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
34-53-00
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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
714 Page 8
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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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