Honeywell International Inc. KTR2280A Manuale Utente
SYSTEM INSTALLATION MANUAL
KTR 2280A
Page A-8
15 May 2017
© Honeywell International Inc. Do not copy without express permission of Honeywell.
KA 44B ENVIRONMENTAL PERFORMANCE
The KA 44B ADF Antenna (Honeywell PN 071-1234-00) is certified to TSO C41c with RTCA DO-160A
environmentals per B2D2/A/LJY/XXXXXX/ABABA.
Recent "not-for-certification-credit" testing has been performed on this antenna to determine expected
performance in selected DO-160D environmental conditions.
DO-160D Section 20 (RF Susceptibility) Tests
A KA 44B production test sample was subjected to Category TT fields as defined in the test environment called
out in RTCA DO-160D Section 20 (Change No. 1). This unit was tested in conjunction with the KTR
2280 Multi-Mode Digital Radio. All conducted and radiated susceptibility performance requirements
were passed except for radiated susceptibility in the band of interference frequencies between 277 MHz
and 339 MHz. Within this band the KA 44B could not tolerate interference levels greater than 0.8 V/m
(for acceptable audio signal-to-noise) or greater than 1.1 V/m (for acceptable bearing error).
A KA 44B production test sample was subjected to the 100 V/M (and greater) HIRF levels expected for aircraft
system level certification. This test was done in a manner consistent with aircraft system level HIRF
certification testing. No permanent damage was noted during the HIRF exposure and the unit returned
immediately to normal operation after the HIRF event terminated.
DO-160D Section 22 (Lightning Induced Transient Susceptibility) Tests
A KA 44B production test sample was subjected to Category A3J33 as defined and in the test environment
called out in RTCA DO-160D Section 22 (Change No. 3). The KA 44B passed all requirements.
DO-160D Section 23 (Lightning Direct Effects) Tests
A KA 44B production test sample was subjected to Category 2A as defined in the test environment called out in
RTCA DO-160D Section 23. The KA 44B passed all requirements.
Other DO-160D based test data has been collected and is available on request from Honeywell.