COBHAM SAILOR SP3550 Portable UHF, User Manual, Page: 16 / 56

Operation
8
Using the UHF
Basic functions
Switching the radio on and off
• To switch the radio on , turn the knob at the top
of the radio clockwise .
The display lights up showing the last used
channel and the battery level.
• To switch the radio off , Turn the knob back
counter-clockwise until it clicks.
Selecting the working channel
• To select channel D , press the D/P0 key.
• To select among all available channels , press

or

on the keypad.
For fast selection, press and hold

or

.
The display shows the currently selected channel. The bottom left corner
of the display shows “
Dup
” if the channel is a semi-duplex channel.
Note
Before using the radio, mount the antenna at the top of the
radio. The antenna is delivered with the radio.
Note Long press on

or

can also be used to select preferred
channels. For information on how to program preferred
channels, see Configuring the radio on page 17.
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