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High bit-rate jitter

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(joined August 2014)
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Dear optiwave team, what is the best (more precise) way to measure jitter (phase shift) for high bit-rate TDM?

Responses (6):

    • #14010
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      Ravil
      Participant

      Dear optiwave team, what is the best (more precise) way to measure jitter (phase shift) for high bit-rate TDM?

    • #14024
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      Damian Marek
      Participant

      If you are modulation scheme is NRZ/RZ on/off keying then you should try the BER Analyzer. It will calculate the Peak-to-peak jitter and RMS jitter value in the results section. Look at the component help for more info.

      +1
    • #14026
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      Ravil
      Participant

      Thanks for your quick reply, Damain! Usually, more advanced modulation schemes are being used for high bit-rate, e.g. DP, QPSK, etc. Will BER Analyzer be useful for them?

      • #14029
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        Damian Marek
        Participant

        You could observe it graphically like in:

        Signal degradation – Jitter

        In QAM there would be multiple levels, but it should be possible to just choose one crossing or take an average of multiple crossings.

    • #14027
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      Ravil
      Participant

      Is it possible to useful Clock Recovery component to measure the phase shift and then estimate the jitter? Or Time domain visualizer will be more accurate?

      • #14030
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        Damian Marek
        Participant

        I’m not sure how you would calculate the jitter from the phase shift. From my understanding the best way is to look at the eye diagram of a transmitted sequence.

    • #14052
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      Ravil
      Participant

      OK, thank you for advice!

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