DP83867CR: 1000Base-T compliance test failed

Hi Takahashi-san,

Please share the compliance report and checklists with me over email, I will review:

e-mayhew@ti.com

Thank you,
Evan

Hi Evan-san,

I sent you e-mail.

Thank you,

Hi Takahashi-san, 

We received the email and will get back to you with the feedback at the latest by Friday. 

Best,
J

Hi J-san,

Thank you for your reply.

I look forward to hearing from you.

Hi Takahashi-san, 

Could you try using this setting to run the 1000Base-T Compliance Test?


We are currently working to update the compliance test script and adding these two lines made customers easier to pass the compliance test. 

In addition, I noticed that the Peak Volt Point A and Point B fell below the lower margin when the gain +14% but it was over the higher margin for gain +10%. Could you ask the customer to verify if they meant -14% or +14%. 

Also, based on the review of the system, I think lowering the gain even more than -8% may help pass the compliance test. Could you try to go lower? 
The customer can change this setting on register 0x00A0 and 0x00A1 bit [3:0]. The lowest the customer can go is -16%. 

The schematic and the layout looked good but I would suggest to connect the DGND and Earth GND with 1M ohm resistor and 4700pF to drop it into the digital ground to close the path. In addition, I do recommend to have RESET_N signal connected to 100 ohm resistor and 47uF capacitor in series to DGND. 

Please let me know how this goes. 

Best,
J

Hi J-san,

Thank you for your reply.

I provided feedback to the customer and will contact you if there are any updates

Hi Takahashi-san,

Please let me know of any updates.

Best,

J

Hi J-san,

The customer passed compliance testing by adding the following two lines you suggested.

What does this tuning mean?