INSTALLATION MANUAL
89000007
Page 1-2
15 Nov 2013
© Honeywell International Inc. Do not copy without express permission of Honeywell.
Table 1-1. Interface Services (Cont)
Interface
Description of Service
Serial altitude output Connection to a GPS or other device needing serial altitude
data – this allows the transponder to act as a repeater
instead of requiring a second altitude encoder.
Ident input
External IDENT switch input.
Standby input
External standby input for dual transponder installations.
“On ground” input
Allows automatic flight/ground mode switching for aircraft
with a squat switch.
Lighting bus input
Used to adjust the backlight and switch lighting intensity.
DME Suppression
Input
Input to limit interference between DME interrogations and
transponder replies – suppresses transponder when active.
Suppression bus I/O ARINC compatible suppression bus signal used in aircraft
with more sophisticated suppression needs, both an input to
and output from the transponder.
Audio output
Optionally used by the altitude monitor function.
Audio mute input
Toggle function to mute the audio output.
Altitude alert output
Output used to signal altitude deviations when altitude
monitor function is used.
GPS Input
Connection to a GPS supplying position input for ADS-B
position reporting.
Serial TIS-A Output
RS232 output for connection to traffic display.
ARINC TIS-A Output ARINC429 output for connection to traffic display.
1.3 Regulatory
Refer to Table 1-2 for regulatory data for the KT 74 Mode S Transponder.
Table 1-2. Regulatory Data
Specification
Characteristics
Compliance
ETSO C112d, TSO C112d; Class 1 Level 2es
ETSO C166b, TSO C166b; Class B1S
FCC identification
VZI01157
Applicable documents
EUROCAE ED-73E, EUROCAE ED-14G (RTCA DO-
160G), RTCA DO-181E, RTCA DO-260B Corrigenda 1
Software
ED-12B (RTCA DO-178B) Level B
PLD
DO-254B Class C
