Uniden PRO 500D - Manual (Page 3)

Controls and Functions
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1. BuilMn ANL Circuitry — Help reduce h?rsh background noise caused by a
variety of interference sources.
TX LED — An LED lights to indicate when the radio is transmitting.
Microphone - The operational mode of the CB is controlled bythepush-to-
talk switch on the mic. Press the switch to activate the transmitter and disable
the receiver Release the switch to enable the receiver and disable the trans­
mitter. When transmitting, hold the mic about 2 inches from your mouth and
speak clearly in a normal voice. The mic included with the PRO 500D is a de­
tachable electret type.
4. S/KF METER — This LED meter shows the relative strength of the received
signal or the RE output.
5. Channel Indicator — Displays the channel currently in use.
6. Channel Selector — This switch selects the desired channel for transmission
and reception. All channels, except channel 9, may be used for communic­
ations between stations operating under different license. Channel 9 has
been reserved by the D.O.C. for emergency communications involving the im­
mediate safety of individuals or the immediateprotectionofproperty. Channel
9 also may be used to render assistance to a motorist. This is a D.O.C. rule and
applies to all operators of CB radios.
7. SQUELCH - The Squelch control is used to eliminate background noise dur­
ing the absence of a transmission. Turn the control fully counter clockwise,
then slowly rotate it back, clockwise 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 signal will be heard. You can select any level to "Break
Squelch"
8. Volume Control — Rotate clockwise to turn radio on and to increase volume.
Antenna Connector - This female connector permits connection of the trans­
mission line cable male connector (PL-259) to the transceiver.