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Contents
Description.........................................................................................................1
Elimination of Licensing....................................................................................1
Emergency Operation .......................................................................................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
Weather Information .........................................................................................7
To Transmit........................................................................................................8
Multi-Function Meter .........................................................................................8
Preventive Maintenance ....................................................................................9
Maintenance.......................................................................................................9
Troubleshooting...............................................................................................10
Servicing Your Transceiver .............................................................................10
Radio Code Definitions ...................................................................................11
Specifications ...................................................................................................12
Two-Year Extended Warranty.........................................................................13
Unpacking
Carefully unpack your PC78 Elite and check the contents against this list:
■ PC78 Elite CB 2-way mobile radio
■ Microphone
■ Mounting Bracket Kit
■ DC Power Cord
■ Reference Guide
■ Part 95 Subpart D (FCC Rules)
■ 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.
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Description
Your Uniden PC78 Elite 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 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 certification, 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 certification requirements in Part 2 of the rules.
Elimination of Licensing
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.
Features, Specifications, and availability of Optional
Accessories are subject to change without notice.
Emergency Operation
1. Set the switch to CH9 or turn Channel Selector knob to Channel 9.
2. Press the microphone PTT switch 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 communication 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.
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Controls and Functions
FRONT VIEW - PC78 Elite 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. DELTA TUNE: Fine tunes the receiver.
7. SWR: Calibrates the meter for Standing Wave Ratio
(SWR) measurements.
8. Weather Channel Knob: Selects weather channel.
9. Channel Knob: Selects channel.
10. Channel Display: Displays current channel selection.
11. RX/TX Indicator: Red-transmitting; green-receiving.
12. ANT: Indicates a high SWR condition in antenna system. Check
antenna, cable and connections.
13. Dynamic Squelch Control (DSC): Automatically sets Squelch to
optimal level for stronger signals.
14. CH9/OFF: Turns Channel 9 on or off.
15. BRT/DIM: Adjusts the brightness of LED.
16. NB/ANL: Reduces external noise and interference from vehicle
ignition systems.
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17. CB/WX/PA: Selects PA (Public Address) WX (Weather Radio) or CB.
Do not use PA function unless an external
speaker is connected.
18. S/RF/SWR/ CAL: Selects meter function. S/RF- normal;
SWR and CAL are for SWR measurements only. See page 8 for
calibration procedures.
19. Multi-function Meter: Measures SWR, RF and S signal strength.
REAR VIEW
20. POWER: Connects DC power to transceiver.
21. EXT. SP.: Connects optional 8-ohm 4-watt speaker to remotely
monitor receiver.
When the external speaker is plugged in, the
internal speaker is off.
22. PA SP.: Connects external 8-ohm, 4-watt speaker.
To prevent acoustic feedback, separate the
microphone from the speaker when operating
the PA at high output levels.
23. ANT.: Connects antenna cable to transceiver.
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Installation
MOBILE STATION INSTALLATION
Plan the location of the transceiver and
microphone bracket before beginning installation.
1. Select a location that is convenient for operating the radio, but does
not interfere with the driver or passenger.
2. Install bracket with self-tapping screws provided.
3. Connect wiring. (See instructions for Connecting the Power Cords.)
4. Attach the microphone bracket to the side of the radio.
5. Attach radio to bracket.
MOBILE STATION ANTENNA
Because the maximum power output of the transmitter is limited by the FCC,
the quality of your antenna is very important. To achieve the maximum
transmission distance, we strongly recommend that you install only a high
quality antenna. You have just purchased a superior transceiver - don’t
diminish its performance by installing an inferior antenna.
Only a properly matched antenna system will allow maximum power transfer
from the 50 ohm transmission line to the radiating element.Your Uniden
dealer is qualified to help you select the proper antenna for your
requirements. A whip style antenna may be used for
automobile installation.
A short ‘loaded’ whip antenna is easier to install on
an automobile. However, the efficiency of the short
whip antenna is less than that of a full quarter-wave
whip antenna.
MARINE INSTALLATION
Consult your dealer for information regarding marine installation. It is
important to adequately ground the system and to prevent electrolysis
between the fittings in the hull and the water.
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CONNECTING THE POWER CORDS
We recommend connecting the power lead to the Ignition Switch Accessory
Terminal. This way, the transceiver is automatically turned off when the
ignition switch is turned off.
Or, the power cord may be connected to an available terminal on the fuse
block, or, to a point in the wiring harness. However, caution must be taken to
prevent a short circuit. If in doubt, contact your vehicle dealer for information.
