T-45A UJPT, E2-C2, ADV, & IUT Eng-21
CNI System
k.
Antenna (ANT) switch
(1) TOP: selects forward antenna
(2) DIV: diverse setting; antenna is
automatically selected by tran-
sponder
(3) BOT: selects aft antenna
4.
Aircraft interfaces--IFF system
(transponder)
a.
Power: 28 VDC essential services bus
b.
Logic that enables and controls
selection of the various RT operating
modes including BIT
c.
Receives digitally encoded altitude
supplied by the fwd cockpit barometric
altimeter
d.
Transmits signals on fwd or aft
antenna
e.
Interfaces with ground-based,
shipboard, and airborne stations for
identification and air traffic control
purposes
f.
When activated, ejection seat initiates
transmission of emergency code 7700
(8-03) Original
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