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October 27, 2015 at 8:00 pm
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Hi Lavanya,
The BER analyzer chooses the best instant with the widest eye opening as the decision instant to calculate max. Q-factor. Now if you define any other instant, your Q-factor would not be as much, so you have to increase the power as a penalty to get the same Q-factor as the max. Q-factor.
Regards
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