ESA title
Enabling & Support

MIL-STD-1553 Testbench

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ESA / Enabling & Support / Space Engineering & Technology / Onboard Computer and Data Handling

The Mil-1553 test-bed

The Mil-1553 test-bed in the Avionics Lab provides a facility for prototyping, simulation and verification of on-board bus protocols and services. The complete system includes hardware and software components: various processor boards (PC, ERC32, Leon), I/O boards, harness and software tools. All the layers of the protocols are covered, from the physical layer to the application layer.

Current capabilities:

  • Record the Bus traffic and check for the CS, ME and correctness of CW DW SW response time and inter-message gap.
  • Post analysis of the bus traffic.
  • Complete set of harness which enables to emulate various configuration of the bus network. Possibility of discontinuities injection in the physical data bus.
  • Prototyping at the level of ECSS-50-13C for PC and Leon board.
  • Measure of signal margins (amplitude, rise and fall time, zero crossing etc...)
  • Measure of noise impact, measure of BER
  • Error Injection (Parity, Manchester, Bit and Word Count etc...)
  • Any Instrument or a representative unit like bread board or Engineering Model can swap any simulated RT for testing in representative bus traffic.

Activities performed:

  • Herschel/Planck Transfer Layer Protocol
  • Prototype, simulate and verify the Satellite Data Bus Protocol (SDBP)
  • Perform on-board equipment (units) I/F compatibility verification at SDBP level
  • Check the requirements by detecting possible:
    • Conflict between requirements
    • Wrong and/or ambiguous requirements
    • Missing requirements
  • ECSS-E-50-13 Prototyping
  • VEGA Physical Layer
  • Impact of nominal I/F activity on redundant I/F (noise)
  • ERA project
  • Measure of the signal integrity & electrical characteristics for the MMI EGSE Mil-1553 I/F. Check bus traffic for CS and ME.