Problem in simulation of Buffer selector in TWDM PON

Hello ranjeet,
Are you using buffer selectors for in cooperating delay in the design? I presume so..
regards

hi ranjeet kumar….
Well i think Buffer selector is used for iteration in our layout mean you can select the particular iteration result through this buffer selector.
As already discussed by Damian Marek in one of the post the buffer selector is a simulation tool to grab certain signals (from the different signal iterations) generated in bidirectional or loop simulations.
As suggested by him you can go through the bidirectional tutorial:

Lesson 5: Bidirectional Simulation — Working with Multiple Iterations

With regards

As for as your error is concerned it may be because of buffer selector when it calculates again n again then reason would be any free port.check all the ports in system if any port is free then attach null signal there.
For your reference i am attaching few links in which you might find some help regarding this problem,

TWDM PON

BUFFER SELECTOR

with regards

Hi ranjeet

If you are using multiple iterations in your design but you wish to check the output only for a specific iteration,buffer selector can be used to select the required iteration.
But I don’t think the system should take longer to simulate just because you are using a selector in your design.Anyway if that is an issue you can run your simulation without the selector because anyway its significance is to filter out the required iteration to make the result evaluation easier.
And for BER and Q.Factor US results increase the signal index which you can find on the right top extreme of the analyser window.

Hope all this helps

Regards