Importance

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Abstract

A method for correlating and displaying physical layer and application layer timing information includes detecting an edge transition of a physical layer waveform from a physical clock on a DUT and generating a timestamp for the detected edge transition. A physical clock timing error is determined based on the timestamp for the detected edge transition. Timing protocol messages are exchanged between the test system and the DUT. The test system generates timestamps when transmitting or receiving the timing protocol messages and receives timestamp information from the DUT and a protocol time is determined. The physical clock timing error and the protocol time are correlated and relative times of the physical clock timing error and the protocol time are determined. The method further includes displaying, by a graphical user interface on the test system, a graphical representation of the relative times of the physical clock timing error and the protocol time.

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First Claim