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DP83822I: TX/RX Test for Non-standard Connetor

Hao Wang14
Expert 4415 points
Part Number: DP83822I

Hi Team,

My customer is using DP83822 with non-standard connector rather than RJ-45, they are worried about the signal integrity issue. Could you please give us some suggestions or guidance on the following questions? Thank you!

1. What's the standard test process for Ethernet PHY? Is there any official document about the test regulation?

2. For the non-standard connectors, where and which pins should be tested? Do we need any specific equipment?

3. Can the differential probes be used to test the output signals and input signals? If so, how to make sure if the signal is good or not?

The female and the male connectors used by the customer are shown in the picture below:

 

Best Regards,

Hao

  • 0
    TI__Mastermind 19780 points
    Hi Hao,

    I think your questions are answered with the DP83822 compliance testing app note: www.ti.com/.../snla266

    Compliance testing is performed to ensure your Ethernet port is compliant with the spec and should be performed for each design, especially with non-standard connectors.

    If your non-standard connector passes the compliance tests, then the design would be OK.

    Best Regards,
  • 0 in reply to Rob Rodrigues
    TI__Expert 4415 points
    Hi Rob,

    Thanks for pointing out the testing app, it's quite useful to test the transmitter signal, is there any method to test the signal of the receiver?
    That is to say, if the non-standard connector is used, how can we make sure if the signal received at the other end meets the compliance?

    Thanks,
    Hao
  • 0 in reply to Hao Wang14
    TI__Mastermind 19780 points

    Hao,

    When you test a board design for compliance, your non-standard connector is in the signal path.  The below diagram shows the setup for the tests.  The customers PCB will be the DUT in this case.

    The green circle indicates their non-standard connector.  The non-standard connector is inline with the signal.  if the signal integrity of the non-standard connector is bad, the testing will fail.

    Best Regards,