On Fri, Feb 4, 2011 at 5:43 PM, Alexandru Csete <oz9...@gmail.com> wrote: > On Fri, Feb 4, 2011 at 9:33 PM, <emat...@yahoo.com> wrote: >> >> Getting back to my question about adjusting decimation on the fly, and >> having the FFT sink adjust to show the spectrum correctly, I have an example >> of what I am doing on my site at: >> >> www.nd.edu/~ematlis/z.gnuradio >> >> There's a jpg and the grc file there. If anybody would care to take a >> look and comment, that would be great. Basically, I want to dynamically >> adjust the software decimation going on in the AM Demod block, and have the >> result shown correctly in the FFT sink. What I am seeing is the x-axis of >> the FFT changes, but not the position of the spectrum. A variable slider is >> used to control the decimation value in the AM Demod block, and the Sample >> Rate in the FFT sink is dependent on the same variable, but something is not >> correct. >> > > The AM demodulator block does not support changing decimation during > runtime. You can check: > gnuradio-core/src/python/gnuradio/blks2impl/am_demod.py > It has no methods for changing any parameters. > > However, you can implement your own AM demod (it's very simple) and change > the decimation of the low pass filter - that should work. > > Alex
And feel free to contribute that improvement back, please! Tom _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
