Re: [Discuss-gnuradio] Help needed to obtain AM Depth of Modulation

Dear Matt, > - If I set the generator at 50% modulation depth and I simply plot the > source input, I get this result , which > is different from the graph from Wikipedia Looks like clipping on either the TX or RX side. Reduce the output amplitude of the signal

Re: [Discuss-gnuradio] Help needed to obtain AM Depth of Modulation

I've been doing some tests, and something strange is happening: - If I set the generator at 50% modulation depth and I simply plot the source input, I get this result , which is different from the graph from Wikipedia

Re: [Discuss-gnuradio] Help needed to obtain AM Depth of Modulation

Wow! Thanks for taking the time to put this together. I'll try following those steps and let you know how it goes. Thanks again! -- View this message in context: http://gnuradio.4.n7.nabble.com/Help-needed-to-obtain-AM-Depth-of-Modulation-tp63826p63839.html Sent from the GnuRadio mailing list

Re: [Discuss-gnuradio] Help needed to obtain AM Depth of Modulation

You are totally right. I need it to be RF input independent, so I'll try following your advice. Thanks a lot! -- View this message in context: http://gnuradio.4.n7.nabble.com/Help-needed-to-obtain-AM-Depth-of-Modulation-tp63826p63838.html Sent from the GnuRadio mailing list archive at Nabble.co

Re: [Discuss-gnuradio] Help needed to obtain AM Depth of Modulation

I would start with source -> low pass filter(complex) - rational-resampler(complex) -> am demod -> number sink(float). I have never used the AM Demod block and I have never calculated the Modulation Index for AM. But it does appear you have a plumbing problem. I would start with changing the

Re: [Discuss-gnuradio] Help needed to obtain AM Depth of Modulation

On Wed, May 10, 2017 at 3:31 AM, Matt Cooper wrote: > Hi guys! > > I am trying to calculate the Depth of Modulation > of > an AM signal using GNU Radio, but I just can't make it work. > ... > - In GNU Radio, I'm using this