ID number and serial number 13 Antenna Connector Connects to a male...

Page 5: ...ower supplies with a POSITIVE ground connect the BLACK lead on the radio to the power supply s NEGATIVE pole and connect the RED lead to a neutral ground such as the chassis 3 Turn on your power suppl...

Page 6: ...ust 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...

Page 7: ...voice Release the button to listen for a response Using the PA feature 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 Ho...

Page 8: ...our vehicle s electrical system Poor reception 1 Adjust the squelch level 2 Check the antenna cable and connectors 3 Check operation mode of the radio Background noise 1 Turn on the automatic noise li...

Page 9: ...ass B amplitude modulation Freq Response 300 2500 Hz Output Impedance 50 ohms unbalanced Receiver Sensitivity 0 5 V for 10 dB S N N typical limit 1 0 V Selectivity 6 dB 7kHz 70 dB 10kHz typical Image...

Page 10: ...nty 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 reasonabl...

Page 11: ...structions in the owner s 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 orig...

Page 12: ......

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