HELLO RANJEET
Well now what i understand from the comparison is that in my opinion , in 3R regenerator scenario the signal quality is improved because as the name suggests ‘regenerate’ . I believe it is the improvement of signal in 3R regenerator that the quality factor is so high compared to case when you directly connect the signal to the BER analyzer. But i still believe this much variation should not have been there. It quite strange.
Anyway thanks for conveying it.
Regards