How does sampling rate affect the signals in GNU Radio?
We can see that resampling changes the sampling rate of our original signal by the resampling/decimation/interpolation factor. We then use the scaled sampling rate on a non-scaled sampling rate (our sinks) therefore the sinks appear to receive frequencies that are higher/lower than the original signal.
What is USRP in Gnuradio?
The USRP Source Block is used to stream samples from a USRP device (i.e. act as the receiver). There is no need to use a Throttle block when a hardware source like a USRP Source is used, because the USRP acts as the throttle. There are two methods of setting parameters and adjusting them while running.