I came across this question regarding SW setup:

I'm planning on using a 48MHz TCXO.
From the comment in the linked thread:
>By " improve radio performance", do you then mean requiring a smaller RX BW for a given signal bandwidth?
>Note that none of our software is currently written to safely handle TCXO timing.
What's different about TCXO timing that could be problematic? I had been interested in optimizing the narrow band performance