Uniden Bearcat 880 CHR User manual

Owner’s Manual
Printed in Vietnam
U01UT399AZA(0)
®880 CHR

CONTENTS
SAFETY NOTICE .......................................................................... 5
UNPACKING ................................................................................ 5
DESCRIPTION ............................................................................. 5
EMERGENCY OPERATION ......................................................... 6
CONTROLS AND FUNCTIONS.................................................... 6
INSTALLATION............................................................................ 8
MOBILE INSTALLATION .............................................................................. 8
Mobile Antenna........................................................................................... 9
Connecting the Power Cords ...................................................................... 9
Ground Information ................................................................................... 9
INSTALL 6-PIN TO 4-PIN ADAPTER ........................................................... 10
MARINE INSTALLATION ............................................................................. 10
USING YOUR BEARCAT 880CHR.............................................. 10
CB MODE...................................................................................................... 10
BASIC SETTINGS......................................................................................... 10
ALL CHANNEL SCAN................................................................................... 11
WEATHER MODE (WX MODE) .................................................................... 11
Set Weather Scan Mode ............................................................................ 12
Set Weather Alert Mode............................................................................ 12
MEMORY Mode.......................................................................................... 12
Save Channels Into Memory ..................................................................... 13
Scan Channels in Memory ........................................................................ 13
Listen to Channels in Memory .................................................................. 13
Clear Channels from Memory................................................................... 13
MENUS ......................................................................................................... 13
Select Backlight Color............................................................................... 14
Set LCD Contrast ....................................................................................... 14
Set Brightness ........................................................................................... 14
Diagnostic Menus ..................................................................................... 15
EXIT Menu.................................................................................................. 16
OTHER FEATURES ....................................................................................... 16

Uniden is a registered trademark of Uniden America Corporation.
Bearcat is a registered trademark of Uniden America Corporation.
Features, specications, and availability of optional accessories are all subject to
change without notice.
S/RF/CAL/SWR Meter ................................................................................ 16
Calibrate Standing Wave Ratio (SWR) ..................................................... 16
PREVENTIVE MAINTENANCE .................................................. 17
MAINTENANCE ......................................................................... 17
TROUBLESHOOTING ............................................................... 17
SERVICING YOUR TRANSCEIVER ........................................... 18
SPECIFICATIONS....................................................................... 19
FCC PART 15/IC COMPLIANCE ................................................ 20
FCC PART 15 COMPLIANCE........................................................................ 20
IC COMPLIANCE .......................................................................................... 21
ONE-YEAR LIMITED WARRANTY ............................................ 21
RADIO CODE DEFINITIONS ..................................................... 23

5
SAFETY NOTICE
The antenna used for this radio must be properly installed and
maintained and must provide a separation distance of at least 16.92
inches (43 cm) from all persons and must not be collocated or operated
in conjunction with any other antenna or transmitter. Never transmit if
any person is closer than the specified distance to the antenna.
Note that Uniden does not specify or supply any antenna with this
transceiver. While a 0 dBi gain antenna is normal for a typical installation,
the above limit applies to any antenna with up to 3 dBi gain.
UNPACKING
Your Bearcat 880CHR contains the following:
Bearcat 880CHR CB 2-way mobile radio
Microphone
Mounting Bracket Kit
DC Power Cord
6-pin to 4-pin microphone adapter
Owner’s Manual
Part 95 Subpart D (FCC Rules)
If any items are missing or damaged, contact your place of purchase
immediately.
DESCRIPTION
Your Uniden Bearcat 880CHR 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 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,

6
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.
EMERGENCY OPERATION
1. Press 9/19/NORM or turn Channel Selector knob to Channel 9.
2. Press PTT 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. The FCC
reserves Channel 9 for emergencies involving the immediate safety of individuals
or protection of property. Use Channel 9 to render assistance to a motorist.
This is an FCC rule and applies to all CB radio operators.
CONTROLS AND FUNCTIONS
1 42 5 6
7151413 111098 12
3
16
1. Volume Control knob with Power On/O. Turn the knob
clockwise until it clicks to turn power on or counterclockwise until
it clicks to turn power o.
2. SQUELCH knob: Reduces background noise when there is no
incoming signal.
3. S/RF/CAL/SWR Meter: Displays Send/Receive signal strength, RF
Power, and SWR reading.
4. Channel Number display.
5. Operation buttons and associated LEDs:
Talkback: Talkback lets you monitor yourself when transmitting.
Press Talkback to activate the function (LED = on). With Talkback
active, press PTT and adjust the volume with the Channel Selec-
tor/MENU/OK knob. (Levels 00 - 15)

