Bendix
Avionics
Division
ADF-T12C/D AUTOMATIC
DIRECTION FINDER SYSTEM
Installation
Manual
r'
DESCRIPTION
CHARACTERISTIC
ADF-T-12C (201C/D)
ADF-T-12D (201F)
REC
70 fiv/m. For S+N/N =6db
Using 1/2 meter sense
antenna
10 jLiv input will produce 50
mw o u tp u t i n t o 5 0 0 - o h m r e ¬
sistive load with S+N/N ratio
of 6db.
4kHz at -6 db points 12 kHz
at -60 db points
Selectivity
(Bandwidth)
4kHz maximum at -6 db points
1 2 k H z m a x i m u m a t - 6 0 d b
points
7 s e c . m a x i m u m w i t h i n d i c a t o r
175° off bearing. Input signal
level=70pv/tn using l/2 meter
sense antenna.
50mw minimum capability with
an input signal level of 7Opv/m
u s i n g 5 m e t e r se n s e an t a n n a .
To satisfy most aircraft instal¬
l a t i o n s t h e m a x i m u m a u d i o o u t ¬
put on new units is set to 32mw.
S a m e a s T - 1 2 C
S a m e a s T - 1 2 C
Within 9db between 350
and 1400 Hz
S a m e a s T - 1 2 C
ADF Indicator
Speed (Settling Time)
Audio Output:
7 s e c o n d s m a x i m u m w i t h
indicator 175° off bearing
REC
70 ±5 mw a t 8pv min. in put at
2 0 0 k H z a n d V O L s e t f o r m a x .
102A
102B
3. 5wmaximum
10 wmaximum
Within 10 db between 200
and 2000 Hz
±1/4 db between 350 and
2 5 0 0 H z r e l a t i v e t o a 1 0 0 0
H z 1 - w a m p l i fi e r o u t p u t
500 ohms (Headset)
3ohms (Speaker)
±3° from 70 pv/m to 0. 5v/m
A E R e s p o n s e
with 102A/B
Output Impedance
with 102A/B
Bearing Accuracy
Operating Current
R e q u i r e m e n t s -
Single Systems:
Receiver
551A Indicator
551RL Indicator
5 5 I E I n d i c a t o r
102A Audio Amplifier
1 0 2 B A u d i o A m p l i fi e r
551C Indicator
Lighting:
Receiver
551RL Indicator
S a m e a s T - 1 2 C
S a m e a s T - 1 2 C
S a m e a s T - 1 2 C
14 Vdc 28 Vdc
1 4 V d c 2 8 V d c
SOOma
S a m e a s T - 1 2 C
S a m e a s T - 1 2 C
S a m e a s T - 1 2 C
S a m e a s T - 1 2 C
S a m e a s T - 1 2 C
SOOma
400 ma
300 ma
300 ma
300 ma
650 ma
400 ma
300 ma
300 ma
300 ma
1a
2 6 v a c 4 0 0 H z
100 ma
120 ma
170 ma
60 ma
320 ma 160 ma
S a m e a s T - 1 2 C
c
S Y S T E M S P E C I F I C A T I O N S
TABLE 1-2 (Sheet 2of 2)
1-4
I.B. 2012-1
Revised Oct/72
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