TUSB212: TUSB212 eye diagram pressed to the left template line

Peggie

Part Number: TUSB212

Dear Team,

1.When using the TUSB212 redriver to test the eye diagram, the EQ is adjusted to 0R resistance to ground. JK 7mv.The left side of the eye is pressed to the warning line, and the right side is passed. Adjust DC_BST from 22 to 47K, but nothing changes.How to adjust if the slope can be adjusted.

2.My schematic

3.My eye diagram

thanks very much！

over 6 years ago

0 Malik Barton57 over 6 years ago

TI__Guru 64326 points

Hi,

Can you describe your test condition? You may consider increasing the EQ settings for this test. Have you tried EQ level 1 or 2?

In general, any form of DC Boost will only affect the DC high and low levels. Changing DC Boost will not affect the leading edge (left) and trailing edge (right). Changing your AC Boost or equalization (EQ) settings will help effect these edges.

0 Peggie over 6 years ago in reply to Malik Barton57

Intellectual 445 points

WT_0513_Debug.xlsx

0 Peggie over 6 years ago in reply to Peggie

Intellectual 445 points

This is my test file

0 Peggie over 6 years ago in reply to Malik Barton57

Intellectual 445 points

Just like in my test file. I tried to change AC Boost and EQ, but it didn't change much. Is there any other way to change the slope? Thanks very much！

0 Malik Barton57 over 6 years ago in reply to Peggie

TI__Guru 64326 points

Hi,

Sorry for the late response. Could you describe your test setup in more detail including where you are measuring the Eye Diagram?

0 Brian Zhou over 6 years ago in reply to Malik Barton57

TI__Guru*** 144205 points

hi:
can you provide more information?

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TUSB212: TUSB212 eye diagram pressed to the left template line