Home Forums SYSTEM Problem with Modulator’s setting

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    • #66928
      Subhash Arya
      Participant

      Dear All,
      I am trying to replace the exiting LiNbO3 (dual drive) based modulator with my own designed Modulator, but I am unable to get the expected constellation diagram (attached here). What may the the issue. I have taken 56 Gbps coherent 16 QAM back to back with DSP example given is sample for simulation.
      Thanking you.

    • #66942
      Ahmad Atieh
      Moderator

      Hello Subhash,
      Could email me your project as a zip file to ahmad.atieh@optiwave.com to debug it? It is difficult to debug the issue.
      From the constellation graph, the modulation is not 16QAM. I see only 8-spots, which may indicate 8QAM placed circular.

      Regards,
      Ahmad

    • #66947
      Subhash Arya
      Participant

      Dear Sir,
      Thank you for respond. I have sent both files, i.e. original one as well as modified one on your email. Please look into the problem and suggest to overcome the problem.
      With regards,
      (Subhash Arya)

    • #66951
      Ahmad Atieh
      Moderator

      Hello Subhash,
      Unfortunately, I didn’t receive the files. You need to send them as zip files.
      Regards,
      Ahmad

    • #66954
      Subhash Arya
      Participant

      Dear Sir,
      I have sent now file as zip file. Hope this time you shall receive.
      With regards,
      (Subhash Arya)

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