Hi Tu,
I understand your point now. I cannot access inside all the blocks you mentioned (RX, TX and DSP) in that example in trial version either. At the same time, I don’t think (unfortunately I don’t have access to OptiSystem right at the moment to check it myself) that you can access all these blocks yourself and modify them (which, I agree, would be useful for a research). It seems like, as you mentioned, these blocks are “hard built”. Let’s wait for a final answer from Optiwave team…