The transceiver is held in the
universal mounting bracket by
two thumbscrews which allow
for adjustment at a convenient
angle.
The bracket includes two selftapping screws and star washers. The mounting must be
mechanically strong, conveniently located.
Location
Plan location of transceiver and microphone
bracket before starting the installation.
Select a location that is convenient for operation,
yet does not interfere with the driver or passenger.
The transceiver is usually mounted to the underside of the dash with the microphone bracket
beside it.
Mounting and Connection
1
Hold the radio with the mounting bracket in
the exact desired location. If there is no interference, remove the bracket and use it as a
template to mark the location for the mounting screws.
2
Drill the holes and secure the bracket.
2
3
Connect the antenna cable plug to the recep-
tacle marked “ANT” on the back of the unit.
Installation
continued
3
Installation
Note
Before installing the CB radio,
visually check the vehicle’s
battery connection to determine which terminal, positive
or negative, is grounded (positive is the larger of the two)
to the engine block (or chassis). A negatively grounded
vehicle has its negative lead
grounded to the chassis.
Note
Connecting to an accessory fuse
prevents the unit from being left
on accidentally, and also permits operating the unit without
running the engine.
Note
In positive ground vehicles the
red wire goes to the chassis and
the black wire is connected to
the ignition switch.
Note
When connected to an accessory fuse, unit will self test
the emergency weather alert
automatically when ignition
is turned on. Turns itself on & off.
4
In a negative grounded vehicle, connect the
red lead of the DC power cord to an accessory
12 volt fuse.
5
Connect the black lead to the negative side
of the vehicle. This is usually the chassis. Any
convenient location with a good electrical
contact (remove paint) may be used.
4
6
Plug power cable into back of unit marked
“Power”. Be sure to observe polarity markings.
7
Mount the microphone
bracket on either side
of the unit (driver’s left)
using two screws supplied. Bracket should be
placed under the dash
so microphone is readily
accessible.
Installation
8
Attach the 4-pin microphone cable to
receptacle on front of unit and install unit
in bracket securely.
Note
If microphone is not
connected, audio will not
be heard at speaker.
5
Antennas
CB Antenna
Note
For optimum performance in
passenger cars the ideal antenna location is on the center of
the roof. Second choice is on the
center of the trunk.
Note
Because many newer trucks
feature fiberglass door skins,
the outside mirror must be
grounded to the chassis via a
ground strap, if the antenna is
mounted on the mirror bracket.
Note
3-way Combination Antennas
are also available which allow
operation of all three bands
(AM-FM & CB), using a single
antenna. However, this type
of antenna usually results in
less than normal transmit and
receive range when compared
to a standard-type “Single
Band” CB antenna. Call 773889-3087 for further information.
CB Antenna
Since the maximum allowable power output of
the transmitter is limited by the FCC, the antenna
is critical in affecting transmission distance. Only a
properly matched antenna system will allow maximum power output. Cobra loaded type antenna
models are highly recommended for most installations. For models with Weather Feature (WX),
a Dual Band (Center Load/Base Load) antenna
is recommended. Consult your Cobra dealer for
further details, or call 773.889.3087 and speak to a
Cobra representative.
1
A standard antenna connector is provided
on the transceiver for easy connection.
Marine Installation
The transceiver will not operate at maximum
efficiency in a boat without a ground plate,
(unless it has a steel hull). Before attempting
installation , consult your dealer for information
regarding an adequate grounding system and
prevention of electrolysis between fittings in the
hull and water.
6
Ignition Noise Interference
Use of a mobile receiver at low signal levels is
normally limited by the presence of electrical
noise. The primary source of noise in automobiles is from the alternator and ignition system.
Typically, when signal level is adequate, the background noise does not present a serious problem.
Also, when extremely low level signals are being
received, the transceiver may be operated with
the vehicle’s engine turned off. The unit requires
very little current and therefore will not significantly discharge the vehicle’s battery.
Even though the Cobra 29 LX LE has an automatic noise limiter, in some installations ignition
interference may be high enough to make good
communications impossible. Many possibilities
exist and variations between vehicles require
different solutions. Consult your Cobra dealer or
a 2-way radio technician for help in locating the
source of a severe noise.
7
Operation
Turning On
Turning On
Make sure the power cord, antenna and microphone are connected to their proper connectors
before starting.
1
Rotate the On/Off Volume knob clockwise to
turn unit on and adjust to a normal listening
level.
CH 9/
SCAN
CB/ WX/
PA
T BACK
19
DIM
ESC
SWR
CAL
MEM SCAN
H
MEM WX !
E
N
T
E
R
F GAINDELTA TUNE
2
Press the CB/PA/WX button to change modes.
