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Sheet 2

Page 7

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

Turn the 

Volume

 knob clockwise until the display backlight comes on.

Turning the 

radio off

Turn the 

Volume

 knob counter-clockwise until it clicks and the display 

backlight turns off. 

Selecting a 

channel

Turn the 

Channel

 knob clockwise to move up the channel list. Turn it 

counter-clockwise to move down the channel list.

Changing the 

volume

Turn the 

Volume

 knob clockwise to increase the volume; turn it 

counter-clockwise to decrease the volume.

Transmitting

 

– 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. 

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. 

 

– 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 you’re finished broadcasting, release the button and move the 

PA

 switch back down.

Adjusting the 

squelch level

 

– 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.

Adjusting the 

RF gain

 

– 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).

Using the 

Instant  

Channel 9 

feature

 

– 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.

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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