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PRO 81 Oe
Professional CB Base Station
OWNER'S MANUAL
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Welcome!
To the world of sophisticated, microprocessor controlled CB radio communi
cations. Your Uniden PRO 81Oe represents the most advanced base station ever
designed for use in the Citizens Band Radio Service, It will operate on any of the 40
AM, 40 USB, and 40 LSB frequencies authorized by the Department of Com munications. Your PRO 8 ? Oe features a superheterodyne circuit with PHASE LOCKED
LOOP techniques to assure precise frequency control. This radio has been type ac
cepted and certified by the D.O.C.
WARNING
UNIDEN DOESNOTREPRESENTTHEUNITTO HAVE BEEN WATERPROOFED. TO RE
DUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS APPLIANCE TO
RAIN OR MOISTURE.
A A
CAUTION: TO REDUCE
THE RISK OF ELECTRIC
SHOCK, DO NOT REMOVE
COVER (OR BACK). NO US
ER-SERVICEABLE PARTS IN
SIDE. REFER SERVICING TO
QUALIFIED SERVICE PER
SONNEL,
The lightning flash with
arrowhead symbol, within
an equilateral triangle, is in
tended to alert the user to the
presence of uninsulated
"dangerous voltage" within
the product's enclosure that
may be of sufficient magni
tude to constitute a risk of
electric shock to persons.
The exclamation point within
an equilateral triangle is in
tended to alert the userto the
presence of important op
erating and maintenance
(servicing) instructions in the
literature accompanying the
appliance.
Installation
Select a location that is convenient for operation and allows adequate air circula
tion around the unit. Do not place anything directly on top of the radio cabinet
which would block the cooling vents. Avoid areas of high heat. Do not place the
unit on top of radiator vents or in direct sunlight. Do not place the unit in high
moisture environments such as bathrooms.
Antenna
Since the maximum allowable power output of the transceiver is limited by the
D.O.C,, the antenna is a very important factor affecting transmission distance, it is
for this reason that we strongly recommend that you install only a quality antenna
in your new CB radio system. You have purchased a superior quality transceiver
Don't diminish its performance by installing an inferior antenna.
Only a properly matched antenna system will a I low maximum power transfer from
the 50-ohm transmission iine to the radiating element. U/e recommend that you
use an SWI? meter when installingyour antenna. Set your PRO 81 Oe to channel 20
and make adjustments to the antenna until the meter shows $WR = I. Your
Uniden dealer is qualified to assist you in the selection of the proper antenna to
meet your application requirements.
The PRO 81 Oe may be used with any type of 50 ohm base station antenna. A
ground plane vertical antenna will provide the most uniform horizontal coverage.
This type of antenna is best suited for communication with a mobile unit. For
point to point operation where both stations are fixed, a directional beam will
usually increase communication range since this type of antenna concentrates
transmitted energy in one direction. The beam antenna also allows the receiver to
"listen" in only one direction thus reducing interfering signals.
Antenna height Is an important factor when maximum range is desired. Keep the
antenna clear of surrounding structures and foliage, D.O.C. regulations may limit
antenna height above an existing structure.
Connect the male connector (PL-259) of the coaxial cable from the antenna to the
female connector on the back of the unit.
Controls and Functions
1. Microphone - The operational mode of the CB is controlled by the push-to
tal k 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 transmitter
When transmitting, hold the mic a bout 2 inches from your mouth and speak clear
ly in a norma) voice. The mic included with the PRO SlOe is a detachable, low
impedance, dynamic type,
2. Mic Gain — Adjust the microphone sensitivity for crisp, clear audio transmis
sion.
3. CH 9 - A single key gives instant access to the emergency channel 9,
4. illuminiited S/RF Meter - An accurate analog meter displays the signal
strength of both the transmitter and receiver.
5. TX & RX LEDs ~ The TX LED lights when transmitting and the RX LED lights
when receiving.
6. Channel Display — A large LED display shows the channel currently in use.
7. Channel Selector — An oversize channel knob makes it easy to select any of
the forty channels. This switch selects the desired channel for transmission and
reception. All channels, except channel 9, may be used for communications be
tween stations operating under different license. Channel 9 has been reserved by
the D.O.C, for emergency communications.
8. Clarifier — Used for fine tuning when operating in USB or LSB modes.
9. Hi Cut Switch - The Hi Cut switch is used to remove high frequency hiss and
other forms of noise from the received signal. Press the Hi Cut switch to activate
this feature.
