Cobra 25nwst Cb Tranciever Manual

How to Use Your 
Cobra 25 NW STContents
Features...........................................................................................1
The CB Story..................................................................................A1
FCC Regulations
FCC Warnings
Included Accessories
Controls & Indicators................................................................A2
Our Thanks to You......................................................................A3
SoundTracker™
Customer Support...

Installation Installation
Location32
Mounting and
ConnectionMounting 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  inte rfe re with the dri ver or passenger.
The transceiver is usually...

Installation Installation54Note
Before installing the CB radio,
visually check the vehicle’s
battery connection to deter-
mine which terminal,positive
or negative,is grounded (pos-
itive is the larger of the two)
to the engine block (or chas-
sis).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 per-
mits operating the unit without
running the engine.
Note
In positive ground...

Ignition Noise Interference AntennasUse 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 back-
ground 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...

The     CB/PA button should be in the 
CB position.Operation9Operation
Turning OnSetting Channel
Selector 8Turning On 
Make sure the power cord,antenna and micro-
phone are connected to their proper connectors
before starting.Setting Channel Selector 21
Ro t ate the On/Off Volume knob       c l oc kw i s eto
a normal listening level.Selectone of forty channels and adjust 
volume. The selected channel is indicated by
the LED readout directly above the channel
selector knob125 NWST Manual3.3  6/15/99 12:43...

Rotate the       On/Off Volume knob clockwise
the green RT/TX LED will be illiuminated.Operation11Operation10
S-MeterS-Meter
Swings proportionately to strength of incoming
signal when receiving.
SwitchtoNOR to select desired channel.1
Selecting A
ChannelSelecting A Channel
Note
Switch to 9 (Emergency) or 19
(Information) for instant access
to these channels.To Receive1
To Receive25 NWST Manual3.3  6/15/99 12:43 PM  Page 10 

Operation Operation1312
Activating
SoundTracker™Push and releasethe        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...

Operation Operation1514
RF Gain Control Dimmer ControlRF Gain Control
The RF Gain is used to optimize reception in
strong or weak signal areas.Dimmer Control
Note
The RF Gain is used to optimize
reception in weak signal areas.Rotatethe       DIM knob clockwise for
maximum brightness;counter-clockwise
for minimum.
Rotatethe       RF Gain knob counterclockwise
to reduce gain in strong signal areas.In weak 
signal areas turnclockwiseto increase gain.11 Note
The Dim controls the brightness
of the front...

To achieve the Desired Squelch Setting (DSS),
turn the Squelch control       counterclockwise
until you hear noise. Now turn the control
clockwisejust until the noise stops. This is the
DSS setting.1716OperationOperation3Gate set to Desired 
Squelch Setting (DSS)To Transmit
To TransmitCaution!
Be sure the antenna is properly
connected to the radio before
transmitting. Prolonged trans-
mitting without an antenna,or
a poorly matched antenna,
could cause damage to the
transmitter.
Be sure to read the...

Setting Dynamike
This controls the microphone sensitivity
(outgoing audio level).1918Setting
Dynamike
OperationOperation1
Initially,set fully       clockwiseso that maxi-
mum voice volume is available. Dynamike
may have to be reduced in some conditions.Transmit
Push and holdmic button to transmit.
Transmitter is now activated. When transmit-
ting,hold the microphone two inches from
your mouth and speak in a clear,normal voice.
Releaseto receive.1
Transmit
RF MeterRF Meter
This meter swings...