I have a couple of questions about the GnuRadio QT GUI Frequency Sink Block , 
which allows you to specify FFT size and update rate.

*  My understanding it that , when it is time go compute another spectrum 
according to the update rate setting,  the block will  grab the most recent N 
samples to do so; so that any IQ data coming in between updates is dropped on 
the floor.  Right?

* The blocks output is a graphical plot.  If anything in the system causes the 
graphics to really slow down,  will it also slow down the spectrum update rate 
to less than the configured setting?

The above are Gnuradio questions, not usrp questions,  so if this is the wrong 
place for them I apologize.

rb
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