10. RF Gain — This control is used to adjust signal reception in areas where
strong signals are present. Turn the control fully clockwise for maximum recep
tion.
11. Squelch — The Squelch control is used to eliminate background noise during
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 trans
mission 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 sig
nal will be heard. You can select any level to "Break Squelch"
12. Volume with Power On/Off Control - Turn the unit on and adjust the
volume,
13. IMB/ANL Key - Select the Noise Blanker and Automatic Noise Limiter to
help reduce electrical noise or other interference.
14. AM/USB/LSB Switch — Selects either Amplitude Modulation, Upper
Sideband, or Lower Sideband for transmission and reception.
15. PA Key - Select the Public Address mode if an external PA speaker is con
nected,
16. Power 7 Watt Audio Output — Enhanced audio circuitry with Tone ad
justment and a booming 7 watt audio output provide CB reception like you've
never heard it before.
17. Rugged Metal Cabinet - A professional quality metal housing insures
years of dependable use.
Pro 810e Front View
18. AC Power Cord — Connect to any 240 V house hold AC outlet.
19. PA Speaker - An external 8 ohm 7-watt speaker must be connected to the
"PA SP" jack located on the back of the unit The speaker must be directed away
from the mic to prevent feedback.
20. External Speaker — The "EXT. SP."jack is used for remote receiver monitor
ing. The external speakershould have an 8 ohm impedance and be rated at least 7
watts. When an external speaker is connected, the internal speaker is disabled.
21. Antenna Connector — This female connector permits connection of the
transmission line cable male connector (PL-259) to the transceiver.
Ooeration
Connecting the Power
Plug the power cord intoany 240 VAC outlet. Make sure the cord is not kinked or
tightly wound.
To Receive
1. Be sure that the power source, antenn? and microphone are properly connect
ed.
2. Turn the unit on by rotating the Volume control clockwise.
3. Set the channel selector switch to the desired channel.
4 Set the Volume control to a comfortable listening level.
5. Listen to the background noise from the speaker. Turn the Squelch control
clockwise until the noise disappears (no signal should be present). Leave the con
trol at this setting, The squelch is now properly set. The receiver will remain quiet
until a signal is actually received. Do not advance the control too far, or some
weaker signals will not be heard.
6. When a transmission is heard with annoying high frequency distortion, acti
vate the Hi Cut feature to eliminate this. If the transmission has interference try
activating the AIML and/or the NB key.
To Transmit
J. Select the desired channel and operating mode for transmission,
2. If the channel is clear, depress the push-to-talk switch on the side of the micro
phone and speak in a normal voice,
CAUTION: The transceiver Voltage Standing Wave Ratio (V.S.W.R.) measure
ment must be performed prior to the use of the transmitter. A "V.S.W.R." ratio in
excess of 2:1 may damage the transmitter. Please check your SWR reading fre
quently with an SWR meter.
Preventative Maintenance
At six to twelve month intervals, the following system checks should be made:
!. Check the Standing Wave Ratio (V.S.W.R.)
2, Inspect ail electrical connections
3, Inspect antenna coaxial cable for wear
Troubleshootin
If your PRO 8 lOe is not performing up to your expectations, please try these simple
steps;
Trouble
Unit will not turn on.
No power.
Poor reception
Weak transmission 1. Check antenna system and cable, connec
If you determine that service is necessary con tact your loca I dealer or pack the unit
in its original carton. Send it along with a brief, concise description of the prob
lem, your name, address, phone number, anda copy of the original purchase
receipt to the address listed in the warranty.
Check
1. Check power cord and all
connections.
2. Check wall switch if any.
3. Check house electrical system.
1. Check and adjust Squelch.
2. Check antenna system and cable, connec
tors.
3. Check operation mode of the radio.
tors,
2. Check antenna grounding,
3. Check for corrosion on connectors.
SERVICING YOUR CB
Technical information, diagrams and charts will be provided upon request. We
highly recommend that you consulta qualified radiotelephone technician for ser
vice and alignment of this radio. When ordering parts, it is important to specif the
correct model number and serial number of this radio.
Please refer to the WARNING information on the first page of this manual.
Soecifications
Channels: 40 AM, 40 USB, 40 LSB
Frequency Range; 26.965 to 27.405 MHz
Frequency Control; Phase Locked Loop (PLL) synthesizer
Frequency Tolerance: ±0.005%
Operating Temp.: -30°C to ±50X
Microphone: Plug in type; dynamic
Input Voltage; 240V AC 50 Hz
Current Drain;
Size; 14 3/8" W X 8 7/8" D X 3 3/4"H
Weight: 3 ib. 2 oz.
