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Channel Select Using Radio Knob
Allows for the manual selection of all the VHF marine
channels that have been established for use in the U.S.A.,
Internationally and in Canada.
NOTE
This knob will also allow scrolling in many of the
setup and advanced operation menus.
When the Channel Select knob on the radio is turned in a clockwise rotation, higher
numbered VHF marine channels can be accessed. When the Channel Select knob on
the radio is turned in a counterclockwise direction, lower numbered VHF marine
channels can be accessed.
Channel Select Using Microphone
By pressing microphone Channel Up button, higher numbered VHF marine channels
can be accessed. By pressing the microphone Channel Down button, lower
numbered VHF marine channels can be accessed.
Local Mode Button
The radio features a Local Mode button that decreases radio
sensitivity when operating inside populated areas.
■
When the Local Mode button is On, the power of an
inbound receive (Rx) signal is reduced without distorting
the waveform. Reducing an inbound signal power prevents
“noise interference” from random RF Noise in populated
marinas, cities and commercial areas. When the Local
Mode button is On, the “Local On” icon displays.
■
When the Local Mode button is Off, the radio receives a
full signal with an extended operational range.
Channel Preset (Function) Buttons
Use the Channel Preset buttons for direct access to favorite
channels in the Standby mode and as selection keys in the
Setup mode.
■
When a Channel Preset button is pressed and released, the
radio goes directly to the assigned preset channel. If no preset
channels are assigned, three (3) error tones sound. After the
button is released, the radio returns to the Standby mode.
■
When a Channel Preset button is pressed and held for
more than two (2) seconds, the working channel will be
assigned to the button.
Nothing Comes Close to a Cobra
®
27
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English
Power On-Off – Volume/Squelch
On-Off
Transceiver power can be turned On or Off by using the On/Off — Volume rotary
concentric knob located at the upper right-hand side of the radio.
Volume
Volume is controlled by turning the On/Off Volume rotary
concentric knob. The radio speaker is located on the left side
of the display.
To increase the volume, turn the Rotary knob clockwise.
To decrease the volume, turn the Rotary knob
counterclockwise.
Squelch
Squelch control is controlled by turning the inner (back)
rotary concentric knob located directly behind the On/Off –
Volume knob. With the power On, turn the knob
counterclockwise till you hear a hissing sound, then turn the
knob clockwise till the hissing stops. This will establish a
“Baseline” squelch.
By turning the knob further in a clockwise direction, you will filter weak and
medium-strength signals. By turning the knob further in a counterclockwise
direction from your baseline setting, you will receive weaker signals.
Squelch control filters weak signals and radio frequency (RF) noise so that you will
clearly hear the signals you want.
NOTE
If the Squelch is set so that you can hear a continuous hissing sound, the
Memory Scan and Tri-Watch functions will be blocked.
Getting StartedGetting Started
Operating Your Radio
Operating Your Radio
Channel Preset Buttons
SELECT
MEM
Channel Select Knob
On/Off Power/
Volume Knob
Squelch Knob
Local Mode Button
MRF80BD_MANL_INSTALL:QXP-1058720374.qxp 12/9/10 10:34 AM Page 38