Cobra GR-25LTD ST User manual

GR25 LTD ST
Cobra Electronics Corporation
6500 West Cortland Street
Chicago, IL 60707 USA
www.cobraelec.com
Cobra Electronics Corp.© 1999 “IngeniousProducts for Easier Communication.”
OperatingInstructions foryour Cobra GR 25LTDSTCBRadio
Bedienungsanleitungfür lhr Modell CobraGR 25LTD ST CB-
Funkgerät
Instructivo de uso de laradiode banda ciudadana (CB) Cobra
GR 25 LTD ST
Instructionsd’utilisationduposte de radioCB GR 25 LTD ST
deCobra
Istruzioniper l’usodelmodello Cobra GR 25 LTD STRadioCB
GR25LTDST-English copy 6/21/99 12:00 PM Page 35
Downloaded from www.cbradio.nl

Thank you for purchasing the Cobra GR 25 LTD ST
CB Radio.Properly used,this Cobra product will
give you many years of reliable service.
SoundTrackerTM
“Cuts noise coming in...strengthens signals
going out.”
This patent-pending technology dramatically
improves transmission and reception of CB
signals.
The revolutionary SoundTrackerTM System recon-
figures the transmission signal,allowing it to be
transferred more efficiently through cluttered air-
waves.
At the same time,it significantly reduces the
amount of static on all incoming CB signals.
The end result is a cleaner,clearer reception of
signals and a more powerful transmission,which
dramatically improve CB communications.
CobraontheWorldWideWeb:
FrequentlyAskedQuestions
(FAQ)canbefoundon-lineat:
www.cobraelec.com
Our Thanks to You
A3
GR25LTDST-English copy 6/21/99 12:00 PM Page 37

Thank you for purchasing the Cobra GR 25 LTD ST
CB Radio.Properly used,this Cobra product will
give you many years of reliable service.
SoundTrackerTM
“Cuts noise coming in...strengthens signals
going out.”
This patent-pending technology dramatically
improves transmission and reception of CB
signals.
The revolutionary SoundTrackerTM System recon-
figures the transmission signal,allowing it to be
transferred more efficiently through cluttered air-
waves.
At the same time,it significantly reduces the
amount of static on all incoming CB signals.
The end result is a cleaner,clearer reception of
signals and a more powerful transmission,which
dramatically improve CB communications.
Controls and Indicators
CobraontheWorldWideWeb:
FrequentlyAskedQuestions
(FAQ)canbefoundon-lineat:
www.cobraelec.com
Our Thanks to You
A3
A2
1. 6-PinMicrophoneConnector
2. PowerOn/Off/Volume
3. Squelch
4. ToneControl
5. RFGain
6. BandSelector
7. ChannelSelector
8. LEDChannelDisplay
9SoundTracker™LED
10. RX(Receive)/TX(Transmit)
LEDIndicator
11. SoundTracker™On/Off
12. Channel19/Channel9/
NormalSwitch
13. DimmerSwitch
14. CB/PASwitch
15. NB/ANLANL/OffSwitch
16. SignalStrengthMeter
17. Microphone
RearPanel
18. PublicAddressSpeakerJack
19. ExternalSpeakerJack
20. AntennaConnector
21.PowerJack
12 4 5
36
20 21
16 9
10
18 19
12
1314
15
17
8
11
7
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How to Use Your
Cobra GR 25 LTD ST
Contents
Section A (English)
Features...........................................................................................1
Included Accessories.................................................................A1
Controls & Indicators ................................................................A2
OurThanks to You......................................................................A3
SoundTracker™
Installation
Location.......................................................................................2
Mounting and Connection...................................................2
Antennas
CB Antenna................................................................................6
Marine Installation...................................................................6
Ignition Noise Interference ...................................................7
Operating Your GR 25 LTD ST
Turning On Your CB.................................................................8
Setting Channel Selector.......................................................9
To Receive...................................................................................10
Selecting a Channel................................................................10
Selecting a Channel from Microphone............................11
S-Meter.........................................................................................11
SoundTracker™System.........................................................12
Activating SoundTracker™..................................................13
NB,Off (Noise Blanker) Switch.............................................14
Bright/Mid/Dim Switch..........................................................15
RF Gain Control.........................................................................15
Setting Squelch.........................................................................16
ToTransmit.................................................................................18
Setting Tone Control...............................................................19
Transmit.......................................................................................20
RF Meter......................................................................................20
External Speaker.......................................................................21
PA (Public Address)..................................................................22
Temporary Mobile Set-Up.....................................................24
Home And Office Set-Up.......................................................25
How Your CB Can ServeYou...................................................26
A Few Rules You Should Know............................................26
Local Laws or Regulations....................................................27
CB 10 Codes...............................................................................28
Frequency Ranges......................................................................30
GR 25 LTD ST Specifications..................................................31
Optional Accessories.................................................................32
Deutsch................................................................................Abschnitt B
Español.....................................................................................Sección C
Français....................................................................................Section D
Italiano .....................................................................................Sezione E
Featuresof ThisProduct
• 40GermanFMChannels
40European(CEPT)Channels
12GermanAMChannels
• SoundTracker™System
• Heavy-DutyDynamic
MicrophonewithChannelChanger
• Full4WattsRFPowerOutput
• InstantChannel19and9
• FrontPanel6-PinMicrophone
Connector
• SwitchableNoiseBlanker-
AutomaticNoiseLimiter
• RFGain
• PAFunction
• 2.75-metre(9-foot)Microphone
Cord
1
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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 interferewith the driver 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-
tappingscrewsandstar
washers.Themountingmust
bemechanicallystrongand
convenientlylocated.
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
Connectingtoafusecircuit
controlledbytheignitionswitch
preventstheunitfrombeingleft
onaccidentally,andalso
permitsoperatingtheunit
withoutrunningtheengine.
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 the right side
of the unit (nearer the
driver) using two screws
supplied.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
Note
Beforeinstalling theCB radio,
visuallycheck thevehicle’s
batteryconnection todeter-
minewhich terminal,positive
ornegative,is earthedto the
engineblock (orchassis). A
negativelyearthed vehicle
hasits negativelead earthed
tothe chassis.
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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 25 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.
Marine Installation
The transceiver will not operate at maximum effi-
ciency in a boat without an earthing 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
passengercarstheideal
antennalocationisonthe
centreoftheroof.Second
choiceisonthecentreofthe
boot.
Note
Antennabracketmustbe
earthedtothechassisofthe
vehicle.
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/OffVolume knob clockwiseto
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
Setting Band Mode Selector
Setting Band
Mode Selector
To operate in EU band,set control to EU,to
operate in DE band, set to DE,and to operate
in AM band, select AM.
1
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Rotate the On/OffVolume knob clockwise.
The green RX/TX LED will be illuminated.
Operation
11
Operation
10
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
Switchto9or19(Information)
forinstantaccesstothese
channels.
To Receive
1
To Receive
Selecting A Channel from Microphone
Channels can also be selected by pressing the
UP and DOWN buttons on top of the
microphone.To lock channel,press and release
the LOCK button.
1
Selecting a
Channel from
Microphone
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OperationOperation
1312
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
significantly ,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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