Home Forums SYSTEM Improper Argument Error on BER analyzer

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    • #25387
      Shahbaz Qureshi
      Participant

      I was simulating a system and when in upstream direction, I connect DEMUX with circulator directly and after opening BER analyzer it gives an error saying, improper argument. When I attach an amplifier or something in the upstream direction just before DEMUX it shows eye diagram. Pls help. I am attaching simulation file here.

    • #25397
      alistu
      Participant

      Hi Shahbaz,

      It pretty much looks like a bug. You had formerly mentioned about optical amplifier being used and the problem being solved. Now I used an optical amplifier with no gain and the problem with BER analyzers was solved. Perhaps Damian will clarify this further on Monday.

      Regards

    • #25401
      Shahbaz Qureshi
      Participant

      I understand. I did not want to use amplifier in upstream direction. Since, it was not giving result without it. I had to place DFA black box with gain control.. If I set gain value to 0 will it effect the result or it will act as there is no amplifier attached?

      • #25404
        alistu
        Participant

        If you change the gain to zero, still some noise will be added to your signal. I used an optical amplifier and put the values for gain and noise figure zero, and I encountered the problem again. However, if you think the amount of noise added by amplifier does not change your results that much, you may use it, although the main problem remains unsolved.

    • #25408
      Shahbaz Qureshi
      Participant

      I tried simulating the system with gain 0 in upstream direction. It worked with a little bit of noise. However, you are right the bug stays there.

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