TLK10232EVM: TLK10232 IBERT Test Failure – No Sync Between EVM and System

Part Number: TLK10232EVM
Other Parts Discussed in Thread: TLK10232, TEST2

RE_ TI Support for HP Israel.msg 

We are seeking your support with an unresolved issue using the TLK10232.
Summary:
  • Setup: TLK10232 EVM connected to our FPGA-based tester board via optical link
  • Test1 (EVM loopback) – PASS
  • Test2 (EVM + system traffic) – PASS
  • Test3 (IBERT / PRBS on both sides) – FAIL (no synchronization)
Details:
  • PRBS31 generated and verified on both sides
  • AN and LT disabled
  • SYNC_STATUS_CHECK_DISABLE set
  • Multiple TX/RX equalization settings tested (no impact)
  • Configuration script attached (same used for working tests)
Observation:
When connecting the EVM to our system for IBERT, there is no sync/lock indication, although both sides work independently.
We would appreciate your guidance on:
  1. Required configuration for IBERT interoperability between EVM and external FPGA
  2. Any known limitations or required alignment (clocking, polarity, training, etc.)
  3. Review of our configuration for potential mismatches
This issue is currently blocking our progress.
See attached correspondace.