Bandix
Avionics
Division
ADF-T12C/D AUTOMATIC
DIRECTION FINDER SYSTEM
Installation
Manual
f
2-7.B.
Maintain asteady heading and observe the indicator pointer as the aircraft approaches
and passes over the station. The pointer should oscillate slightly and as the cone of
silence is passed, should abruptly swing to areading of 180 degrees from the original
bearing indication.
(9) Maintain heading until the station is passed. If pointer reversal is unsatisfactory,
the information in table 2-2 may help in determining the trouble.
INSTALLATION OF CW OSCILLATOR KIT OPTION (Part Number 2VQ17-01)
Refer to ADF-T-12B/C Maintenance Manual, I.B. 2012A, for complete instructions.
(8)
2-8.
INDICATION
P O S S I B L E C A U S E
Reversal before entering cone of silence
Top sense antenna element too far aft, or
bo t tom sen s e a nten n a elem e nt too far for w ard.
(
Reversal after reaching cone of silence.
Top sense antenna element too far forward,
o r b o t t o m s e n s e a n t e n n a e l e m e n t t o o f a r a f t .
Extended area of confusion. Excessive
p o i n t e r o s c i l l a t i o n .
Sense antenna too long or too short.
Excessive quadrantal error.
Loop incorrectly located or possibly aresult
of change in aircraft configuration.
O P E R AT I O N A L P R O B L E M S A N D P O S S I B L E C A U S E S
T A B L E 2 - 2
c
I.B. 2012-1
2-12
Revised Oct/72
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