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 | 131
FOR SIMULATION USE ONLY ā NOT A TRAINING AID
NAV TUNE - XPDR
The NAV TUNE - XPDR allows pilots to view and change the transponder status,
code, mode, and standby code.
The aircraft is fitted with an altitude reporting, Mode S transponder which replies to
ground station and airborne interrogations.
Control of the transponder is provided through the UFCP.
Key Window Action
NAV TUNE -
XPDR
XPDR
W1 - Displays XPDR and the options ACT and SBY.
Selecting W1 toggles between the active
(XPDRACT) or standby (XPDRSBY) mode.
If the XPDR is 'not responsive' and W1 button is
pushed in an attempt to switch to ACT mode, the
system reverts to SBY if the XPDR equipment
remains 'not responsive'.
W2 - Displays data indicating the current
transponder mode code.
Pressing W2 activates the W2 data entry mode and
allow the transponder mode code to be changed
via the alphanumeric keyboard and pressing ENT
button.
When the transponder mode code is changed, the
change is reflected on the displays of both crew
stations (front and aft).
The data entry range for Transponder Mode Code
is 0000 to 7777.
ALT ON or
OFF
W3 - Displays ALT and the options ON and OFF.
Pressing W3 toggles IFF mode 3 and altitude
encoding between ON and OFF.
W4 - Has no display or control functionality.
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