8
Operation
A
Setting Channel Selector
NB/ANL
NB/ANL
SWR
ANL
S/RF
S/RF
RF
SWR
CAL
SWR/CAL
OFFMIN
3
Select one of forty channels and adjust
SIG
VOL SQDYNAMIKERF G
volume. The selected channel (1 through
40) will be indicated by the readout directly
above the channel selector knob
3
2
1.5
1
CAL
TX
RX
5
3
7
9
+30dB
S
H
U
P
E
N
U
T
N
E
M
E
R
MEM WX !
MIN
Setting Channel
Selector
Note
Press CB/WX/PA to select CB,
weather channels or PA (public
address) modes.
9
Operation
NB/ANL
M
M
Calibrate For
SWR (Standing
Wave Ratio)
Calibrate for SWR (Standing Wave Ratio)
SWR calibration is done to properly adjust the
length of the antenna and to monitor the quality
of the coaxial cable and all RF connections.
This calibration is critical in order to achieve optimum performance.
3
2
1.5
SWR
S/RF
SWR/CAL
OFFMIN
1
Select channel 20.
RF
3
1
SIG
VOLSQDYNAMIKE
CAL
RX
5
7
9
+30dB
S
U
P
U
N
E
M
ME
H
E
N
T
E
R
2
Press SWR/CAL button to select CAL.
10
PUSH &
CH 9/
19
SCAN
HOLD
3
Push and hold mic button.
Operation
Note
Calibration must be made in an
open area (never in a garage).
Vehicle doors must be closed.
No one should be standing near
the antenna. (See your antenna
directions for more complete
information).
N
T
E
R
4
While holding mic
F GAINDELTA TUNE
MINOFFMAX
button adjust the
SWR CAL knob so
MEM SCAN
CB/ WX/
PA
T BACK
DIM
ESC
SWR
CAL
the meter swings
to the CAL mark on
the meter (located
on the right).
continued
Note
The reading will be slightly
higher on Channels 1 and 40
compared to Channel 20.
11
Operation
M
M
W
Calibrate for
SWR continued
Note
When switched to SWR
mode the meter reading
should ideally be as far to the
left as possible. Anything over
3 is not acceptable. A slight
antenna height adjustment
(higher or lower) may be
required. Repeat recalibration
steps.
To Receive
NB/ANL
S/RF
SWR/CAL
5
While still holding down the mic button, press
SWR
RF
SWR
SIG
VOL SQDYNAMIKE
OFFMIN
3
2
1.5
1
CAL
RX
5
3
7
9
+30dB
S
H
U
P
E
N
U
T
N
E
M
E
R
and release the S/RF SWR CAL button to the
SWR setting, to read the SWR reading.
6
Repeat the same steps two through five on
Channel 1 and 40. This will check SWR for all
channels.
To Receive
NB/ANL
NB/ANL
ANL
S/RF
S/RF
SWR
CAL
SWR/CAL
VOL SQDYNAMIKE
SWR
RF
SIG
3
2
1.5
1
CAL
RX
5
3
7
9
+30dB
S
H
U
P
E
N
U
T
N
E
M
E
R
ME
MEM
OFFMIN
1
Rotate the On/Off Volume knob clockwise.
The RX icon will be displayed.
12
MIN
Operation
L
N
Selecting A Channel
RX
5
3
7
1
IG
MIN
9
+30dB
DYNAMIKERF GAINDE
S
H
U
P
U
N
E
M
MEM
E
N
T
E
R
MINMAX
Unit should be in CB mode. Rotate channel
selector clockwide or counter-clockwise to
1
select desired channel.
S-Meter
Swings proportionately to strength of incoming
signal when receiving.
3
2
1.5
SWR
S/RF
RF
3
1
SIG
OLSQDYNAMIKE
CAL
RX
5
7
9
+30dB
S
H
U
P
E
U
N
E
M
Selecting A
Channel
S-Meter
1
The S/RF-SWR-CAL switch must be in the S/RF
setting to read the meter.
13
PUSH &
HOLD
Operation
To Transmit
Caution!
Be sure the antenna is properly
connected to the radio before
transmitting. Prolonged transmitting without an antenna,
or a poorly matched antenna,
could cause damage to the
transmitter.
Be sure to read the F.C.C. Rules
and Regulations included with
this unit before transmitting.
To Transmit
1
Select desired channel.
Transmit
2
Push and hold mic button to transmit.
Transmitter is now activated. When transmitting, hold the microphone two inches from
your mouth and speak in a clear, normal voice.
Release to receive.
14
Operation
NB/ANL
M
Setting Dynamike®
This controls the microphone sensitivity
(outgoing audio level).
3
2
RF
SWR
SIG
1.5
1
CAL
TX
RX
5
3
7
9
+30dB
S
H
U
P
E
N
U
T
N
E
M
E
R
NB/ANL
ANL
S/RF
S/RF
SWR
SWR/CAL
3
Initially, set fully clockwise so that maximum
CAL
VOL SQDYNAMIKE
OFFMIN
voice volume is available. Dynamike may
have to be reduced in some conditions.
Setting
Dynamike
®
15
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