Uniden PC78XL Owner's Manual

COVER

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Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

Elimination of Licensing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

Controls and Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

Mobile Station Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

Mobile Station Antenna . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

Marine Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

Connecting the Power Cords . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

Ground Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

Negative Ground System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

Positive Ground System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

To Receive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

To Transmit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

Multi-Function Meter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

Preventive Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

Servicing Your Transceiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

Radio Code Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

Two-Year Extended Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

Carefully unpack your PC78XL and check the contents against this list:

n

PC78XL CB 2-way mobile radio

n

Microphone

n

Mounting Bracket Kit

n

DC Power Cord

n

Reference Guide

n

Part 95 Subpart D (FCC Rules)

n

Product Registration Card

If any items are missing or damaged, contact your place of purchase immediately.

Please be sure to complete and mail your

Product Registration Card.

UUnnppaacckkiinngg

CCoonntteennttss

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Your Uniden PC78XL represents the highest quality communications device
designed for use in the Citizens Band Radio Service. It will operate on any of the
40 AM frequencies authorized by the Federal Communications Commission (FCC).

The FCC has ruled that CB Radio Service operators are no longer required to
obtain an FCC License to operate their CB equipment. In doing so, the FCC also
decided to permit CB station operation without station identification.

Elimination of individual station licenses does not reduce the operating
privileges or responsibilities of CB users. An operator of a CB radio station is still
required to comply with the Communications Act and with the rules of Citizens
Band Radio Service

.

Uniden is a registered trademark of Uniden America Corporation.

1. Set the switch to

CH9

or turn Channel Selector knob to Channel 9.

2. Press

PTT

switch on microphone and speak clearly.

3. If there is no response, select an active channel and ask that party to

relay your emergency broadcast on Channel 9.

All channels, except Channel 9 may be used for normal
communication. Channel 9 is reserved by the FCC for
emergency communications involving the immediate safety of
individuals or protection of property. Channel 9 may also be
used to render assistance to a motorist.

This is an FCC rule and applies to all operators of CB radios.

EEmmeerrggeennccyy OOppeerraattiioonn

Features, Specifications, and availability of Optional
Accessories are all subject to change without notice.

EElliimmiinnaattiioonn ooff LLiicceennssiinngg

The Citizens Band Radio Service is under the jurisdiction of the
Federal Communications Commission (FCC). Any adjustments or
alterations which would alter the performance of the transceiver's
original FCC type acceptance, or which would change the
frequency determining method, are strictly prohibited.
Replacement or substitution of crystal, transistors, ICs, regulator
diodes, or any other part of a unique nature, with parts other than
those recommend by Uniden, may cause violations of the
technical regulations in Part 95 of the FCC Rules or in violation of
type acceptance requirements in Part 2 of the rules.

DDeessccrriippttiioonn

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FRONT VIEW - PC78XL BACKLIGHTED PANEL

1.

Microphone Jack

2.

ON/OFF -VOLUME

: Turns radio on or off; adjusts speaker volume.

3.

SQUELCH

: Reduces background noise when there is no

incoming signal.

4.

RF GAIN

: Improves reception in strong signal areas.

5.

MIC GAIN

: Adjusts microphone sensitivity.

6.

DEL TA TUNE

: Fine tunes the receiver.

7.

SWR CAL

: Calibrates the meter for Standing Wave Ratio

(

SWR

) measurements.

8.

Channel

Knob: Selects channel.

9.

Channel

Display: Displays current channel selection.

10.

RX/TX

Indicator: Red-transmitting; green-receiving.

11.

ANT

: Indicates a high SWR condition in antenna system. Check

antenna, cable and connections.

12.

Dynamic Squelch Control (DSC)

: Automatically sets Squelch to

optimal level for stronger signals.

13.

CH9/OFF

: Turns Channel 9 on or off.

14.

BRT/DIM

: Adjusts the brightness of LED Channel Display and

Indicator and RF Signal Meter.

15.

CB/PA

Switch: Selects PA(Public Address) or CB.

Do not use PA function unless an
external speaker is connected.

CCoonnttrroollss aanndd FFuunnccttiioonnss

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16.

NB/ANL-ANL/OFF

: Reduces external noise and interference from

vehicle ignition systems.

17.

S/RF-SWR/CAL

: Selects meter function.

S/RF

- normal;

SWR

and

CAL

are for SWR measurements only. See page 8 for calibration

procedures.

18.

Multi-function Meter

: Measures

SWR, RF

and Ssignal strength.

REAR VIEW

19.

POWER

: Connects DC power to transceiver.

20.

EXT. SP

.: Connects optional 8-ohm 4-watt speaker to remotely

monitor receiver.

21.

PA SP

.: Connects external 8-ohm, 4-watt speaker to use as public

address system.

22.

ANT.

: Connects antenna cable to transceiver.

To prevent acoustic feedback, separate the
microphone from the speaker when operating
the PA at high output levels.

When the external speaker is plugged in, the
internal speaker is off.

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