Cobra GR 29 LTD ST User manual

GR 29 LTD ST
Cobra Electronics Corporation
6500 West Cortland Street
Chicago, IL 60707 USA
www.cobraelec.com
“Ingenious Products for Easier Communication.”
OperatingInstructionsforyour CobraGR 29 LTD ST CB Radio
Bedienungsanleitung für lhr Modell Cobra GR 29LTD ST CB-
Funkgerät
Instructivo de usode la radio debanda ciudadana (CB) Cobra
GR 29LTD ST
Instructions d’utilisationdu poste de radioCB GR 29 LTD ST
deCobra
Istruzioni per l’uso del modello Cobra GR 29LTD ST Radio CB
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How to Use Your
Cobra GR 29 LTD ST
Contents
Section A(English)
Features..................................................................................................1
Included Accessories ......................................................................A1
Controls & Indicators.......................................................................A2
Our Thanks to You.............................................................................A3
SoundTracker™
Installation
Location.............................................................................................2
Mounting and Connection.........................................................2
Antennas
CB Antenna.......................................................................................6
Marine Installation.........................................................................6
Ignition Noise Interference..........................................................7
OperatingYour GR 29 LTD ST
Turning On Your CB........................................................................8
Setting Channel Selector.............................................................9
Calibrating 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)
Bright/Dim Switch..........................................................................17
RF Gain Control................................................................................17
Setting Delta Control....................................................................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
Local Laws or Regulations...........................................................29
CB 10-Codes.....................................................................................30
Frequency Ranges.............................................................................32
GR 29 LTD ST Specifications.........................................................33
Accessories...........................................................................................34
Deutsch ................................................................................Abschnitt B
Español.....................................................................................Sección C
Français....................................................................................Section D
Italiano .....................................................................................Sezione E
Featuresof ThisProduct
• 2.75-metremicrophonecord
• 40EuropeanCEPT
40GermanFM
12AMChannels
• SoundTracker™System
• Heavy-DutyDynamic
MicrophoneWithChannel
Changer
• Full4WattsFMRFPowerOutput
• 1WattAMPowerOutput
• SWRCalibrationMeter
• InstantChannel19and9
• FrontPanel6-PinMicrophone
Connector
• SwitchableAutomaticNoise
Limiter&NoiseBlanker
• TactileControls
• ToneControl
• IlluminatedFrontPanel
• DimControl
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 !!
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InstallationInstallation
Location
32
Mounting and
Connection
Mounting and Connection
Hold the radio with the mounting bracket in
the exact desired location.If there is no inter-
ference,remove the bracket and use it as a
template to mark the location for the mount-
ing 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 withthedriver or passenger.
The transceiver is usually mounted to the under-
side of the dash with the microphone bracket
beside it.
Note
Thetransceiverisheldinthe
universalmountingbracketby
twothumbscrewswhichallow
foradjustmentataconvenient
angle.
Thebracketincludestwoself-
tappingscrewsandstarwash-
ers.Themountingmustbe
mechanicallystrongandconve-
nientlylocated.
continued
Drill the holes and secure the bracket.
2
1
Connect the antenna cable plug to the recep-
tacle marked“ANT” on the back of the unit.
3
cb transceiver
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InstallationInstallation
54
Note
Beforeinstallingthe CBradio,
visuallycheckthe vehicle’s
batteryconnectionto deter-
minewhich terminal, positive
ornegative,isearthedto the
engineblock (orchassis). A
negativelyearthedvehicle
hasitsnegative leadearthed
tothechassis.
Note
Connectingtoafusecircuitcon-
trolledbytheignitionswitch
preventstheunitfrom beingleft
onaccidentally,andalsoper-
mitsoperatingtheunitwithout
runningtheengine.
Note
Inpositiveearthvehiclesthered
wiregoestothechassisandthe
blackwireisconnectedtothe
ignitionswitch.
In a negative earthed 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 con-
venient 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 (nearer the driver)
using two screws sup-
plied.Bracket should be
placed under the dash
so that microphone is
readily accessible.
6
7
Attach the 6-pin microphone cable to recepta-
cle on front of unit and Install unit in bracket
securely.
8
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Ignition Noise InterferenceAntennas
Use of a mobile receiver at low signal levels is
normally limited by the presence of electrical
noise.The primary source of noise in cars is from
the alternator and the 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 signifi-
cantly discharge the vehicle’s battery.
Even though the Cobra GR 29 LTD ST has an auto-
matic 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
The antenna is critical in affecting transmission
distance.Only a properly matched antenna sys-
tem will allow maximum power output. Cobra
loaded type antenna models are highly recom-
mended for most installations.Consult your
Cobra dealer for further details.
Marine Installation
The transceiver will not operate at maximum effi-
ciency in a boat without an earth plate,(unless it
has a steel hull). Before attempting installation ,
consult your dealer for information regarding an
adequate earthing system and prevention of
electrolysis between fittings in the hull and water.
