Honeywell BendixKing KT 76C, Installation Manual

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B
ATCRBS TRANSPONDER KT 76C
Rev 3, May 2004 IM 006-10545-0003.dwd Page 1-3
Sensitivity and Dynamic Range: The minimum triggering level (MTL) is defined as the
minimum input power level that results in a 90% reply
ratio if the interrogation has nominal pulse
characteristics.
A. The MTL for ATCRBS will be -73 dBm
+/-
4 dB.
B. The reply ratio will be at least 90% for ATCRBS
interrogations between MTL and 50 dB above MTL.
C. The variation of MTL between ATCRBS Mode A
and Mode C interrogations will not exceed 1 dB.
Transmitter Characteristics:
Reply Transmission Frequency: The transmitter frequency of the reply will be 1090
+/-
3MHz when observed in a 50
Ω
load with a VSWR of
1.2:1 or less.
RF Peak Power Output: The transmitter output power will be 125 watts peak
power minimum and 500 watts peak power maximum
at the terminals of the transponder antenna. The pulse
amplitude variation between any two pulses in an
ATCRBS reply will not exceed 1 dB.
ATCRBS Reply Rate Capability: The transponder will be able to continuously generate
at least 500 ATCRBS 15-pulse replies per second and
will have the capability of a peak reply rate of 1,200
ATCRBS 15-pulse replies.
NOTE: A 15-pulse reply includes 2 framing pulses, the
12 information pulses, and the SPI pulse.
Reply Pulse Characteristics:
ATCRBS Reply Pulse Positions The reply function will consist of two framing pulses
and 13 information pulses. The pulse spacing
tolerance for each pulse (including the last framing
pulse) with respect to the first framing pulse of the
reply group will be +/-
0.10
µ
sec. The pulse spacing
tolerance of any pulse in the reply group with respect
to any other pulse (except the first framing pulse) will
be no more than +/-
0.15
µ
sec.
Table 1-1 KT 76C Technical Characteristics