Cobra 75 WX ST Operating instructions

How to Use Your
Cobra 75 WX ST
Contents
Features...........................................................................................1
The CB Story..................................................................................A1
FCC Regulations
FCC Warnings
Included Accessories
Controls & Indicators................................................................A2
OurThanks to You ......................................................................A3
Customer Support
Installation
Connector Box Location........................................................2
Mounting Connector Box.....................................................3
Mounting and Connections.................................................4
ConnectingWires.....................................................................6
Microphone Hnager................................................................7
Antenna.......................................................................................8
Speakers......................................................................................9
Noise Interference...................................................................9
Operating Your 75 WX ST
Turning On Your CB.................................................................10
Setting a Channel.....................................................................10
SoundTracker System.............................................................11
Activating SoundTracker.......................................................12
Testing SoundTracker.............................................................13
Setting the Squelch.................................................................14
LCD Readout..............................................................................16
Receive/Transmit......................................................................17
Emergency Channel 9 & 19..................................................18
Key Lock.......................................................................................20
Frequency Display ...................................................................21
All Channel Scan.......................................................................22
Weather Channel......................................................................23
Channel Saver............................................................................24
Memory Channels....................................................................25
DualWatch.................................................................................26
How Your CB Can Serve You...................................................28
A Few Rules You Should Know............................................28
Channel 9 Emergency Messages.......................................29
CB 10 Codes...............................................................................30
Frequency Ranges......................................................................32
Weather Channels ......................................................................33
75 WX ST Specifications ..........................................................34
Warranty Information ..............................................................35
Optional Accessories.................................................................36
Order Form ....................................................................................37
If You Think You Need Service .............................Back Cover
FeaturesofThisProduct
• SoundTrackerSystem
• 40CBRadioChannels
• 10WeatherChannels
• One-TouchEmergency
Channel9
• One-TouchInformation
Channel19
• RemoteMountInstallation
System
• FullFeaturedLCD
DisplayPanel
• SquelchControl
• KeyLock
• ChannelSaverCircuitry
• DualWatchChannelMonitor
• FullChannelScan
• FourMemoryLocations
• 10FootFlexibleCord
• QuickDisconnect
1
75 WX ST Manual(5188) 2/5/01 3:00 PM Page 1

Installation
3
Mounting
Connector Box
Mounting Connect Box
Note
Makecertainthatnothing
willinterferewiththe
installationofmounting
screws,beforedrilling
holes.
Hold Cobra 75 WX ST Connector Box in exact
location desired for mounting.
Using it as a template,mark the location for
the mounting screws (included.)
1
2
Mount Connector Box as shown.
3
Location
Note
Donotmountunderthe
hood,nearheatductsor in
directlineofthecar’s
heater.
Under the Front
Seat Installation
FireWall
Installation
Location
Under the Front Seat Installation
Mount your Cobra 75 WX ST Connector Box in
a convenient location,away from moisture and
direct sunlight,in a location that will not
interfere with driving.
Cobra suggests mounting it either under the
front seat or on the fire wall.
2
Installation
75 WX ST Manual(5188) 2/5/01 3:00 PM Page 2

InstallationInstallation
Mounting and Connections
The Junction Box is held by two screws,permitting
mounting in the manner most convenient for
your installation.
Mounting hardware is supplied for mounting the
Junction Box.The mounting must be mechanically
strong and alsoprovide agoodelectricalconnection
to the chassis of the vehicle. Proceed as follows to
mount junction box:
Mounting and
Connections
5
Caution
Leavingthe75 WXSTonafter
yourcaristurnedoffcan drain
yourcarbatterywhenconnected
toaconstant 12voltsource.
When connectedtoanaccessory
12voltsourcetheunitwillturn
offwhenvehicleisturnedoff.
4
Afteryou have determined the mostconvenient
location in your vehicle, hold the Cobra HH-75
WX ST Junction Box in the exact location
desired. If nothing will interfere with mounting
it in the desired position,use the Junction Box
as a template to mark the location for the
mounting screws.Before drilling the holes,
make sure nothing will interfere with the
installation of the mounting screws.
1
2
3
Connect the antenna cable connector to
the antenna receptacle on the unit. Most CB
antennas are terminated with a type PL-259
plug and mate with the receptacle.
For constant 12 volt source power,connect
the red wire marked“BATT(+)”directly to the
positive side ofthe battery or to a connection
on thefuseblock that is always on.
4Connect theblackwiremarked“Ground”to the
negative side of the car,usuallythechassis.Any
other location with good electrical contact paint
removed will also work.
Removerubber grommet from metal
mounting plate (1).
5
Mounting and
Connections
75 WX ST Manual(5188) 2/5/01 3:00 PM Page 4

