Uniden PRO520XL manual Controls AN, Channel Indicator Displays the channel currently in use

1.PA Switch - Select the Public Address 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.

2.ANL Switch - You can select the Automatic Noise Limiter to help reduce harsh background noise caused by a variety of interference sources.

3.Instant CH 9 Switch - Use this switch to override the main channel selector and instantly tune to the emergency channel 9. Switch back to return to normal 40 channel operation.

4.TX LED - An LED lights to indicate when the radio is transmitting.

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 transmission 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 FCC for emergency communications involving the immediate safety of individuals or the immediate protection of property. Channel 9 also may be used to render assistance to a motorist. This is a FCC rule and applies to all operators of CB radios.

8.RF Gain - This control is used to adjust the signal reception in areas where strong signals are present. Turn the control clockwise for maximum reception.

CONTROLS AN

9.Squelch - The squelch control is used to eliminate background noise during the absence of a transmission. Turn the control fully counterclockwise, then slowly rotate it back clockwise until the 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 signal will be heard. You can select any level to “Break Squelch.”

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

the volume.

11.Microphone Jack- The operational mode of the CB is controlled by the push-to-talk switch on the microphone. Press the switch to activate the transmitter and disable the receiver. Release the switch to enable the receiver and disable the transmitter. When transmitting, hold the microphone about 2 inches from your mouth and speak clearly in a normal voice. The microphone included with the

PRO 520XL is detachable electret type.

Antenna Connector - This female connector 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 least 7 watts. When an external speaker is connected, the internal speaker is disabled.