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Uniden MHS550 Radio Owner’s Manual
until you locate the one with the best reception.
Press WX/ALERT to return to marine Channels 1 to
88A.
Selecting a Channel
To receive marine transmissions and transmit signals,
select a working channel. When you rst apply power,
the screen displays the default band (Marine USA),
the default power setting (5 Watts), and the battery
power level icon.
To change the channel, press ▲ or ▼. The default
channel names appear next to the channel numbers
along the left border of the screen. To change
(personalize) the channel names, see Page 40.
Setting the Transmitting Power Level
You can select the transmitting power for all channels except
those designated as Receive Only or Low Power Channels
(see the Status column of the Frequency Charts for more
details).
Repeatedly press and hold BAND/1/2.5/5W for about 3
seconds. Each time you press the key, the power output
level changes and the corresponding icon appears on the
display. A rapid double beep sounds to conrm the change.
Note: for those channels designated as 1W maximum, even
though you have set the power level to either 2.5 or 5W,
1W is displayed and used. Channels 13,17,67, and 77 in
the US are an exception. Normally these channels are also
designated for normal operation as 1W channels. However,
in emergency, if you press and hold the PTT switch and at
the same time you momentarily press 1/2.5/5W, the power
level changes from 1 to 5W with the Li-Ion battery or 1 to
2.5W with alkaline batteries installed.
You cannot override the 1W power level setting for
6.
1.
2.