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Duobinary Modulation

(joined April 2020)
Participant

Hello Everyone,

I am using a duobinary pulse generator to calculate the BER and Q factor but not getting any result using BER analyzer.

Please help me.

file attached

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Responses (5):

    • #67691
      Gaurav Sharma
      Participant

      Hello Everyone,

      I am using a duobinary pulse generator to calculate the BER and Q factor but not getting any result using BER analyzer.

      Please help me.

      file attached

      Attachments:
    • #67709
      Profile Photo
      Ahmad Atieh
      Moderator

      Hello Gaurav,

      Please refer to the example (Duobinary Signal.osd) in OptiSystem example Library located at the following link for guidance and more information.
      C:\Users\USER NAME\Documents\OptiSystem 17.0 Samples\Optical transmitter design and analysis

      Regards,
      Ahmad

    • #67749
      Gaurav Sharma
      Participant

      Dear Sir,

      01 more query that every time when I evaluating my project, I am getting different readings of Q factor, MBER, eye height and threshold. is there any way to stabilize the reading for a particular design.

    • #67757
      Profile Photo
      Ahmad Atieh
      Moderator

      Hello,
      The reason for the different results every time is related to the random signals and noises generated in the system. You may disable them, then you’ll get the same result every time.
      Regards,
      Ahmad

    • #67776
      Gaurav Sharma
      Participant

      Sir,
      from where I have to disable the random signals and noise in the system. Please guide me along with the steps.

      Regards

    • #67789
      Profile Photo
      Ahmad Atieh
      Moderator

      Hello,
      you need to check each tab in the component properties popup window if it has noise tab. If it does, you may disable it.
      Regards,
      Ahmad

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