Home Forums SYSTEM Eye Diagram Analyzer

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    • #43356
      NURUL HAMIDA
      Participant

      Hi, all…
      Have a good day everyone.

      I have designed the RoF system for remote upconversion.I want to upconvert the frequency up to 15.9GHz.From the RF spectrum analyser, I got the result. But, the eye diagram was so worst.

      Can anyone help me to trace that problem. I just optimise the laser power and the result still same. Down here is my result from Eye Diagram Analyzer

    • #43360
      Mengchao Ma
      Participant

      hi,NURUL HAMIDA
      wow, are there many eyes on your jpg?
      honesetly,ROF is not familiar with me.
      as per the forming of ‘eye’,i think the result is caused by the transmit bit sequence which is not binary.

    • #43370
      NURUL HAMIDA
      Participant

      I think also,,,,
      When I modulate the NRZ bit sequence with a laser source, the eye diagram was clear. But, when I modulates the RF signal with laser source, the eye diagram was so worst

    • #43373
      muhammad jawad
      Participant

      Dear Noor ul Huda

      to make your eye diagram more open and clear

      change filter type and order i.e use RC LPF
      decrease the sequence length upto 32
      you may use 3R to improve Q factor
      if work then plz let me know

    • #43374
      muhammad jawad
      Participant

      i am also working on ROF and UWBoF.so our research fields match
      have in contact regards

    • #43409
      NURUL HAMIDA
      Participant

      Hi muhammad jawad,,,

      Actually, i’m not sure how to choose filter type and sequence length. For filter type, what is the parameter that we have to consider to choose that filter. For sequence length, the long sequence length or short is better for a system to operate well

    • #43488
      K. Esakki Muthu
      Participant

      Global bitrate should be same as the PRBS bitrate. Just Check it.

    • #43493
      NURUL HAMIDA
      Participant

      Hi K. Esakki Muthu.
      I have checked the bit rate. The PRBS bit rate was same with global bit rate. The result that I got as attached down here.

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