This transceiver may be installed and used in any 12-volt DC
negative or positive ground system vehicle.
GROUND INFORMATION
Most newer U.S. and foreign made cars, and small trucks, use a negative
ground system. Some older cars, and some new large trucks, use a positive
ground system.
With a negative ground system, the negative (-) battery terminal is usually
connected to the vehicle motor block. If you cannot determine the polarity
system of your vehicle, contact your vehicle dealer for information.
Negative Ground System
If you have a negative ground system,
connect the red DC power cord from
the transceiver to the positive (+) battery
terminal or other convenient point.
Then connect the black power cord to
the vehicle chassis or negative (-) battery
terminal.
Positive Ground System
If you have a positive ground
system,connect the black DC power
cord from the transceiver to the negative
(-) battery terminal or other convenient
point. Then, connect the red power
cord to the vehicle chassis or the
positive (+) battery terminal.
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To Receive
Be sure that the power source, antenna, and microphone
are properly connected before proceeding.
1. Turn unit ON and set
VOLUME Control to a
comfortable level.
2. Select CHANNEL.
3. Set switch to NB/ANL.
Dynamic Squelch Control automatically sets Squelch to the optimal level
for stronger transmission and signal clarity. To scan for weaker signals,turn
Dynamic Squelch Control off and perform the following steps:
4a. Turn SQUELCH fully clockwise so
only strong signals can get through.
4b. Turn SQUELCH fully counter
clockwise until you hear a hiss.
Everything gets through - noise,
weaksignals, and strong signals.
4c. Turn SQUELCH back clockwise until
the hiss stops. Only clearer signals get
through.
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Set SQUELCH only when
the radio is not receiving
a strong signal.
5. Adjust RF GAIN knob (small) to
optimize reception in strong signal
areas.
6. Adjust DELTA knob (small) to
reduce or eliminate adjacent
channel interference.
7. Set meter switch to S/RF.
Weather Information
Your PC78 Elite combines a CB Radio with a Weather Radio and a
Weather Alert System. The Weather Radio continually broadcasts weather
conditions. The Weather Alert System sounds a seven-second signal in the
event of severe weather.
To configure your CB radio to receive weather
alerts while using your CB radio:
1. Set the switch to WX.
2. Turn the Weather Channel knob to the
channel with best reception.
Left at this setting, you will hear only weather
broadcasts and Weather Alert Signals.
To use your CB radio normally while monitoring for
weather alerts, set the switch to CB.
When you hear a Weather Alert Signal, and desire to
hear weather information, return the switch to WX.
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To Transmit
Perform a voltage Standing Wave Ratio (SWR) measurement
prior to using the transmitter. A SWR ratio in excess of 2:1 may
damage the transmitter.
Be sure to read and understand Part 95, FCC Rules and
Regulations before operating your transmitter.
1. Select a channel.
2. Adjust MIC GAIN.
3. When the channel is clear, press the
microphone PTT switch and speak.
Multi-Function Meter
SWR Meter: Measures SWR (standing wave ratio) of antenna. Use to check
antenna system or to adjust your antenna to the proper length.
To measure SWR:
1. Position meter switch
to CAL.
2. Press and hold
microphone PTT
switch. (Transmit)
3. Calibrate meter with
SWR knob by adjusting the
needle to the ▼ mark.
4. Move the meter switch to the
SWR position while pressing the
microphone PTT switch.
5. Release the PTT switch.
A reading following two is acceptable. Higher readings indicate a problem in
the antenna system. Problems may be caused by humidity, vibration, or
corrosion. Check both ends of the coaxial cable connector. Also check for
damage to the cable or antenna.
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RF Meter: Measures RF Output Power for transmitter. To use, position
the meter switch at S/RF. Press microphone PTT switch to read
transmitting power.
S-Meter: Measures incoming signal strength. To use, position the meter
switch at S/RF. The meter swings to indicate signal strength.
i.e. S 3, S 5, S 7 . . .
Preventive Maintenance
Every
1.
2.
3.
4.
six months:
Check the Standing Wave Ratio (SWR).
Be sure all electrical connections are tight.
Inspect antenna coaxial cable for wear or breaks in shielding.
Be sure all screws and mounting hard ware are tight.
Maintenance
The PC78 Elite is designed to give you years of trouble-free service. There
are no user-serviceable parts inside. Except for the fuse in the DC power
cord, no maintenance is required.
To replace a blown fuse:
1. Press ends of the fuse holder
together. Twist to open.
Carefully separate the two pieces.
