BER Tester V/s Standard PRBS Generator
I want to know what is the difference between BER Tester and standard PRBS Generator in the Optisystem. I am using OFDM modulation with 4 level QAM. I want to plot the graph of BER v/s SNR. For this i have inserted BER Tester in the layout but now the constellation, SNR are changed for the same data rate as measured with standard PRBS Generator ? May i know what is the reason for this ??
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