7
MIC Gain: Adjusts microphone sensitivity. Delivers up to 100%
modulation. With MIC Gain active, press PTT and adjust the gain
levels with the Channel Selector/MENU/OK knob. (Levels 00 - 04)
If Talkback is on when MIC Gain is also on, Talkback volume increases.
Weather: Press to toggle between Weather and CB channels. Turn
Channel Selector to cycle through the 7 weather channels. (LED
o = CB channels; LED on = Weather channels)
Press and hold to turn Weather Alert on and o. ALERT displays.
Day/Night: Adjusts LCD backlight sensitivity between Day and
Night modes. (LED o = Day; LED on = Night)
6. Channel Selector/MENU/OK. Press the inner MENU/OK button to
select a menu option or other selection. Turn the outer Channel
Selector knob to:
Select channels
Select menu modes
Change scan resume direction (up or down)
Control Talkback volume
Control Mic gain level
Control Calibration volume
All channels except Channel 9 may be used for normal communication. The FCC
reserves Channel 9 for emergencies involving the immediate safety of individuals
or protection of property. Use Channel 9 to render assistance to a motorist.
This is an FCC rule and applies to all CB operators.
7. Microphone socket.
8. Indicators turn on when the function is turned on.
9. S/RF/CAL/SWR: Push to to check RF signal strength, calibration,
and SWR reading.
10. CB/PA: Selects CB (Citizens Band) or PA (Public Address).
Do not use the PA function unless an external speaker is connected.
11. MEM/SCAN: Press to start or stop scanning modes [All Channel
Scan (see page 11) and Memory Scan (see page 13)]. Press
and hold to set or clear channel memory while in Memory mode.

8
12. 9/19/NORM: Press to switch between emergency channel 9,
channel 19, and standard CB channels.
13. Frequency Display: Displays the MHz of the selected channel. Also
displays menu options.
14. ANL: Turns ANL (Automatic Noise Limiter) feature on and o.
ANL reduces external noise.
15. NB: Turns NB (Noise Blanker) feature on and o. NB reduces
interference from vehicle ignition systems.
16. RF Gain knob: Improves reception in strong signal areas.
17 18 19
20
21
22
17. Antenna socket: Connects antenna to the unit.
18. PA SP: Connects optional external 8-ohm, 4-watt speaker for use
as a public address system.
To prevent acoustic feedback, separate the microphone from the speaker when
operating the PA at high output levels.
19. EXT. SP: Connects an 8-ohm 4-watt speaker to remotely monitor
the receiver.
When the external speaker is plugged in, the internal speaker is o.
20. POWER: Connects DC power to transceiver.
21. Fuse.
22. PTT: Push-to-Talk.
INSTALLATION
MOBILE 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

9
does not interfere with the driver or passenger.
2. Install bracket with self-tapping screws provided.
3. Connect power cords (see page 9).
4. Attach the microphone bracket to side of the radio.
5. Attach radio to bracket.
Mobile 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, Uniden strongly recommends 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, but its
efficiency is less than that of a full quarter-wave whip antenna.
Connecting the Power Cords
Uniden recommends 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.
As an alternative, 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.

10
Ground Information
This transceiver may be installed and used in any 12-volt DC negative ground
system vehicle.
Negative Ground System
With a negative ground system, the negative (-) battery terminal is
usually connected to the vehicle motor block.
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.
INSTALL 6-PIN TO 4-PIN ADAPTER
The Bearcat 880CHR is pre-configured for Uniden’s 6-pin wireless, noise-
cancelling technology. Your Bearcat 880CHR comes with an adapter
to connect the radio’s 6-pin microphone to a current standard 4-pin
microphone.
1. Insert the 6-pin side of the adapter into the Bearcat 880CHR 6-pin
microphone connection.
2. Plug a standard 4-pin microphone connector into the 4-pin side
of the adapter.
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.
USING YOUR BEARCAT 880CHR
CB MODE
Be sure that the power source, antenna, and microphone are properly connected
before proceeding.
BASIC SETTINGS
1. Turn unit on. Set volume to a comfortable level.