Installation
6
Connecting
Wires
Installation
7
Hold microphone hanger in location desired
for mounting.Make certain that nothing will
interfere with the hanger’s installation.
Mark the location for the three mounting
screws (screws included).
1
2
Drill and mount microphone hanger.
3
Installing
Microphone
Hanger
Installthe metalmounting plate onany flat
surface with the two screwsprovided.
6
Insert junction boxmic connector through the
holein the metalplate (2).
7
Slip rubbergrommet over the black connector
cable,thenpress thegrommetinto themetal
mounting plate hole (2&3).
8
Slide micconnector into rubber grommet.
9
75 WX ST Manual(5188) 2/5/01 3:00 PM Page 6

InstallationInstallation
The alternator and ignition system in your vehicle
may limit your ability to receive low signal levels.
Other noise interference can be the result
of several different installation variables.Consult
your Cobra dealer or a 2-way radio technician to
help locate and correct the source of severe noise
interference.
CB Antenna
For the most reliable
operation and maximum
range, Cobra recom-
mends using a vertically
polarized, quarter wave
length whip antenna
(illustration A).
Shorter,loaded-type
whips are adequate when
maximum range is not
required (illustration B)
Ignition Noise Interference
External Speaker Installation
CB Antenna
Installation External
Speaker
Installation
9
Note
Mobileinstallations(cars,
trucks,boats,etc)should be
madeonlywithanon-direc-
tionalantennasystem.
Astandardantennaconnector
(TypeSO-239)isprovidedon
theConnectorBoxforeasy con-
nectiontoastandardPL-259
cabletermination.
Cobraantennamodelsare
recommended;see your
localCBdealerororderdirectly
fromCobra.Seeorder form
onpage39.
Formaximumefficiency inboat
installations,agroundplateis
required,unlessthevesselhas a
steelhull.Consultyour CBdeal-
erforinformationregardingan
adequategroundingsystem.
8
Mount external speaker in desired location.
Plug jack into the back of the Connector Box
labled EXT.
*The external speakershouldhave4-8ohms
impedance and beabletohandle at least4 watts.
B
A1
2
Ignition Noise
Interference
75 WX ST Manual(5188) 2/5/01 3:00 PM Page 8

Rotate the power
ON-OFFVolume
Controlclocwise.
While previous systems only“blanked out”or
limited noise in higher sound frequencies,the
revolutionary new SoundTracker Systemactually
reduces noise while leaving the signal intact in
thereception mode.In the transmissionmode,it
actually strengthens the signal,providingyou with
a significant reduction innoise on reception and
transmission.
On Reception–
“Cuts Noise Coming In”
With anormal CB,distant signals fall below
thesquelch level andare unintelligible.With
a SoundTracker 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 youto significantly reduce the
squelch level,which greatly expands your
listening range.
OnTransmission–
“Strengthens Signals Going Out”
A SoundTracker 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.
Operation
11
Operation
TurningYour
CB On Soundtracker
System
Selecting a
Channel
10
Turning On Soundtracker System
Selecting a Channel
1
Turn the Squelch
Control counter
clockwiseuntil
noise is heard.
1
Adjust volume to a
comfortable level.
1
Change channelsby
pressing either the
channel ▲ up or
channel ▼ downkey.
To quick-advance
channels,press and
hold either key.
1
2
Note
Soundclarityismeasuredby
theratioofthesignallevel
tothenoiselevel.Thehigher
thesignal-to-noiseratio,the
betterthesound.
75 WX ST Manual(5188) 2/5/01 3:00 PM Page 10