2. Remove the fuse and inspect.
If blown, replace with the same
type fuse.
Use only the fuse specified for your PC78 Elite.
Failure to do so may void your warranty.
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Troubleshooting
Problem
Unit does not power up
No reception
Poor Reception
No Transmission
Low Transmission
❑
❑
❑
❑
❑
❑
❑
❑
❑
❑
❑
❑
❑
❑
❑
❑
❑
❑
❑
Suggestion
Check the ignition key position.
Check power cord connections.
Check fuse.
Check vehicle electrical system.
Check microphone connection.
Set CB/WX/PA switch to CB.
Check VOLUME and SQUELCH.
Check antenna.
Check antenna connection.
Set RF GAIN to MAX.
Check VOLUME and SQUELCH.
Be sure antenna SWR is normal.
Set RF GAIN to MAX.
Check and adjust DELTA TUNE.
Set CB/WX/PA switch to CB.
Check microphone connection.
Check MIC GAIN and adjust to MAX.
Be sure antenna SWR is normal.
Check MIC GAIN and adjust to MAX.
If you do not get satisfactory results after performing the above checks,
call the Uniden Customer Service Center at 1-800-297-1023, 8:00 a.m. to
5:00 p.m. CST, Monday through Friday.
Servicing Your Transceiver
Technical information, diagrams, and charts are provided on request. It is the
user’s responsibility to see that this radio is operating at all times in
accordance with the FCC Citizens Radio Service regulations. We highly
recommend that you consult a qualified radio/telephone technician for
servicing and aligning this CB radio product. Please read the Warning
information on page 1 of this Guide.
When ordering parts, be sure to specify the correct
model number and serial number of the unit.
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Radio Code Definitions
The following list contains common “10-Codes” used by CB radio
operators for faster communication and better understanding.
Code
10-1
10-2
10-3
10-4
10-5
10-6
10-7
10-8
10-9
10-10
10-11
10-12
10-13
10-16
10-17
10-18
10-19
10-20
10-21
10-22
10-23
10-24
10-25
10-26
10-27
10-28
10-29
10-30
10-32
10-33
10-34
Meaning
Code
Received poorly
Receiving well
Stop transmitting
OK, message received
Relay message
Busy, stand by
Out of service, leaving air
In service, subject to call
Repeat message
Transmission completed,
standing by
Talking too rapidly
Visitors present
Advise Weather/
Road conditions
Make pickup at
Urgent business
Anything for us?
Nothing for you, return
to base
My location is
Call by telephone
Report in person to
Stand by
Completed last assignment
Can you contact
Disregard last information
I am moving to channel
Identify your station
Time is up for contact
Does not conform to
FCC rules
I will give you a
radio check
EMERGENCY TRAFFIC
Trouble at this station
10-35
10-36
10-37
10-38
10-39
10-41
10-42
10-43
10-44
10-45
10-50
10-60
10-62
10-63
10-64
10-65
10-67
10-70
10-71
10-77
10-81
10-82
10-84
10-85
10-91
10-93
10-94
10-99
10-200
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Meaning
Confidential information
Correct time is
Wrecker needed at
Ambulance needed at
Your message is delivered
Please turn to channel
Traffic accident at
Traffic tie up at
I have a message for you
All units within range
please report
Break channel
What is next
message number
Unable to copy, use phone
Net directed to
Net clear
Awaiting your next
message/assignment
All units comply
Fire at
Proceed with transmission
in sequence
Negative contact
Reserve hotel room for
Reserve room for
My telephone number is
My address is
Talk closer to microphone
Check my frequency on
this channel
Please give me a
long count
Mission completed, all
units secure
Police needed at
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Specifications
General
Channels:
CB Frequency Range:
Weather Frequency Range:
Frequency Control:
Frequency Tolerance:
Operating Temperature:
Microphone:
Input Voltage:
Current Drain:
Size:
Weight:
Antenna Connector:
Meter:
40
26.965 to 27.405 MHz
162.400MHz (WX CH1)
162.425MHz (WX CH2)
162.450MHz (WX CH3)
162.475MHz (WX CH4)
162.500MHz (WX CH5)
162.525MHz (WX CH6)
162.550MHz (WX CH7)
Phase Locked Loop (PLL) synthesizer
±0.002%
-30˚C to +60˚C (CB)
-10˚C to +60˚C (WX)
-10˚C to +60˚C (DSC on)
Plug-in type; 600 ohms dynamic
13.8 VDC nominal (positive or negative ground)
TX: AM full modulation, 2.2 A (max.)
