T-45C TS, ADV & IUT ENG-21
CNI System
The following should occur:
(c) The TACAN bearing pointer and digital
bearing will indicate 180 + 2.5 degrees
(d) Range will read 0 + 1 NM
(e) The CDI bar will be centered
NOTE: The indications of a valid
TACAN BIT test are: TACAN bearing
pointer and digital bearing - 180 + 2.5
degrees - Range reads 0 + 1 NM - CDI
centered.
NOTE: The system initiates an auto-
test when lock-on is broken.
4.
Aircraft Interfaces - TACAN System
a.
Power
Fig 10: CNI Input
Power Sources
(1) 28 VDC essential services bus: TACAN RT,
control panels, COMM control panels
(2) 115 VAC essential services bus: TACAN
(3) 26 VAC essential bus: TACAN RT, control
panels
b.
Inputs
(1) RF TACAN magnetic bearing and distance
measurement signals
(2) COMM/NAV control transfer panel signals
RT as to which cockpit has control
Page 21-35
(9-98) Original
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