Honeywell BendixKing KT 76C Installation Manual page 10

B
ATCRBS Reply Pulse position from the
first framing pulse are as follows:
ATCRBS SPI Reply Pulse:
ATCRBS Reply Pulse Shape:
ATCRBS Reply Delay and Jitter:
Suppression I/O
Suppression In
Rev 3, May 2004
ATCRBS TRANSPONDER
Table 1-1 KT 76C Technical Characteristics
PULSE POSITION (µsec)
F1 ........... ........... 0.00 (Reference)
C1 ........... ........... 1.45
A1 ........... ........... 2.90
C2 ........... ........... 4.35
A2 ........... ........... 5.8
C4 ........... ........... 7.25
A4 ........... ........... 8.70
B1 ........... ........... 11.60
D1 ........... ........... 13.05
B2 ........... ........... 14.50
D2 ........... ........... 15.95
B4 ........... ........... 17.40
D4 ........... ........... 18.85
F2 ........... ........... 20.30
SPI........... ........... 24.65
Upon activation of the IDENT switch, the SPI pulse will
be transmitted when replying to ATCRBS Mode A
interrogations for a period of 18 +/- 2 seconds. The
pulse spacing tolerance of the SPI pulse with respect
to the last framing pulse will be +/- 0.10 µsec. The SPI
pulse will not be transmitted when replying to Mode C
interrogations.
All reply pulses and SPI pulses will be 0.45 µsec +/-
0.10 µsec duration and have rise times of 0.05 µsec
through 0.1 µsec and decay times of 0.05 µsec
through 0.2 µsec.
A. At all RF input levels from MTL to 50 dB above
MTL, the time delay from the leading edge of P3 to the
leading edge of F1 (the first pulse of the reply) will be
3.0 +/- 0.5 µsec.
B. At all RF levels from MTL + 3 to 50 dB above MTL
the time delay variations between ATCRBS modes will
not exceed 0.2 µsec.
C. At all RF input levels from MTL + 3 dB to 50 dB
above MTL the jitter at the leading edge of the first
pulse of the reply with respect to P3 will not exceed +/
- 0.10 µsec.
This pin is both an input and an output. The
transponder will be suppressed if the input is +18 V dc
to +70 V dc. While the transponder is transmitting it
will drive this pin above 18 V dc. As an output, 18 volts
will be maintained into a load of 300 ohms and 1850
pF.
The transponder will be suppressed if the voltage
applied to this pin is above 6 V dc. This pin follows an
Honeywell
IM 006-10545-0003.dwd
standard.
KT 76C
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