Re: [Discuss-gnuradio] grc amplitude demodulation questions

[Josh Blum]

> I believe the code is already doing this.  Here are code segments for
> 2 fft guis.  The first shows the fft of the raw output of the USRP2.
> This gui responds correctly.  Notice the line:
> "sample_rate=100e6/usrp2_decim", so I assume that as I dynamically
> adjust usrp2_decim, this value is being updated.  However, with the
> second fft, while there is a similar line:
> "sample_rate=100e6/usrp2_decim/sw_decim" that includes the software
> decimation value, this fft gui does not correct the position of the
> fft when I dynamically change sw_decim.  The x-axis DOES change, but
> the peaks in the spectrum just stay fixed in their relative
> positions.  Any thoughts?
> 

Where else is sw_decim used? Is it used in a parameter that can be
changed at runtime? Look at the generated source code, see set_sw_decim

-Josh