Why does the E-Tile transceiver PHY IP get zero eye height in some cases?

[BarryT]

We have tested many devices and only a few environments where the Eye Height value is 0 for 2.5G read and the data is normally sent and received. This causes a lot of problems.

So, I would like to ask what causes this phenomenon. Is there any solution?

[ZiYing_Intel]

Hi BarryT,

May I know that your TTK using which Quartus version?

Best regards,

Zi Ying

[BarryT]

Hi Zi Ying,

it's Quartus Prime Version 20.1.0.

But we don't use TTK to get the eye height, we use attribute code to get it.

Best regards,

BarryT

[ZiYing_Intel]

Hi BarryT,

Can you try to use TTK to see eye viewer still got 0 height?

Best regards,

Zi Ying

[ZiYing_Intel]

Hi BarryT,

Is there any update from your side?

Best regards,

Zi Ying

[BarryT]

Hi Zi Ying,

      I do not have the conditions to use TTK to get eye height, maybe I need to think about other ways.

      Thanks for your help.

Best regards,

BarryT