To Squelch Your Radio:
1.
With the
Squelch
knob turned fully counter-clockwise, turn
the
On-Off/Volume
knob clockwise until you hear
a hissing (noise) sound.
2.
Turn the
Squelch
knob clockwise until the hissing
sound stops.
Turning the
Squelch
knob further clockwise (higher barrier)
will filter weak and medium strength signals until only the
strongest signal can get through at the highest squelch setting.
The Squelch bar graph will be shown to indicate the Squelch
setting. 2 seconds after finishing the Squelch adjustment, the
radio will return to the
Standby
mode.
To Receive Weaker Signals:
1.
Turn the
Squelch
knob counterclockwise (lower barrier).
If the squelch is set so that you can hear a continuous hissing
sound, the memory scan and tri-watch functions will be blocked.
Standby And Receive
Standby
mode is the usual mode for the radio whenever it is
turned
On
.
From Standby Mode, You Can:
n
Change your radio’s settings using set-up routines.
n
Receive messages on the current channel as well
as DSC messages.
n
Listen and Receive NOAA alerts if
Weather Alert
mode is
turned
On
.
n
Switch to
Transmit
mode using the
Talk
button.
While the radio is in
Standby
mode, the
Receive
mode is
entered whenever a strong enough signal to break squelch is
sent to the radio. You will hear the message through whichever
speakers are connected to the radio.
To Change The Channel You Are Listening To,
You Can Choose One Of The Following:
a.
Press the
Up/Down
buttons. This will take you to
the next higher or lower VHF channel. For rapid
advance, press and hold the
Up
or
Down
button.
b.
Press the
Channel 16/9
button. This will take
you to Channel 16 with one (1) press and to Channel 9 with
a second press. Additional presses will toggle between
Channels 16 and 9 and the current user selected channel.
Nothing Comes Close to a Cobra
®
27
26 English
c.
To listen to the
Weather Radio
press the
WX (Weather)
soft key. This will activate the weather radio mode. When
in
the
Weather mode
, the
Up/Down
buttons will change
the weather channel.
d.
Press and release the
Back
softkey to return the radio to
Standby Mode
.
HI/LO Transmit Setting
•
Transmit Power Output
Your radio can
Transmit
selectively at one (1) or 25 watts of power. Cobra
®
suggests
you maintain the low power setting for short-range communications and to avoid
overpowering nearby stations with your signal. Use the high power setting for long-range
communications or when you do not receive a response to a signal sent at one (1) watt.
To Toggle Between The High And Low Power Modes:
1.
Press the
High/Low Power
button. The LCD will show which
mode is in effect.
Some channels are restricted to use at a maximum of one
(1) watt. Your radio will automatically set the power to
Low
Power
mode when you select those channels.
While using the U.S.A. channel map, if, in an emergency,
you need to increase the output power on Channel 13 and
Channel 67 for your signal to be heard, you can override the
Low Power
mode by pressing and holding the
High/ Low
Power
button.
Transmit a Message
1.
Check to see that your unit is set to a proper channel for the
type of message you plan to send.
2.
Toggle to the low power setting.
3.
With the microphone about two (2) inches [five (5) cm] from
your mouth, press and hold the
Talk
button and speak into
the microphone. Transmit will be indicated on the LCD.
4.
Release the
Talk
button when you are finished speaking. Your
unit can only operate in either the
Transmit
or the
Receive
mode at any given time. You will not hear the response to your
message unless the
Talk
button is released.
NOTE
If the
Talk
button is held down for five (5) minutes, the radio will
automatically cease transmitting to prevent unwanted signal generation.
As soon as the
Talk
button is released, it can be pressed again to
resume transmission.
Weather Button
Squelch Knob
Lower Barrier
Standby Mode
Getting Started
Getting Started
Operating Your Radio
Operating Your Radio
Turn Till Hissing
Sound Stops
Up/Down Buttons
Channel 16/9 Button
Squelch
High/Low Power Button
TW CALL SCAN more
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no gps Data
1W
USA
MRF77W GPS E & MRF77B GPS E LCD POP LABEL 1:1
55mm Wide x 30mm High
REV. 12.9.2014
55.00
30.00
21:12 11/11
25.53.438N
110.27.843W EMERG
SCAN MORE
INT 25W
TW
MEM
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