11
2. Select channel.
3. Set noise limitations as desired (ANL/NB).
4. Adjust Squelch.
• Turn SQUELCH fully clockwise so only strong signals can get
through.
• Turn SQUELCH fully counterclockwise until you hear a hiss.
Everything gets through - noise, weak signals, and strong signals
• Turn SQUELCH back clockwise until the hiss stops. Only clearer
signals get through.
Set SQUELCH only when the radio is not receiving a strong signal.
5. Turn RF Gain to set RF gain sensitivity.
6. Press MIC Gain to toggle microphone sensitivity between High
and Low. (LED on = High; LED o = Low)
7. Set Backlight color (see page 14).
8. Set LCD Contrast (see page 14).
9. Set Brightness (see page 14).
ALL CHANNEL SCAN
When All Channel Scan is on, the radio scans channels until it receives
a signal. It will move to the next channel if no signal is received after 3
seconds.
1. Press MEM/SCAN once if in CB mode (twice if in Memory mode).
SCAN displays.
2. The radio begins scanning upward through the channels.
• To skip the channel the radio has stopped on, turn Channel
Selector clockwise to move to the next channel or counter-
clockwise to move to the previous channel. The radio continues
scanning in the selected direction.
• To change to Memory Channel Scan mode, press MEM/SCAN
while in All Channel Scan mode (see page 13).
3. To exit All Channel Scan mode, press PTT, 9/19/NORM, WEATHER,
or CB/PA.

12
WEATHER MODE (WX MODE)
Your radio combines a CB radio with a Weather radio and a Weather Alert
system. The Weather Alert system sounds a seven-second signal in the
event of severe weather when you are in CB mode. The Weather radio
continually broadcasts weather conditions when you are in Weather
mode.
1. Press WEATHER. Your radio is now in Weather radio mode.
2. Select 1 of 7 weather channels using Channel Selector.
You cannot change ANL or NB settings while in WX mode. The radio will sound an
alert tone.
Set Weather Scan Mode
Weather Scan mode allows the radio to move to the next weather
channel if no signal is detected after 3 seconds. Set Weather Scan mode
to ON or OFF through the menus.
1. Press MENU/OK to activate the menus. COLOR displays.
2. Turn the Channel Selector knob to cycle through the menu op-
tions until WXSCAN displays.
3. Press MENU/OK. ON displays.
4. Press MENU/OK to set Weather Scan mode to ON or turn the se-
lection knob until OFF displays and then press MENU/OK to set it.
WXSCAN displays again.
If Weather Scan is ON when you turn o the radio, it remains ON.
Left at these settings (WX mode, WX Scan), you will hear only weather
broadcasts and Weather Alert signals. To use your CB radio normally
while monitoring weather alerts, press WEATHER again.
Set Weather Alert Mode
Weather Alert mode only operates when you are in CB mode; it does not
operate in Weather mode. In CB mode, the radio sounds an alert tone
when it detects a 1050Hz tone on a weather channel.

13
Press and hold WEATHER to turn Weather Alert on. The WEATHER LED
turns on.
MEMORY MODE
You can select channels to store into memory and then scan only those
channels.
Save Channels Into Memory
1. Tune to a channel in CB mode.
2. Press and hold MEM/SCAN until SAVE appears (about 2 seconds).
3. Release MEM/SCAN.
4. The radio stays on the saved channel.
Scan Channels in Memory
1. From All Channel Scan mode (see page 11), press MEM/SCAN until
MEM SCAN displays; the radio scans memory channels only.
2. Press MEM/SCAN again to return to Memory mode or the last
channel scanned.
Listen to Channels in Memory
1. Press MEM/SCAN until MEM displays.
2. Turn the Channel Selector knob and only saved channels will be
heard.
Clear Channels from Memory
1. In Memory mode, select a channel.
2. Press and hold MEM/SCAN until CLEAR displays.
3. Release MEM/SCAN. The radio plays the next channel in memory.
MENUS
Access menus by pressing MENU/OK. The first menu, COLOR, displays.
Turn the Channel Selector knob to cycle through the other menus:
COLOR - Backlight color
CONT - LCD Contrast
BRIGHT - Brightness
WXSCAN - Weather Scan mode

