Users Manual

ALL
EFFECTIVITY
© Honeywell International Inc. Do not copy without express permission of Honeywell.
Page 6-17
22 Apr 2019
23-15-49
SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUAL
ASPIRE-400
(8) When the ORT indicates the presence of an HGA, for the generation of two RF carriers,
the SDU RF Carrier test sets the level of the power amplifier so that:
(a) For an antenna gain of 12 dBic or more:
1 The power at the output of the antenna is 20 dBW EIRP per carrier. OR
(b) For an antenna gain less than 12 dBic:
1 The power at the output of the power amplifier is 8 dBW plus the ORT PA
to antenna loss value.
(9) When the ORT indicates the presence of an IGA, for the generation of two RF carriers,
the SDU RF Carrier test sets the level of the power amplifier so that:
(a) For an antenna gain of 6 dBic or more:
1 The power at the output of the antenna is 15.1 dBW EIRP per carrier. OR
2 The power at the output of the power amplifier is 9.1 dBW plus the ORT
PA to antenna loss value.
(b) For an antenna gain less than 6 dBic:
1 The SDU aborts the RF carrier test if either:
a An abort RF Carrier Test command has been received
b The aircraft is no longer on the ground.
G. Historical Log Retrieval
(1) The ACD facilitates retrieval of logs including the conversion to a human readable format.
H. Faults and Events
(1) The Built-In Test (BIT) requirements specified are consistent with the goals of ARINC
604-1. Goals of the design including:
(a) Not to intrude or degrade the primary function of the equipment while either BITE
functional or BITE in failure (fail-safe)
(b) Not increase the power consumption, weight or volume of any element of the
system by more than 5%
(c) Not increase the system failure rate more than 5%
(d) Isolate the fault where possible to the Line Replaceable Unit, when ORTselected
(e) Attempt fault recovery where possible.
(2) Operational Mode BIT comprises of:
(a) Power On Self-Test (POST)
(b) SDU POST - Internal to the SDU
(c) SATCOM POST - Utilizes HPA, D/LNA and HGA
(d) Commanded self-test
(e) invasive tests that are commanded (rather than occurring due to power on)
(f) Continuous BITE (CBITE).
(3) POST determines the health of the SATCOM system hardware when it is first powered
on. It may run intrusive tests to gather this health status. POST operation is described in
DRAFT
3rd rvw Draft as of:
29 January, 2020