29. March 2020 05:35 by Christian
in EMC/EMI, Load Simulator
A successful electronic module validation testing depends on:
- DUT Design Performance (60%).
- Load Simulator & Support Equipment EMC compliance (20%).
- EMC Test Plan (20%).
The Load Simulator must be CISPR-25, ISO 11452-2, and ISO 11452-4 compliant.
EMC Test Plan:
- Select representative samples covering multiple vehicle platforms having design differences.
- Select all applicable test methods except those that:
- are not required for certain module category as outlined by OEM spec selection matrix.
- are in conflict with design requirements imposed by Component Technical Specification (CTS).
- Define for each DUT Type/Model:
- Known sources of RF noise.
- Functions Performance Classification.
- Operating Modes per Test Method:
- DUT Configuration:
- Block Diagram including grounding scheme.
- Connectors Pinout.
- Test Harness Type & Mate Connectors:
- standard 1.7 to maximum 2 m.
- customized (inserted banana jacks & plugs @ 20cm from DUT connectors).
- ESD mate connectors with 2.5 solid core wire.
- Activation Method:
- Load Simulator HW/SW Configuration - Operating Manual.
- Other DUT Support Equipment (e.g pneumatic activation).
- Other DUT Support Software.
- Monitoring Method:
- DUT Test Points.
- Load Simulator Test Points.
- LS Configuration (e.g. switches, I/O lines). More details in LS Operating Manual.
- How to evaluate a HW/SW Reset condition.
- How to evaluate successful Self-Recovery.
- Measurable Parameters & Tolerances:
- Support Equipment:
- Resolution (e.g. use oscilloscope vs DMM during voltage transients/dips/drops).
- Fiber Optic (CAN, USB, E-Net, LVDS, etc). Must be 200 V/m compliant.
- Support Software:
- Configuration, data files format.
- Differences between DUT Reset and Support Equipment Reset.
- Pass/Fail Criteria per Test Point and DUT Function.
- Reporting Data type and format (e.g. tables, plots, pics).
- Negotiate EMC compliance deviations based on known DUT design limitations driven by cost/delivery.