1. Status of the DSP/ASPOC EM
K. Torkar IWF/OAW, Graz, Austria August 2002

2. Photos of DSP/ASPOC EM01

3. Photos of DSP/ASPOC EM01

4. Deltas to FM
Emitter Modules replaced by dummies with four heater elements (FM will have two)
No pyro’s installed
Mass, surface finish
Some electronic components (RAMs, crystal, etc.)
Electronic board layout
IEL connector includes DWP interface (not used)
Embedded software already modified from Cluster to DSP, but minor changes are still to come

5. Modifications of EM for DSP
Embedded software modified
Parameters and commands related to IEL with DWP/EFW deleted
Feedback parameters, backup mode
Parameters and TCs related to emitter control features added
More flexibility for start-up of emitters
Higher time resolution of voltage monitor
Four additional commands for start-up of emitters
Change of internal harness for emitter heaters
Between J06 and motherboard
For compatibility between new software and Dummy Emitter Modules from Cluster

6. Control File Definitions
Control Files sent to IC in version 1.1,
File Name Remark
ASPOC_ON_MAIN Power-on on MAIN channels
ASPOC_OFF_MAIN Power-on on REDUNDANT channels
ASPOC_AFT_MAIN AFT on MAIN channels
ASPOC_AFT_REDUNDANT AFT on REDUNDANT channels
ASPOC_IST_MAIN IST on MAIN channels
ASPOC_IST_REDUNDANT IST on REDUNDANT channels
ASPOC_SFT_MAIN SFT on MAIN channels
ASPOC_SFT_REDUNDANT SFT on REDUNDANT channels
ASPOC_IEL_MAIN IEL test on MAIN channels
ASPOC_IEL_REDUNDANT IEL test on REDUNDANT channels
ASPOC_OFF Power-off (also emergency power-off)

7. Electrical Test Setup Overview

8. Electrical Test Setup
Power
Signal

9. Electrical Test Setup Spacecraft Simulator, EM01, oscilloscopes
EM01, break-out box, oscilloscopes

10. Interface Verification Test Results
The interface verification tests were successful.
The electrical interfaces are compliant with EID-A.
HK Data
Inrush Current

11. Bench Test
Verified telemetry, telecommand, housekeeping functions, and emitter filament supplies
The bench test was successful.

12. Conclusion
The DSP/ASPOC EM01 is ready for pre-integration