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DS90UB960-Q1EVM: Eye diagram

Yogesh Ramasamy
Prodigy 40 points
Part Number: DS90UB960-Q1EVM
Other Parts Discussed in Thread: TSER953

Tool/software:

Hi Team,

we have DS90UB960-Q1EVM. I can able to run the link margin using analog launch pad. Attached test results.

Test case:
Deser: TDES960RTDT
Ser: TSER953
Cable length: 5meter

Result:

My query is

1.How to convert this report to eye diagram?

2.Can I run eye test?

3.What are all the test cases we can run to validate the PCB routing and cables with the help of EVM kit and the GUI?

4.How to validate and categorize pass and fail status of the test results?

kindly help us and share your inputs.

  • 0
    TI__Mastermind 26680 points

    Hello,

    It is not recommended to evaluate an FPD-Link system with eye diagrams. It is instead recommended to use the MAP tool. The MAP tool does not produce an eye diagram and is different from an eye diagram test. The MAP tool provides a quantitative method to evaluate the link performance of the system's forward channel. A MAP test is considered passing if there are three EQ levels with at least 4 passing SP positions, with a contiguous 2x4 rectangle being formed by two of the passing EQ levels. The MAP results shared above is passing.

    The MAP tool is the recommended method to evaluate the device connection. The devices also have a built in self test (BIST) mode, which operates the system at speed to send a pseudo-random sequence of data to the deserializer. More information on BIST can be found in the device data sheets. While operating in this mode the devices will log the occurrence of any errors that occurred on the link. Diagnostic registers can also be read during regular operation to verify that the system is running without errors.