The ICEU VME Card Specifications
- Simulates all the digital interfaces of the ICM S-Band Transponder (SBT or Transponder)
- All simulated Transponder interfaces are optp isolated from VME ground
- VMEbus interface for forward link data, 4096 words of buffering
- Automatically inserts 32-bits of minimum idle data between commands
- Programmable idle data, all 1's, all 0's, or alternating 1's and 0's
- VMEbus inferface for correlated return link data, 32 frames of buffering
- Return link data is appended with time tag and CRC is checked
- VMEbus interface for Transponder Mode/Frequency command reception
- VMEbus interface for Transponder Status generation
- Provides interface between JSC test facilities and ISC flight equivalent units
- Provides forward link data to TURFTS (Digital NRZ-M)
- Provides forward link data to TURFTS (Analoge BPSK)
- Receives return link data from TURFTS
- Generates LC EPOCH signals
- Drives forward link data and receives return link data over the umbilical cable during launch support
- Interfaces to the ELSE Bus Protection Unit (ELSE-BPU), during launch support
- Interfaces to the ELSE Ordinance Reset VME Card, during launch support
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