CB Antenna
7
Note
Foroptimumperformancein
passengercarstheidealanten-
nalocationisonthecentreof
theroof.Secondchoiceis onthe
centreofthe boot.
Note
Antennamustbeearthed tothe
chassisofthevehicle.
6
1A standard antenna connector is provided
on the transceiver for easy connection.
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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 micro-
phone are connected to their proper connectors
before starting.
Setting Channel Selector
2
1
Rotate theOn/Off Volume knob clockwiseto
a normal listening level.
The CH19/CH9/NOR switch should be in
the NOR position
Select one of forty channels and adjust
volume.The selected channel is indicated by
the LED readout directly above the channel
selector knob.
Select band Selector: EU-European 40
channels FM,DE-German 40 channels FM,
AM-German 12 channels AM.
1
2
Select channel on microphone by pressing chan-
nel up or down. Lock channel selected with lock
button.
3
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While holding micro-
phone button adjust
the SWR CAL knob so
that the meter needle
swings to the CAL ▼
mark on the meter (shown on the right).
OperationOperation
Calibrating For
SWR (Standing
Wave Ratio)
1110
continued
Note
Calibrationmustbemadeinan
openarea(neverinagarage).
Vehicledoorsmustbeclosed.No
oneshouldbestandingnearthe
antenna.(See your antenna
directionsformorecomplete
information).
Note
Thereadingwillbeslightlyhigh-
eronChannels1and40com-
paredtoChannel20.
Pushandhold microphone 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 opti-
mum performance.
Select channel 20.
4
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Rotate the On/Off Volume knob clockwise.
The green RX/TX LED will be illuminated.
Repeat the same steps 2 to 5 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 microphone but-
ton,set the S/RF SWR CAL switch to the SWR
position,to read the SWR reading.
5
Operation
13
Operation
12
1
Note
WiththeS/RF-SWR-CALswitch
intheSWRpositionthemeter
needleshouldideallybeasfar
totheleftaspossible.
Anythingover3is notaccept-
able. Aslight antennaheight
adjustment(higherorlower)
mayberequired.Repeatrel-
calibrationsteps.
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
Switchto9 or19forinstant
accesstothesechannels.
To Receive
1
To Receive
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OperationOperation
1514
Activating
SoundTracker
™
Pushandrelease the ST button.Red LED
is illuminated when SoundTracker™ is
turned on.
1
The SoundTrackerTM System
While previous systems only “blanket out”or limit
noise in higher sound frequencies,the revolution-
ary new SoundTrackerTM System actually reduces
noise while leaving the signal intact in the recep-
tion mode. In the transmission mode, it actually
strengthens the signal,providing you with a
significant reduction in noise on reception
and transmission.
Sound clarity is measured by the ratio
of the signal level to the noise level.
The higher the signal-to-noise ratio,
the better the sound.
How SoundTrackerTM Works
OnReception-“Cutsnoisecomingin”
With a normal CB,distant signals fall below
the squelch level and are unintelligible.With a
SoundTrackerTM CB,the noise level is cut by up to
90%,which increases the signal-to-noise ratio
and dramatically improves signal clarity.This also
allows you to reduce the squelch level significant-
ly, which greatly expands your listening range.
OnTransmission-“Strengthenssignalsgoingout”
A SoundTrackerTM CB strengthens the transmit
signal by more effectively using the available RF
power output of the CB.The result is improved
transmission signal clarity and an expanded
transmission range.
Note
SoundTracker™ givesyou
clearer,cleanerreceptionto
improveCBcommunications
whileontheair.
Activating SoundTracker™
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Whenswitched to ANL the Automatic Noise
Limiter is activated.This helps reduce noise
created by the vehicle’s electronics.
Whenswitched to NB/ANL position the RF
Noise Blanker is also activated,providing
increased noise filtration.
Whenswitched to OFF position all noise
filtration will be turned off.
OperationOperation
1716
NB-ANL/ANL/
OFF (Noise
Blanker/
Automatic
Noise Limiter)
Switch
Note
TheRFnoiseblankerisvery
effectiveinreducingrepetitive
noisessuchasignitioninterfer-
ence.
NB-ANL/ANL/OFF (Noise
Blanker/Automatic Noise Limiter) Switch
1
RF Gain Control
Dimmer Control
RF Gain Control
The RF Gain is used to optimize reception in
strong or weak signal areas.
Dimmer Control
Note
TheRFGainisusedtooptimize
receptioninweaksignal areas.
Rotate the RF Gain knob anticlockwise to
reduce gain in strong signal areas.In weak
signal areas turn clockwise to increase gain.
1
1Rotatethe Dimmer knobclockwiseformaxi-
mumbrightness;anticlockwiseforminimum.
Note
TheDimmercontrolsthe
brightnessofthefrontpanel,
signalstrengthmeterand
channeldisplay.
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