ALL
EFFECTIVITY
© Honeywell International Inc. Do not copy without express permission of Honeywell.
Page 2-20
22 Apr 2019
23-15-49
SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUAL
ASPIRE-400
(1)
There are 2 anticipated mutually exclusive application configurations: Standalone and
Dual Safety SATCOM.
(a)
Standalone: only one SDU.
(b)
Dual Safety SATCOM: 2 SDUs interconnected, but only one can be active and
logged onto safety services at any one time.
(2)
If the SDU Dual System Disable (DSD) discrete is asserted, the SDU:
(a)
Silently Logs off if already logged on.
(b)
Disables its RF transmission.
(c)
De-asserts its Dual System Select (DSS).
NOTE:
This applies for all configurations.
B.
Standalone Configuration
(1)
In Standalone Configuration, the SDU is always the active SDU, no other SDU is
considered.
DRAFT
3rd rvw Draft as of:
29 January, 2020
Summary of Contents for 90402651-000
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