Uniden PRO 500D User Manual

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PRO 500d

Professional

Mobile CB radio

Introduction

Welcome to the world of sophisticated, state-of-the-art CB radio communi
cations. Your Un/den PRO 500D represents the most advanced mobile radio ever
designed for use in the Citizens Band Radio Service. It will operate on any of the 40
AM frequencies authorized by the Department of Communications. Your PRO
500D features a superheterodyne circuit with PHASE LOCKED LOOP techniques
to assure precise frequency control. This radio has been type accepted and certifi
ed by the DOC.

Warning

Before transmitting with your transceiver, you must obtain a Department of Com
munications (D.O.C.) Citizens Radio Licence. Obtain an application form, from
the D.O.C. Before completing the form you should read the conditions governing
the licensing and operation of the C.R.S. (D.O.C. brochure RB 14). This brochure
also can be obtained from the D.O.C. After completing the application form, mail
it with the appropriate fee to the Superintendant Regulatory of Licensing in the
State or territory in which the station will be operated.

Connecting the Power Cords

With regard to the connection of the power cords, it may be possible or desirable
to connect the red lead (for negative ground systems) or the black lead (for positive
ground systems) to the ignition switch accessory terminal so that the radio is auto

matically turned off when the ignition switch (key) is turned off.

Aiternately, the power lead may be connected to an available terminal on the fuse

block or even to a point in the wiring harness. Care must be taken, however, to

guard against a short circuit condition. When in doubt, please contact your vehi

cle dealer for specific information about your vehicle.

Controls and Functions

1. BuilMn ANL Circuitry — Help reduce h?rsh background noise caused by a
variety of interference sources.

2.

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

3.

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.