Eye Diagram Analyzer

[NURUL HAMIDA]

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

Attachments:

1. 

   Eye-Diagram.jpg
   

[Mengchao Ma]

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.

[NURUL HAMIDA]

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

[muhammad jawad]

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

[muhammad jawad]

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

[NURUL HAMIDA]

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

[K. Esakki Muthu]

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

[NURUL HAMIDA]

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.

Attachments:

1. 

   Eye-Diagram-Analyser-2.0.jpg
   

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