Gaia
GAIA.ASU.SP.ESM.00007
Issue 2.00
Page 22 of 79
Astrium Ltd owns the copyright of this document which is supplied in confidence and which shall not be used for any purpose other than that for which it is supplied and shall not in
whole or in part be reproduced, copied, or communicated to any person without written permission from the owner.
GAIA.ASU.SP.ESM.00007 (Avionics SCOE Req Iss 2).doc
AVI-702/CREATED/T
The Avionics SCOE shall provide simulation of data for each RT on the 1553 BUS to simulate missing
Spacecraft units.
AVI-3293/GSE-SYS-749, GSE-SYS-752, GSE-SYS-759, GSE-SYS-763, GSE-SYS-764, GSE-SYS-765/T
For each RT on the 1553 BUS, Prime and Redundant BUS operation shall be possible in parallel.
AVI-1899/CREATED/T
In open-loop test modes, simulation of the each RT shall be as fixed responders only.
AVI-4105/CREATED/T
In open-loop test modes, RT response data for BUS commands shall be defined by input file, direct
user input at the local MMI or by definition from the CCS (Test Procedure/Command Line).
The input file for default 1553 BUS responses will be supplied by Astrium Ltd., in a human-readable file
format (such as XML) as agreed between Astrium Ltd and the Avionics SCOE subcontractor.
The input file will identify, as a minimum, the response data by:
• BUS (A/B)
• Remote Terminal (RT)
• Subaddress (SA)
• Symbolic Name
• Data Size (Word Count)
• Default Value
AVI-4077/CREATED/T
In open-loop test modes, the user shall be able to update the 1553 data response values from the
local MMI or CCS (Test Procedure) by specifying:
• RT and SA, or
• Symbolic Name
AVI-704/CREATED/T
In closed-loop test mode, the RTS shall receive BUS data and respond on the 1553 BUS.
AVI-3157/CREATED/T
In closed-loop test mode, local decommutation of BUS data shall be possible in parallel to RTS
operation.
AVI-2854/CREATED/T
For each 1553 BUS, the Avionics SCOE shall implement a 1553 BUS SPY function, configurable by
RT, which shall capture all traffic of the BUS and store in local files.
Where appropriate, the 1553 BUS SPY function may be achieved using COTS software provided with the
1553 cards.
AVI-2856/CREATED/T
A BUS ANALYSER tool shall be provided to allow the operator to view and analyse the BUS traffic in
real time.
AVI-2857/CREATED/T
The BUS ANALYSER tool shall also allow analysis of BUS traffic previously stored in local files.
Where appropriate, the BUS ANALYSER function may be achieved using COTS software provided with the
1553 cards.
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