Operation
13
Operation
12
Testing
Soundtracker
Testing Soundtracker
Pressandrelease the Sound-Tracker key.
will be displayed on the LCD readout.
1
2
Activating
Soundtracker
Activating Soundtracker
ST Select any unused
channel on your CB.
Open the squelch
control fully by
turning the knob
counterclock-wise
until it stops.
Turn the volume
up louder than your
normal listening
level.
Pressandrelease
the SoundTracker
key. Notice the
ignificant reduction
in noise.
1
2
3
4
75 WX ST Manual(5188) 2/5/01 3:00 PM Page 12

OperationOperation
1514
Setting the
Squelch
Gateopen
Gateclosed
Setting the
Squelch
If you turn the squelch control fully counter-
clockwise,it lowers the“squelch gate”so low
that everything gets through - noise, weak
signals and strong signals.
To set the “squelch gate”to the DSS-Desired
Squelch Setting, turn the squelch control
counterclockwise until you hear noise.Then
turn the squelch control back clockwise just
until the noise stops. Now only strong signals
get through.
The Desired Squelch Setting, (DSS) only allows
actual transmissions to come through. This
effectively blocks out unwanted noise.
Setting Squelch
6
5
Setting Squelch
Turn CB on by turning the volume
control clockwise. Adjust the volume to
a comfortable level.
Before setting the squelch control on yourradio,
you must select a channel that is not in use.
2
Turn on SoundTracker
3
To achieve the Desired Squelch Setting
(DSS):Think of your Squelch Control as a gate
for incoming signals.If you turn the Squelch
Control fully clockwise, it raises the“squelch
gate”so high that no signals get through.
4
1
75 WX ST Manual(5188) 2/5/01 3:00 PM Page 14

1716
Operation Operation
To Transmit
To Transmit
LCD Display
Press the Press-To-Talk
(PTT) key.
1
Release the PTT
button and you will
automatically be in the
receive mode again.
4
The TX icon will appear.
Hold the microphone about 2 inches from
your mouth and speak in a normal voice.
3
LCD Display
Your Cobra 75 WX ST CB is designed with a
liquid crystal display that indicates channel
number,or frequency and the operating mode.
2 digit channel display / 5 digit frequency display
= Memory Indicator/Number
= Scan Indicator
= Dual Watch Indicator
= Lock Key Indicator
= Emergency Channel 9
= Function key indicator
= Amplitude Modulation
= Weather Station
= Receive Indicator
= SoundTracker indicator
= Transmit Indicator
Signal Strength Meter
TX
ST
RX
WX
AM
EMG
LOCK
DW
SCAN
M
F
To Receive
Your 75 WX ST is automatically in the receive
mode and is illuminated.
RX
1
2
To Receive
Note
ToavoiddamagingtheLCD
display,donotsubjectyour CB
radiotoextremetemperatures
(below-5°Forabove140°F)for
extendedperiodsoftime.
Caution!
Besuretheantennaisproperly
connectedtotheradiobefore
transmitting.Prolongedtrans-
mittingwithoutanantenna,
orapoorlymatchedantenna,
couldcausedamagetothe
transmitter.
Besuretoreadthe F.C.C.Rules
andRegulationsincludedwith
thisunitbeforetransmitting.
75 WX ST Manual(5188) 2/5/01 3:00 PM Page 16

To Access emergency channel 9, press Channel
9/19 key once.
1918
Emergency
Channel 9 or
Information
Channel 19
Operation Operation
14You are now on information channel 19.
Toaccessinformation channel19,pressChannel
9/19keyagain.
Youare nowonemergencychannel9 and
the icon will appear.
EMG
2
3
Press 9/19 again to return to the original
channel selected.
Original channel.
5
6
One Touch
Channel 9
and 19
75 WX ST Manual(5188) 2/5/01 3:00 PM Page 18