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Popular Uniden PC78XL Manual Pages
English Owners Manual - Page 2
...-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
Unpacking
Carefully unpack your PC78XL and check the contents against this list: s PC78XL CB 2-way mobile radio s Microphone s Mounting Bracket Kit s DC Power Cord s Reference Guide s Part 95 Subpart D (FCC Rules...
English Owners Manual - Page 3
... Uniden, may cause violations of the technical regulations in Part 95 of the FCC Rules or in violation of type acceptance requirements in the Citizens Band Radio Service. Elimination of Optional Accessories are all operators of Citizens Band Radio Service. Press PTT switch on any other part of a unique nature, with the rules of CB radios.
1
Replacement...
English Owners Manual - Page 4
... Display and
Indicator and RF Signal Meter. 15. pc78xl.qxd 2/25/99 10:09 AM Page 2
Controls and Functions
FRONT VIEW - SWR CAL: Calibrates the meter for stronger signals. 13. SQUELCH: Reduces background noise when there is connected.
2 Dynamic Squelch Control (DSC): Automatically sets Squelch to
optimal level for Standing Wave Ratio...
English Owners Manual - Page 5
S/RF - SWR and CAL are for calibration procedures.
18. POWER: Connects DC power to remotely
monitor receiver. S/RF-SWR/CAL: Selects meter function.
REAR VIEW 19....OFF: Reduces external noise and interference from the speaker when operating the PA at high output levels.
22. EXT. pc78xl.qxd 2/25/99 10:09 AM Page 3
16. When the external speaker is plugged in, the internal speaker...
English Owners Manual - Page 6
.... A short 'loaded' whip antenna is less than that you select the proper antenna for your dealer for Connecting the Power Cords). 4.
To achieve the maximum transmission distance, we strongly recommend that of the transceiver and microphone bracket before beginning installation.
1. Your Uniden dealer is important to adequately ground the system and to help you...
English Owners Manual - Page 7
... a negative ground system, the negative (-) battery terminal is turned off.
and foreign made cars, and small trucks, use a positive ground system. However, caution must be installed and used in the wiring harness. pc78xl.qxd 2/25/99 10:09 AM Page 5
CONNECTING THE POWER CORDS
We recommend connecting the power lead to prevent a short circuit.
English Owners Manual - Page 8
pc78xl.qxd 2/25/99 10:09 AM Page 6
To Receive
Be sure that the power source, antenna, and microphone are properly connected before proceeding. 1. Select CHANNEL.
3. Set switch to a comfortable level.
2. Turn SQUELCH back clockwise until you hear a hiss.
Only clearer signals get through.
4b. Set SQUELCH only when the radio is not receiving a strong...
English Owners Manual - Page 9
A SWR ratio in strong signal areas.
6. Adjust MIC GAIN.
3. Select channel. 2. Set meter switch to S/RF
To Transmit
Perform a voltage Standing Wave Ratio (SWR) measurement prior to reduce or eliminate adjacent channel interference.
7. pc78xl.qxd 2/25/99 10:09 AM Page 7
5. Adjust DELTA TUNE knob to using the transmitter. When the channel is clear...
English Owners Manual - Page 10
... meter switch
to the cable or antenna. Higher readings indicate a problem in the antenna system. Press microphone PTT switch to the SWR position while pressing the microphone PTT switch. S-Meter: Measures incoming signal strength. Move the meter switch to read transmitting power. pc78xl.qxd 2/25/99 10:09 AM Page 8
Multi-Function Meter...
English Owners Manual - Page 11
... of trouble-free service. If blown, replace with the same type fuse. Be sure all screws and mounting hardware are tight. Be sure all electrical connections are no maintenance is designed to give you years of the fuse holder together. Maintenance
The PC78XL is required. Except for wear or breaks in the DC power cord, no user-serviceable parts...
English Owners Manual - Page 12
... electrical system. u Check MIC GAIN and adjust to MAX. to CB.
u Set CB/PA switch to 5:00 p.m. u Check MIC GAIN and adjust to specify the correct model number and serial number of this Guide. pc78xl.qxd 2/25/99 10:09 AM Page 10
Troubleshooting
Problem Unit does not power up
No reception
Poor Reception
No Transmission Low Transmission
Suggestion...
English Owners Manual - Page 13
... by Out of service, leaving air In service, subject to microphone 10-93 Check my frequency on
this station
Code
Meaning
10-35 ... to FCC rules I will give you a radio check EMERGENCY TRAFFIC Trouble at this channel 10-94 Please give me a
long count 10-...by CB radio operators for us? pc78xl.qxd 2/25/99 10:09 AM Page 11
Radio Code Definitions
The following list contains common "10-Codes" ...
English Owners Manual - Page 14
...modulation, 2.2A (max.) RX: Squelched, 0.3A; indicates relative power output and received signal strength. separate jack provided.
with microphone UHF, SQ-239 Illuminated; pc78xl.qxd 2/25/99 10:09 AM Page 12
Specifications...Delta Tune Range: Noise Blanker: Squelch: Audio Output Power: Frequency Response: Distortion: Internal Speaker: External Speaker:
(not supplied)
PA System
Power ...
English Owners Manual - Page 15
... REMEDIES: This warranty gives you specific legal rights, and you may not apply to you without charge for parts, service, or any system not manufactured by Uniden, or (F) installed or programmed by anyone other cost (except shipping and handling) incurred by warrantor or its original packaging). THE LIMITED WARRANTY SET FORTH ABOVE IS THE SOLE AND...
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