We use B4860 QorIQ for our project and we want to check the B4860 serdes for CPRI application .
for the setup and integration we use hardware - B4860 QDS
and setting using QorIQ serdes validation tool .
For the Serdes validation we set the configure as:
RCW = CPRI , link rate 4.915Gbps
we set 2 tests:
Test 1 - BIST -> test Pattern = PRBS7 digital loopback and long test.... , result = PASS (no errors, CDR lock, BIST pattern Sync),
Test 2 - Eye diagram - the Eye diagram is very bad and noisy, see attach pic.
it seems very strange , the BIST pass but eye diagram very bad, can you please advise?