Re: [Discuss-gnuradio] grc amplitude demodulation questions

2011-02-04 Thread Tom Rondeau
On Fri, Feb 4, 2011 at 5:43 PM, Alexandru Csete wrote: > On Fri, Feb 4, 2011 at 9:33 PM, 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: >> >> w

Re: [Discuss-gnuradio] grc amplitude demodulation questions

2011-02-04 Thread Alexandru Csete
On Fri, Feb 4, 2011 at 9:33 PM, 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

Re: [Discuss-gnuradio] grc amplitude demodulation questions

2011-02-04 Thread ematlis
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. Thanks, eric --- On Fri, 1/14/11, Josh Blum wrote: > From: Josh Blum > Subject: Re: [Discuss-gnuradio] grc amplitude d

Re: [Discuss-gnuradio] grc amplitude demodulation questions

2011-01-14 Thread ematlis
--- On Fri, 1/14/11, Josh Blum wrote: > From: Josh Blum > Subject: Re: [Discuss-gnuradio] grc amplitude demodulation questions > To: discuss-gnuradio@gnu.org > Date: Friday, January 14, 2011, 2:14 PM > > > I believe the code is already doing this.  Here > are code seg

Re: [Discuss-gnuradio] grc amplitude demodulation questions

2011-01-14 Thread 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 b

Re: [Discuss-gnuradio] grc amplitude demodulation questions

2011-01-14 Thread Marcus D. Leech
On 01/14/2011 02:56 PM, emat...@yahoo.com wrote: > Martin, thanks for responding. See my follow ups below: > --- On Thu, 1/13/11, Marcus D. Leech wrote: > > >> From: Marcus D. Leech >> Subject: Re: [Discuss-gnuradio] grc amplitude demodulation questions >>

Re: [Discuss-gnuradio] grc amplitude demodulation questions

2011-01-14 Thread ematlis
Martin, thanks for responding. See my follow ups below: --- On Thu, 1/13/11, Marcus D. Leech wrote: > From: Marcus D. Leech > Subject: Re: [Discuss-gnuradio] grc amplitude demodulation questions > To: discuss-gnuradio@gnu.org > Date: Thursday, January 13, 2011, 4:26 PM > > He

Re: [Discuss-gnuradio] grc amplitude demodulation questions

2011-01-13 Thread Marcus D. Leech
Hello- I am using GRC 3.3 to create a flow graph using the USRP2 and a LFRX to do amplitude demodulation. I have a few questions. 1) What are good values for "Audio Pass" and "Audio Stop" within the "AM Demod" block? 2) I observe a DC offset at the output of the demodulation. Is this expect