Cobra Electronics 29NW ST User Manual
How to Use Your
Cobra 29 NW ST
Contents
Features..................................................................................................1
Controls & Indicators.......................................................................A1
Installation
Location .............................................................................................2
Mounting and Connection .........................................................2
Antennas
CB Antenna.......................................................................................6
Marine Installation .........................................................................6
Ignition Noise Interference ..........................................................7
Operating Your 29 NW ST
Turning On Your CB........................................................................8
Setting Channel Selector .............................................................9
Calibrate For SWR (Standing Wave Ratio)..............................10
To Receive..........................................................................................12
Selecting a Channel.......................................................................13
S-Meter ...............................................................................................13
SoundTracker
™
System ................................................................14
Activating SoundTracker
™
..........................................................15
NB-ANL/ANL/Off (Noise Blanker/Automatic.........................16
Noise Limiter Switch)
Tone Hi/Nor.......................................................................................17
RF Gain Control................................................................................17
Dimmer Switch................................................................................18
Setting Squelch ...............................................................................18
To Transmit........................................................................................20
Setting Dynamike...........................................................................20
Transmit..............................................................................................21
RF Meter.............................................................................................22
External Speaker .............................................................................23
PA (Public Address) ........................................................................24
Home And Office Set-Up .............................................................26
Temporary Mobile Set-Up...........................................................27
How Your CB Can Serve You..........................................................28
A Few Rules You Should Know ..................................................28
Channel 9 Emergency Messages..............................................28
CB 10 Codes......................................................................................30
Frequency Ranges.............................................................................32
29 NW ST Specifications.................................................................33
Warranty Information .....................................................................34
Optional Accessories.................................................................35-36
Features of This Product
• 40 CB Radio Channels
•SoundTracker™ System
•Heavy-Duty Dynamic
Microphone
•Full 4 Watts AM RF Power Output
• SWR Calibration Meter
• Instant Channel 19 and 9
•Front Panel 4-Pin Microphone
Connector
•Delta -Tune
•Switchable Automatic Noise
Limiter & Noise Blanker
•Adjustable Dynamike Boost
•Tactile Controls
• Illuminated Front Panel
•Dim Control
• RF Gain
•9 ft.Mic Cord
1
CAUTION: TO REDUCE THE RISK OF ELECTRIC
SHOCK DO NOT REMOVE COVER (OR BACK)
NO USER SERVICEABLE PARTS INSIDE
REFER SERVICING TO QUALIFIED SERVICE
PERSONNEL
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
!
!
Installation
Installation
Location
32
Mounting and
Connection
Mounting and Connection
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.
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.
Note
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.
continued
Drill the holes and secure the bracket.
2
1
Connect the antenna cable plug to the receptacle marked “ANT” on the back of the unit.
3
ANT
PA.SP. EXT.SP.
+POWER –
DATE OF
MFG :JUNE 98
FCC ID:BBO3K229LTD
COBRA
MADE IN CHINA
SERIAL NO.:806135776
PRECISION ENGINEERED PRODUCT OF
COBRA ELECTRONICS CORP. CHICAGO, ILL.60707
Installation
Installation
54
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
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.
In a negative grounded vehicle, connect the
red lead of the DC power cord to an accessory
12 volt fuse.
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
5
Plug power cable into back of unit marked
“Power”.Be sure to observe polarity markings.
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.
6
7
Attach the 4-pin microphone cable to receptacle on front of unit and Install unit in bracket
securely.
8
ANT
PA.SP. EXT.SP.
+POWER–
FCC ID:BBO3K229LTD
COBRA
MADE IN CHINA
CAGO, ILL.60707
SIG 1 3 5 7 9 +30dB
23 CAL
RF
SWR
RF
DYNAMIKE
RFGA
S/RF
SWR
CAL
NB/
ANL
ANL
OFF
C
P
MIN MAX MINOFF
VOL SQL
29 NW ST
ANT
PA.SP. EXT.SP.
+POWER–
DATE OF
MFG :JUNE 98
FCC ID:BBO3K229LTD
COBRA
MADE IN CHINA
SERIAL NO.:806135776
PRECISION ENGINEERED PRODUCT OF
COBRA ELECTRONICS CORP. CHICAGO, ILL.60707
Ignition Noise Interference
Antennas
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 NW ST 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.
