Cobra Electronics 19 Ultra III - Manual (Page 6)

Operation
•
Selecting a Channel
Rotate the Channel knob clockwise
until desired channel is displayed.
Channel 9/NOR/Channel 19
Set CH 9 to obtain instant access
to the emergency channel.
Set NOR position to use the channel knob
to choose any of the 40 channels.
Set CH 19 to obtain instant access to
the information and calling channel.
CB/PA
In the CB position, the PA function is disabled
and the unit will transmit and receive on the
selected channel. The PA function should not
be used unless a PA speaker is connected. In the
PA position, the transmit function is disabled and
the microphone output will go only to the PA speaker.
S/RF Power Meter
Shows relative transmitter RF output power
and input signal strength when receiving.
The Liquid Crystal Display (LCD) segments
increase with signal strength.
TX Indicator
The TX Indicator will light when in the
transmit mode. “Busy” will appear when
there is an incoming signal.
7 Nothing Comes Close to a Cobra ® 6 English
Operation
•
Squelch
This control is used to cut off or eliminate receiver background noise in the absence
of an incoming signal. Adjust until the receiver noise disappears. This will require the
incoming signal to be slightly stronger than average receiver noise. Further clockwise
rotation will increase the threshold level which a signal must overcome in order to be
heard. Only strong signals will be heard at a maximum clockwise setting.
Squelch is the “control gate” for incoming signals.
To squelch your radio:
1. Full clockwise rotation closes the gate,
allowing only very strong signals to enter.
2. Full counterclockwise rotation opens
the “gate,” allowing all signals in.
3. To achieve the Desired Squelch Setting (DSS),
turn the Squelch control counterclockwise until
you hear noise. Now turn the control clockwise
just until the noise stops. This is the DSS setting.
Channel Selector Knob
Channel 9/NOR/Channel 19 Button
CB/PA Button
S/RF Power Meter
TX Indicator
Operating Your Mobile Radio
Operation Operation
Operating Your Mobile Radio
Adjust Squelch/RF Gain Knob
Gate Closed
Strong Signals
Medium Signals
Weak Signals
Noise
Gate Open
Strong Signals
Medium Signals
Weak Signals
Noise
Desired Squelch Setting (DSS)
Strong Signals
Medium Signals
Weak Signals
Noise