B ATCRBS TRANSPONDER KT 76C
Rev 3, May 2004 IM 006-10545-0003.dwd Page 1-5
Side Lobe Suppression Characteristics:
SLS Decoding and Dynamic Range: A. When the RF input signal is varied from MTL +3 dB
to 50 dB above MTL and the level of P2 equals or
exceeds the level of P1 spaced 2.0 +/- 0.15 µsec from
P1 the transponder will reply to no more than 1% of the
interrogations.
B. When the RF input signal is varied from MTL +3 dB
to 50 dB above MTL and the level of P1 exceeds the
level of P2 by 9 dB or more, or P2 =P1 and is spaced
1.3 µsec or 2.7 µsec from P1, the transponder will
reply to at least 90% of the interrogations.
Pulse Decoder Characteristics: Unless otherwise specified, the following pulse
decoder characteristics will apply for an RF input
signal levels of MTL to 50 dB above MTL and nominal
interrogation signal characteristics. Applicable “valid”
interrogations will result in at least 90% replies, and
interrogations which are “invalid” will result in less than
10% replies.
Pulse Position Tolerances: A. The transponder will accept the pulse position of
ATCRBS interrogations as valid if the spacing
between P1 and P3 is within +/- 0.2 µsec of the
nominal spacing.
B. The transponder will not accept the pulse position
of ATCRBS as valid if the spacing between P1 and P3
differs from the nominal spacing by 1.0 µsec or more.
Pulse Duration Tolerances: The transponder will accept the pulses of an ATCRBS
interrogation as valid if the duration of both P1 and P3
is between 0.7 and 0.9 µsec.
NOTE: All measurements are made with a 2 dB cable loss.
Table 1-1 KT 76C Technical Characteristics
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