CB Antenna
Since the maximum allowable power output of
the transmitter is limited by the IC/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. Consult your Cobra dealer
for further details.
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.
CB Antenna
7
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 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.
6
1
A standard antenna connector is provided
on the transceiver for easy connection.
The CB/PA button should be in the
CB position.
Operation
9
Operation
Turning On Setting Channel
Selector
8
Turning On
Make sure the power cord,antenna and microphone are connected to their proper connectors
before starting.
Setting Channel Selector
2
1
Rotate the On/Off Volume knob clockwise to
a normal listening level.
Select one of forty channels and adjust
volume.The selected channel is indicated by
the LED readout directly above the channel
selector knob
1
RFGAIN
SWR CAL
NB/
ANL
ANL
OFF
CB
PA
CH19
CH9
NOR
DIMMER
HI
NOR
MIN MAX
RX/TX
29 NW ST
TONE
9 +30dB
MIN M
DYNAMIKE
RFGAIN
S/RF
SWR
CAL
NB/
ANL
ANL
OFF
CB
PA
CH
CH
NO
VOL SQL
DIMMER
HI
NOR
29 NW ST
TONE
SIG 1 3 5 7 9 +30dB
SWR
RF
23 CAL
VOL SQL
S/RF
SWR
CAL
DYNAMIKE
MIN MAX MIN MAXOFF
NB/
ANL
ANL
OFF
29 NW ST
RFGAIN
CB
PA
RFGAIN
SWR CAL
NB/
ANL
ANL
OFF
CB
PA
CH19
CH9
NOR
AX MIN MAX
DIMMER
HI
NOR
MIN MAX
RX/TX
29 NW ST
TONE
While holding mic
button adjust the
SWR CAL knob so the
meter needle swings
to the CAL ▼ mark on
the meter (located on the right).
Operation
Operation
Calibrate For
SWR (Standing
Wave Ratio)
1110
continued
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).
Note
The reading will be slightly higher on Channels 1 and 40 compared to Channel 20.
Push and hold mic button.
Switch to the CAL position.
2
1
3
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.
PUSH &
HOLD
Select channel 20.
4
RFGAIN
SWR CAL
NB/
ANL
ANL
OFF
CB
PA
CH19
CH9
NOR
DIMMER
HI
NOR
MIN MAX
RX/TX
29 NW ST
TONE
SWR
23 CAL
RF
SIG 1 3 5 7 9 +30dB
VOL SQL
S/RF
SWR
CAL
DYNAMIKE
MIN MAX MIN MAXOFF
29 NW ST
NB/
ANL
ANL
OFF
CB
PA
RFGAIN
23 CALSWR
RF
SIG 1 3 5 7 9 +30dB
Rotate the On/Off Volume knob clockwise
the green RT/TX LED will be illuminated.
Repeat the same steps two through five on
Channel 1 and 40. This will check SWR for all
channels.
The S/RF-SWR-CAL switch must be in the
S/RF position to read the meter.
6
While still holding down the mic button, set
the S/RF SWR CAL switch to the SWR position,
to read the SWR reading.
5
Operation
13
Operation
12
1
Note
When switched to SWR position the meter needle 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 relcalibration
steps.
S-Meter
S-Meter
Swings proportionately to strength of incoming
signal when receiving.
Switch to NOR to select desired channel.
1
Selecting A
Channel
Selecting A Channel
Note
Switch to 9 (Emergency) or 19
(Information) for instant access
to these channels.
To Receive
1
To Receive
9 +30dB
MIN MA
DYNAMIKE
RFGAIN
S/RF
SWR
CAL
NB/
ANL
ANL
OFF
CB
PA
CH19
CH9
NOR
VOL SQL
DIMMER
HI
NOR
29 NW ST
TONE
DYNAMIKE
S/RF
SWR
CAL
NB/
ANL
ANL
OFF
VOL SQL
SIG 1 3 5 7 9 +30dB
23 CALSWR
RF
29 N
23 CAL
SWR
RF
SIG 1 3 5 7 9 +30dB
VOL SQL
S/RF
SWR
CAL
DYNAMIKE
MIN MAX MIN MAXOFF
NB/
ANL
ANL
OFF
29 NW ST
CB
RFGAIN
PA
TONE
CH19
HI
NOR
IN
DIMMER
CH9
NOR
RX/TX
SWR CAL
MIN MAX
MAX
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