RX: Squelched, 0.4 A; with maximum audio output,
1.2A (nominal)
7-9/32” W x 8-57/64” D x 2-13/64” H
4 lbs. 3 oz. with microphone
UHF, SQ-239
Illuminated; indicates relative power output and received
signal strength SWR.
Transmitter
Power Output:
Modulation:
Frequency Response:
Output Impedance:
4 watts
High- and low-level, Class B amplitude modulation
300 to 3000 Hz
50 ohm, unbalanced
Receiver
Sensitivity:
Selectivity:
Image Rejection:
Adjacent-Ch. Rejection:
IF Frequencies: Double Conversion:
Automatic Gain Control (AGC):
RF Gain Control:
Delta Tune Range:
Noise Blanker:
Squelch:
Audio Output Power:
Frequency Response:
Distortion:
Internal Speaker:
External Speaker:
(not supplied)
Less than 1 µV for 10 dB, (S+N)/N
6 dB @ 7 kHz, 60 dB; @10 kHz
80 dB typical
60 dB typical
1st: 10,695 MHz; 2nd: 455 kHz
Less than 10 dB change in audio output for inputs from
10 to 50,000 µV
Adjustable for optimum signal reception
±1.5 kHz, continuously adjustable
RF type
Adjustable; threshold less than 1 µV
4 watts
300 to 3000 Hz
Less than 7% at 3 watts, 1000 Hz
16 ohms, round
8 ohms, disables internal speaker when connected
PA System
Power Output:
External Speaker for PA
speaker:
(not supplied)
4 watts into external speaker
8 ohms when CB/PA switch is in PA. The PA
also monitors the receiver; separate jack provided.
Specifications shown are typical and subject to change without notification.
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Two-Year Extended Warranty
Important: Evidence of original purchase is required for warranty service.
WARRANTOR: UNIDEN AMERICA CORPORATION (“Uniden”)
ELEMENTS OF WARRANTY: Uniden warrants, for two years, to the original retail
owner, this Uniden Product to be free from defects in materials and craftsmanship
with only the limitations or exclusions set out below.
WARRANTY DURATION: This warranty to the original user shall terminate and
be of no further effect two years after the date of original retail sale. The warranty
is invalid if the Product is (A) damaged or not maintained as reasonable or
necessary, (B) modified, altered, or used as part of any conversion kits,
subassemblies, or any configurations not sold by Uniden, (C) improperly installed,
(D) serviced or repaired by someone other than an authorized Uniden service
center for a defect or malfunction covered by this warranty, (E) used in any
conjunction with equipment or parts or as part of any system not manufactured
by Uniden, or (F) installed or programmed by anyone other than as detailed by
the owner’s manual for this product.
STATEMENT OF REMEDY: In the event that the product does not conform to
this warranty at any time while this warranty is in effect, warrantor will either, at
its option, repair or replace the defective unit and return it to you without charge
for parts, service, or any other cost (except shipping and handling) incurred by
warrantor or its representatives in connection with the performance of this
warranty. Warrantor, at its option, may replace the unit with a new or refurbished
unit. THE LIMITED WARRANTY SET FORTH ABOVE IS THE SOLE AND ENTIRE
WARRANTY PERTAINING TO THE PRODUCT AND IS IN LIEU OF AND
EXCLUDES ALL OTHER WARRANTIES OF ANY NATURE WHATSOEVER,
WHETHER EXPRESS, IMPLIED OR ARISING BY OPERATION OF LAW,
INCLUDING, BUT NOT LIMITED TO ANY IMPLIED WARRANTIES OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. THIS
WARRANTY DOES NOT COVER OR PROVIDE FOR THE REIMBURSEMENT OR
PAYMENT OF INCIDENTAL OR CONSEQUENTIAL DAMAGES. Some states do not
allow this exclusion or limitation of incidental or consequential damages so the
above limitation or exclusion may not apply to you.
LEGAL REMEDIES: This warranty gives you specific legal rights, and you may
also have other rights which vary from state to state. This warranty is void outside
the United States of America.
PROCEDURE FOR OBTAINING PERFORMANCE OF WARRANTY: If, after
following the instructions 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 originally packaged with the
Product. Include evidence of original purchase and a note describing the defect
that has caused you to return it. The Product should be shipped freight prepaid,
by traceable means, to warrantor at:
Uniden America Corporation
Parts and Service Division
4700 Amon Carter Blvd
Fort Worth, TX 76155
(800) 297-1023, 8 a.m. to 5 p.m., Central,
Monday through Friday
13
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