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Getting Started
Nothing Comes Close to a Cobra®25
24 English
Getting Started
Getting Started
Refer to the foldout on the front cover of this manual to identify the various
controls and indicators on your radio.
Throughout this manual you will be instructed to press or to press and hold
buttons on the transceiver. Press means a momentary press, then release; press and
hold means to hold the button.
Tones And Alarms
When your CobraMarine VHF radio is On, you can expect to hear the following tones
and alarms. The volume of these sounds is controlled by the circuitry in the radio and
is not affected by the volume set with the On-Off Power/Volume knob.
Confirmation Tone
Single high-pitched beep confirms all button presses except the Talk button.
It can be turned On or Off. See set-up routines on page 30.
Error Tone
Three low-pitched beep indicates an invalid button press.
DSC Distress Alarm
High—low—high—low—high. Pause, then repeat. The volume of all alarms will
increase after 10 seconds. Press any button to turn it Off.
NOTE
This alarm sounds only for DSC distress calls on Channel 70.
It does not sound for voice calls on Channel 16 — you still
must listen for those.
Distress Acknowledgement Alarm
High—low—high—low—high. Pause, then repeat. The volume of all alarms will
increase after 10 seconds. Press any button to turn it Off.
DSC Routine Call Alarm
High—pause—high—pause—high. Long pause, then repeat. Press any button to turn
it Off.
DSC Geographical Alarm
Loud, continuous, medium-pitched, high-low tones (warble) — sounds
when a geographical call is received. Press any button to turn it Off.
DSC Position Request Alarm
Medium-loud, continuous, low-pitched series of closely spaced, four (4) beeps [three
(3) short – one (1) long] groups — sounds when a position request call
is received. Press any button to turn it Off.
DSC Individual Alarm
High—pause—high—pause—high. Long pause, then repeat. Press any button to turn
it Off.
Power On-Off
Transceiver power can be turned On or Off by the On-Off Power/Volume
knob on the transceiver.
To Turn Your Radio On Or Off:
1. Rotate the Off Power/Volume knob clockwise to turn on
the transceiver. To turn off the transceiver, rotate the Off
Power/Volume counter clockwise until a “click” is heard.
When the radio is powered On, the confirmation tone
will sound.
The radio will return to the settings in effect when it was
last powered Off, the LCD will show the corresponding
information, and all controls will be operative. The radio
will then be in Standby mode.
Volume
The On-Off Power/Volume knob on the transceiver controls the
speaker volume. The volume adjustment applies only to what
you hear from the speaker and does not affect the volume of
your outgoing messages. That is controlled by the circuitry of
your radio. The volume bar graph will be shown to indicate
the volume setting. 2 seconds after finishing the volume
adjustment, the radio will return to the Standby mode.
To Increase The Volume:
Turn the On-Off Power/Volume knob clockwise.
To Decrease The Volume:
Turn the On-Off Power/Volume knob counter-clockwise.
Squelch
Squelch control filters weak signals and radio frequency noise so that you can more
clearly hear the signals you want. You can think of it as a variable barrier that blocks
what you don’t want to hear.
Operating Your Radio Operating Your Radio
On-Off Power/
Volume Knob
VOlume
On-Off Power/
Volume Knob
On-Off Power/
Volume Knob
MRF57E_MANL_INSTALL.indd 34-35 5/7/15 2:45 PM
15


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