I use a file sink block in my flow graph to record samples
from a USRP N210. I start the flow graph and then after some
time starts to record using the file sink block by switching
it on using a selector block.
My question is, when the file sink is activated, is the
flow graph in any way restarted?
I have attached a plot of the real part of the samples I
recorded. I see strange behavior in the beginning as I would
expect if I instantly started to record when the flow graph is
started (due to the time it takes for the radio to tune in).
The reason to why I am asking is that I suspect that the
phase of the signal is changed when I start to record, and
maybe this could explain why.