I A P 2 0 2 3 . 0 0 1 - A F M / I R I S T E X A N I I P A G E | 105
FOR SIMULATION USE ONLY – NOT A TRAINING AID
edit), or • (edit or press and hold for set value) displayed in the first character
position of the window indicating that the data in the window can be modified using
the alphanumeric keyboard.
The current data is shown in the window, with the label (if any) starting in the
second character position of the window, and the editable data right justified.
Leading zeros in the editable data are not displayed unless specified for a particular
data item.
Modifying data is accomplished by keying the data on the alphanumeric keyboard
(AKB) followed by pressing the ENT key.
For entering communication radio or radio navigation aid frequencies, the values
are directly entered on the alphanumeric keyboard. Decimal placement is required
for frequencies, trailing zeros are not required with UHF/COM1 and trailing 5s are
not required for xxx.x25 or xxx.x75.
Trailing 5s are required for VHF/COM2.
Modifying data using the alphanumeric keyboard is initiated in an active data entry
window by pressing an alphanumeric keyboard key, which enters the selected
character into the rightmost position, causes underscores to be placed in all other
positions available for data entry, and causes the window display to flash.
Once the alphanumeric entry has been initiated, numbers can be entered using the
alphanumeric keyboard, and letters can be entered by pressing the associated
number key and then rotating the Data Entry Knob until the desired character
appears in the window. To select the character, momentarily press the Data Entry
Knob. Characters entered from the keyboard appear in the rightmost position in the
window, and shift to the left as more characters are entered, replacing the
underscores as they shift.
Pressing the CLR key causes the most recently entered character to be removed
(shifting the remaining characters, if any, back to the right), and holding the CLR key
for 1 second causes all of the entered characters to be removed.
Once the desired data has been entered, press the ENT button for the entered data
to be checked for validity based on conditions that depend on the data item being
entered. If the data is determined to be valid, it is entered into the field, the
characters stop flashing, and the active edit () is returned to non-active (<). If the
data is determined to be invalid for that window, the characters flash until the entry
in the window is modified.
If the ENT key is pressed when the window has been cleared, the original data is
restored in the window, which is then reactivated for data entry. While
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