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M
The message key is used to view system messages. This key is also used to
access the GNC 250XL’s unit settings. See Section 6 for more information
on messages and unit settings.
@
The transfer key flip-flops the active and standby frequencies.
\
The clear key is used to erase information or cancel an entry.
E
The enter key is used to approve an operation or complete data entry.
It is also used to confirm information, such as during power on.
C
The cursor key is used to activate or deactivate the cursor in the separate
areas of the GNC 250XL. Pressing once will activate the cursor in the
comm ‘window’ and enable the pilot to change frequencies. Pressing twice
will activate the cursor in the GPS window (indicated by highlighted
characters in a GPS window field). It is used to highlight fields for data
entry, changing information or cycling through available options.
O
The outer knob is used to advance through pages, advance the cursor
or move through data fields.
K
The inner knob is used to change data or scroll through information that
cannot fit on the screen all at once.
viii
This manual will describe entering data using the
K
and
O
knobs. Experiment with them and become efficient
in entering data with the concentric knobs. This will greatly
reduce the amount of time required to navigate with the
GNC 250XL.
INTRODUCTION
Key and Knob
Functions
250xl manual 2 7/17/98 1:26 PM Page viii