14
DIAG - Diagnostics
– Battery Check
– Antenna Mismatch Check
– RF Power Check
Exit
Select Backlight Color
1. Press MENU/OK to activate the menus. Turn Channel Selector
until COLOR displays.
2. Press MENU/OK. Turn Channel Selector until DAY displays.
3. Press MENU/OK. DAY blinks.
4. Turn Channel Selector to cycle through the available backlight
colors or OFF. The selection number for that color displays in that
color. The available colors are:
Option
No: Color Option No: Color
0 None (O) 4 Red
1 Blue 5 Magenta
2 Green 6 Yellow
3Cyan 7 White
5. Press MENU/OK to select that color. COLOR displays.
6. Repeat these procedures to set the NIGHT backlight color.
Set LCD Contrast
1. Press MENU/OK to activate the menus. Turn Channel Selector
until CONT displays.
2. Press MENU/OK. Turn Channel Selector until DAY displays.
3. Press MENU/OK. DAY blinks.
4. Turn Channel Selector to cycle through the contrast options.
(Lowest = 00; Highest = 15)
5. Press MENU/OK to select the one you want. CONT displays again.
6. Repeat these procedures to set the NIGHT contrast level.
Set Brightness
1. Press MENU/OK to activate the menus. Turn Channel Selector
until BRIGHT displays.

15
2. Press MENU/OK. DAY displays.
3. Press MENU/OK. DAY blinks.
4. Turn Channel Selector to cycle through the brightness options.
(Lowest = 00; Highest = 15)
5. Press MENU/OK to select the one you want. BRIGHT displays again.
6. Repeat these procedures to set the NIGHT brightness level.
Diagnostic Menus
1. Press MENU/OK to activate the menus.
2. Turn Channel Selector until DIAG displays.
3. Press MENU/OK to enter the DIAG level.
From the DIAG level, you can check battery power levels, RF power
levels, and antenna mismatch.
Battery Check
Check the DC power levels if you feel your radio is not performing
properly.
1. Once DIAG displays, press MENU/OK; VOLT displays.
2. Press MENU/OK; the battery voltage displays for 2 seconds and
then the battery voltage condition displays:
– PASS - Voltage is good.
– FAILLO - Voltage is too low.
– FAILHI - Voltage is too high.
3. Press MENU/OK to return to the DIAG level.
RF Power Check
RF alerts indicate that the transmission levels are not acceptable.
1. Once DIAG displays, press MENU/OK; VOLT displays.
2. Turn Channel Selector until RF OUT displays.
3. Press MENU/OK. GO PTT displays.
4. Press and hold PTT. The RF power condition, PASS or FAIL,
displays. (If FAIL displays, refer to the Troubleshooting section,
page 18.)
5. Release PTT: GO PTT displays.
6. Press MENU/OK to return to the DIAG level.

16
Antenna Mismatch Check
An antenna mismatch indicates that reception quality may be impaired.
1. Once DIAG displays, press MENU/OK; VOLT displays.
2. Turn Channel Selector until ANT displays.
3. Press MENU/OK. GO PTT displays.
4. Press and hold PTT. The Antanna Mismatch condition, PASS or
FAIL, displays.
5. Release PTT and press MENU/OK to return to the DIAG level.
EXIT Menu
Exit the menus from the main menu levels (COLOR, CONT, BRIGHT,
WXSCAN, and DIAG). From this level, turn Channel Selector until EXIT
displays. Press MENU/OK. The radio returns to the last operating
mode and channel.
OTHER FEATURES
S/RF/CAL/SWR Meter
You can check your incoming and outgoing signal strength and wattage
as you use your Bearcat 880CHR. The 12-column LCD display (refer to
item number 3 on page 6) displays this data. Press and hold PTT on
the microphone to see the RF output power levels. Release PTT to see
incoming signal strengh.
Calibrate Standing Wave Ratio (SWR)
Check and calibrate the SWR to ensure that you are using power
effectively.
1. Press S/RF/CAL/SWR until CAL appears.
2. Press and hold PTT, then rotate the channel selector until the bar
graph meter is at the CAL point.
3. Press S/RF/CAL/SWR until SWR appears.
4. Note the SWR reading and release PTT. If the reading is >1.5,

17
follow your antenna’s instructions to adjust the antenna length.
Then, repeat this step.
PREVENTIVE MAINTENANCE
Every six months:
1. Check the SWR.
2. Be sure all electrical connections are tight.
3. Inspect antenna coaxial cable for wear or breaks in shielding.
4. Be sure all screws and mounting hardware are tight.
MAINTENANCE
The Bearcat 880CHR 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 specied for your Bearcat 880CHR. Failure to do so may void your
warranty.