Antenna Connector: UHF, SO-239
Analog Meter:
TRANSMITTER
Power Output; Maximum Legal Output Power
Freq, Response: 450 - 2500 Hz
Output Impedance; 50 ohms, unbalanced
RECEIVER
Sensitivity: 0.5/jV for JOdB; (S ± N)/N typical
Selectivity: 6dB @ 4.2KHZ, 60dB @ 7KHz typical
image Rejection: 80 dB typical
i.F. Frequency: Single Conversion Superheterodyne
RF Gain Controf: Adjustable for optimum reception
Automatic Gain: (AGC):less than lOdB change in audio output
Noise Blanker; RF type
Squelch; Adjustable; threshold less than 1/jV
Audio Output Power: 7 watts max, into 8 ohms
Freq. Response; 250 to 2500 Hz
Distortion: less than 10% at 3 watts, @ lOOOHz
Internal Speaker:
External Speaker: (not supplied) 8 ohms
PA System; 7 watts in external 8 ohm speaker
TX; full mod., 400 mA
RX; with max audio output, 200 mA
indicates relative RF output and received sig
nal strength
J0.695 MHz
for inputs from 10 to 50.000 microvolts
16 ohms, 7 watts oval
Channel Freauencies
I
2 26.975 22 27.225
3 26,985 23 27,255
4
5 27.015 25 27.245
6
7 27.035 27 27.275
8 27.055 28 27.285
9
26.965
27.005
27.025 26 27.265
27.065
21
24
29
27.215
27.235
27.295
to 27.075 30 27.305
11 27.085 31 27.315
12 27.105 32 27.325
Í3 27.1 15 33 27.335
14 27.125 34 27.345
15 27.135 35 27.355
JÓ 27,155 36 27,365
17 27,165 37 27,375
18 27.175 38 27.385
19 27.185 39 27.395
20 27,205 40 27.405
NOTE: This radio has been designed to operate in the 11 meter Citizens Radio
Service. It uses a frequency synthesizing circuit with Phase Locked Loop (PLL) tech
niques to provide crystal controlled transmitand receive operation on all 40 chan
nels, The PLL circuitry assures ultraprecise frequency control. It is designed to
meet the Department of Communications requirements applicable to equipment
operating in the Citizens Band Radio Service, and is not to be used for any other
purpose.
Warran
WARRANTOR: Uniden Australia Pty, Ltd. ("UNIDEN"),
ELEMENTS OF WARRANTY! Uniden warrants, for the duration of this warran
ty, UNIDEN CB Product (hereinafter referred to as the Product} to be free from de
fects in materials and craftsmanship with only the limitations or exclusions set out
below.
WARRANTY DURATION! This warranty shall terminate and be of no further ef
fect one (I) year after the date of the original purchase of the Product orat the time
the Product is (A) damaged or not maintained as reasonable and necessary, (B)
modified, (C) improperly installed, (D) repaired by someone other than warrantor
fora defector malfunction covered by this warranty, (E) used in a manner or pur
pose for which the Product was not intended, or(F] sold bythe original purchaser.
STATEMENT OF REMEDY: In the event that the Product does not conform to
this warrantyatanytime while this warranty is in effect, warrantorwill repair the
defect and return it to you without charge for parts, service, or any other cost in
curred by warrantor or its representatives in connection with the performance of
this warranty. THIS WARRANTY DOES NOT COVER OR PROVIDE FOR THE
REIMBURSEMENT OF PAYMENT OF INCIDENTAL OR CONSEQUENTIAL DA
MAGES. Some states do notallow this exclusion or limitation of incidentai or con
sequential damages, so the above limitation or exclusion may not apply to you.
PROCEDURE FOR OBTAINING PERFORMANCE OF WARRANTY: In the
event that the Product does not conform to this warranty, the Product should be
shipped or delivered, freight prepaid, to warrantor at Uniden Australia Pty. Ltd.
345 Princes Highway, Rockdale, N.S. W. 2216 with evidence of original purchase.
uniden’
CUSTOMER SERVICE
345 Princes Hwy, Rockdale, NSW. 22)6
Phone (02) 599 3)00 Fax (02) 599 3278
uniden*
AUSTRALIA PTY. LTD.
345 Princes Highway, Rockdale, N.S.W. 2216
Phone; (02) 599 3355
Fax; f02) 599 4018
UTUA01552CA
Printed in the Philippines
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