Users Manual

ALL
EFFECTIVITY
© Honeywell International Inc. Do not copy without express permission of Honeywell.
Page 6-14
22 Apr 2019
23-15-49
SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUAL
ASPIRE-400
(e) Performs a SATCOM test.
NOTE: Commanded self-test always retains communications with the CFDS
and never results in the SDU being rebooted.
(6) The ACD management of the external SATCOM LRUs providing antenna or amplifier
functions includes a commanded self-test.
C. PIMBIT
(1) PIMBIT provides the capability to measure intermodulation products falling in the receive
band. It is only applicable to configurations supporting dual channel operation.
(2) Upon entry into PIMBIT the SDU automatically on each active channel:
(a) Terminates all data contexts.
(b) Terminates all circuit switch voice connections.
(c) Commands CC into Inert Power On Mode.
(d) Prevents activation of data contexts.
(e) Prevents activation of voice connections.
NOTE: This cleanly disconnects the channel from the ground network and
then prevents it from transmitting and receiving protocol data over the
air. This is safe for intrusive Maintenance Mode activities.
(3) The ACD only allows initiation of the PIMBIT test when the following conditions are met:
(a) The aircraft is on the ground;
(b) The aircraft is disconnected from any satellite;
(c) The SDU is running in maintenance mode;
(d) The SDU is configured with two SBB channels;
(e) The valid transmit and received frequencies were obtained via the
SwiftBroadband bulletin board broadcasts in the last 168 hours;
(f) The SDU is receiving Valid navigation data;
(g) The OCXO is ready; and
(h) No hardware failures exist in the system that affect the PIMBIT result.
(4) When the ORT indicates the presence of an HGA, the ACD PIMBITsets 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
2 For an antenna gain less than 12 dBic the power at the output of the
power amplifier is 8 dBW plus the ORT PA to antenna loss value.
(5) When the ORT indicates the presence of an IGA, the ACD PIMBITsets the level of the
power amplifier so that:
(a) For an antenna gain of 6dBic or more:
1 The power at the output of the antenna is 15.1 dBW EIRP per carrier.
DRAFT
3rd rvw Draft as of:
29 January, 2020