Dear Damian,
I am having some other problems regarding the BER Test set.
When I use the Set OSNR and BER Test set to plot BER vs SNR in PPM modulation (e.g 2 bit per symbol), I always receive the result in the BER Test set that BER ~ 0.5 or BER = 0. I tried to change the sequence length but it still had the same result. There is no linear BER result as expected when I sweep SNR parameter from 0 -> 25 dB.
Moreover, when I put the Set OSNR in the project, I notice that the binary signal at the output of Data Recovery is not the same as the signal at the output of PPM Coder every time I change the SNR parameter, although the signals of two outputs are the same before using Set OSNR (as I followed your project to compensate time delay in Data Recovery).
I would like to ask what should I do to receive a linear BER result? Do I need to adjust the Delay Compensation parameter in Data Recovery every time I change the SNR?
Thank you very much for your consideration.
Sincerely,
Jake.