EFFECTIVITY
CONFIG 3 IB ALL 714 Page 2
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T35255
P7 ELECTRONIC CIRCUIT
STDBY BUS FOR IB 406 AND ON
ATC 2
BREAKER PANEL

2 ATC 2 AC, 115V AC, TRANSPONDER FOR IB 406 AND ON
ATC System Interface
Figure 2

EFFECTIVITY CONFIG 3IB ALL

714 Page 3
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 C.  On IB 406 and on, the controls and indicators mounted on the front panel of the transponder are a test switch and reply light.
 4.  Antenna
_______
 A.  The two ATC antennas are conventional blade-type units connected to the transponders by coaxial cable. Each antenna performs the transmitting and receiving functions for its respective transponder.
 EFFECTIVITY

 IB ALL  CONFIG 3  01 Page 4  Jan 25/8034-53-00
ATC ANTENNA

T35256
ATC CONTROL MODULE
ATC System Block Diagram

Figure 3 (Sheet 1)
EFFECTIVITY
CONFIG 3IB 401, 402, AND 405
799 Page 5
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B102 ATC 2 ANT B100 ATC 2 TRANSPONDER (E3-6) (STA 570, WL 91,
ATC System Block Diagram
BL 0)
Figure 3 (Sheet 2)
EFFECTIVITY

 CONFIG 3 IB 406 AND ON799 Page 6
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DB99C  DB163C 
OUTPUT REPLY CODE  31  5  A1 
32  6  A2 
33  7  A4 
34  8  B1 
35  ALT  1  B2 
36  REPORTING  2  B4 
CODE 
37  3  C1 
38  4  C2 
39  9  C4 
40  11  D2 
41  12  D4 
13  COMMON 
DECODER/ENCODER  B163 CADS 1 
CMPTR (E1-4)
9 10            42  7 6  18 19 20  21 22 23  24 25 26  27 28 29
IDENT 
ENABLE  DB81B 
J_ DB37  1 SUPPRESSION 
IDENT  THOUSANDS DB37 B 
X 
C 
Y 
DB37  D Z 
R_  1  B81 DME 1 
INTRG (E3-6)
ALT RPTG  HUNDREDS  E 
DC  A_ 
F  DB82B 
_N  B_ 
G  1 SUPPRESSION 
C  OFF  C_ 
AC 
B  TENS  J D_ 
PNL/DIAL  K E_ 
LIGHTS  L 
F_  B82 DME 2 
STBY  A  B  INTRG (E3-6)
_Q 
UNITS N 
_G 
TEST  O 
_H 
P 
_I 
S 
_M  FAULT  1  2  DB164C 
_K  REPLY  ATC  N  13 
T 
R 
B37 ATC CONT PNL (P8)  DB37 
9 10 742  6  18 19 20  21 22 23  24 25 26  27 28  DB100B 129  AS SAME 
DB100C  B163 
41  12 
40  11 
39  9 
38  4 
37  3 
36  2 
34 35  1  8 
33  7
32  6
31  5 

B164 CADS 2 CMPTR (E1-5)
ATC System Block Diagram Figure 3 (Sheet 3)
EFFECTIVITY

 CONFIG 3 IB 406 AND ON799 Page 7
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ATC NO. 2 TRANSPONDER
Altitude Data Switching Simplified Schematic
Figure 4

EFFECTIVITY

CONFIG 3
IB ALL
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 5.  Operation (Fig. 3)_________
 A. Functional Description
 On IB 401, 402 and 405,
 XA  (1) The 1030 MHZ coded interrogation signal received by the antenna is
 XA  applied through the diplexer to the preselector which contains
 XA  the resonant cavities. The output of preselector is coupled to
 XA  the mixer where the signal is heterodyned with the crystal
 XA  controlled local oscillator output to produce the 60 MHZ IF signal.
 XA  (2) After amplification by six stages, the IF signal is video detected,
 XA  amplified and coupled to the video processor.
 XA  (3) The video processor analyzes the interrogation pulses for pulse
 XA  width and relative pulse amplitude. Interrogation pulses when
 XA  valid are applied to the decoder. Side lobe suppression pulse, if
 XA  received is applied to the S.L.C. decoder. The video processor
　
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