18
TROUBLESHOOTING
In the event of system malfunction, perform the following procedures:
Problem Suggestion
Unit does not power up Check power cord connections.
Check fuse.
Check vehicle electrical system.
No reception Check microphone connection.
Set CB/PA to CB.
Check VOLUME and SQUELCH.
Check antenna.
Check antenna connection.
Adjust RF Gain.
Poor Reception Check VOLUME and SQUELCH.
Be sure antenna SWR is normal.
Adjust RF Gain.
No Transmission Set CB/PA switch to CB.
Check microphone connection.
Adjust MIC Gain.
Low Transmission Adjust MIC Gain.
Using MEM/SCAN does not
access channels in memory
Verify that there are channels saved into
memory.
Unit does not work as well as
previously.
Turn the power o then back on. The channels
will reset.
Battery power check returned
FAILLO or FAILHI.
Make sure your power wires have a good
connection.
Check your battery charge; it needs to be fully
charged. Lower voltage will cause a failure.
Check your alternator.
Antenna check returned FAIL.Make sure your antenna ground is good.
Check for damage to the antenna.
Check the SWRs at a CB shop. High SWRs will
damage the radio.
RF power diagnosis check
returned FAIL.
Make sure your antenna ground is good.
Check for damage to your antenna.
Check the antenna connection on the back of
the radio. Be sure it is tight.
If you do not get satisfactory results after performing these checks, refer
to www.uniden.com for troubleshooting help.

19
SERVICING YOUR TRANSCEIVER
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.
When ordering parts, be sure to specify the correct model number and serial
number of the unit.
SPECIFICATIONS
GENERAL
Channel: 40
Frequency Range: 26.965 - 27.405 MHz
Frequency Control: PLL Synthesizer
Antenna Impedance: 50 ohms
Power Input: 13.8VDC
Current Drain
TX: AM Full Modulation: 2.2A (max)
RX: At no signal: 650mA
Operating Temperature: -22°F to 140°F (-30°C to 60°C)
Accessories: DC Power Cord
Microphone
Microphone Hanger
Mounting Bracket
6-pin to 4-pin microphone adapter
Owner’s Manual
Part 95 Subpart D (FCC Rules)
Size (W x D x H): 7.25 in. x 7.5 in. x 2.25 in. (without knobs
and jacks)
(184.149 mm x 190.50 mm x 57.15 mm)
Weight: 2.2 Pounds
TRANSMITTER
Output Power: 4 watts
Emission Type: 6A3
Hum and Noise: Better than 40 dB
Frequency Tolerance: ±0.002%
Modulation Percentage (Peak): 100%

20
Spurious Rejection: -70 dB
Output Impedance: 50 ohm, unbalanced
RECEIVER
Sensitivity at 10 dB S+N/N: 0.5 µV
Sensitivity at 500 mW Audio Output: 0.5 µV
Squelch Threshold: 0.5 µV
Antenna Impedance: 50 ohms
Squelch Tight: 1000 µV
Signal Meter S-9: 100 µV
Audio Output Power (max.): 5 watts
Audio Output (10% Dist.): 4 watts
Adjacent Channel Rejection: 55dB
Image Rejection: 65dB
Internal Speaker Impedance: 16 ohms
External Speaker Impedance: 8 ohms
PUBLIC ADDRESS
Output Power at 10% Distortion: 4 watts
Specications shown are typical and subject to change without notice.
FCC PART 15/IC COMPLIANCE
FCC PART 15 COMPLIANCE
This device complies with Part 15 of the FCC rules. Operation is subject
to the following two conditions: (1) This device may not cause harmful
interference, and (2) this device must accept any interference received,
including interference that may cause undesired operation.
Changes or modifications not expressly approved by the party
responsible for compliance could void your authority to operate the
equipment.
Avis de conformité à la FCC : Ce dispositif a été testé et s’avère
conforme à l’article 15 des règlements de la Commission fédérale des
communications (FCC). Ce dispositif est soumis aux conditions suivantes:
1) Ce dispositif ne doit pas causer d’interférences nuisibles et; 2) Il doit