Horizontal line in Eye Diagram

[muhammad jawad]

Dear Friends
Hope you all will be fine
Please check the attached figure of eye diagram and let me know why i am getting a horizontal line/trace in my eye diagram and how to remove that line?
Requested all of you to comment and help out me
regards

Attachments:

1. 

   5b.jpg
   

[Mohamed A. A. Abouseif]

Usually there is no line in the middle like this but might be your system close it with this line!!
improve the system by for example remove the fiber make it back2back and check the eye diagram again !!

Mohamed Abouseif

[muhammad saqlain]

ok.Match your input mapped data (baseband signal)and output signal (in case after LPF) using dual port oscilloscope.If there is any delay or DC shift in output baseband signal,try to remove it and hopefully this middle line would be removed.

[muhammad jawad]

Dear Mohammed AAA and Muhammad Saqlain

Thanks for your reply and interest

Actually the issue( horizontal line in eye) was resolved by changing the TIME WINDOW value of eye analyzer from 1.5(Default) to 1 or 2 or 3.For you information please
regards

[Author]

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