Part Number: DP83867ERGZ-R-EVM
Other Parts Discussed in Thread: DP83867E, USB-2-MDIO,
Hi,
Good day!
We are using DP83867E evaluation board. Right now, I am using this to verify all of the tests for 1000Base-T using USB-2-MDIO tool as we are going to test our custom board with several DP83867E phys. However, when I performed the peak output voltage with disturber on the evaluation board, I will get a failing voltage point A B difference. Please see the below picture.
If I use the formula as shown on this link:https://www.ti.com/lit/an/snla385/snla385.pdf?ts=1664799502690&ref_url=https%253A%252F%252Fwww.google.com%252F
I will get a negative value but a passing one.
I will have a passing test without the disturber. I am using Rohde & Schwarz RTO 1044 oscilloscope with a test suite from R&S.
Is this something related to the calculation used in R&S software?
The voltage point B is also lower compared to voltage point A. Is this really the behavior of the PHY?
Thank you in advance.
