Hi guys! I am trying to calculate the Depth of Modulation <https://en.wikipedia.org/wiki/Amplitude_modulation#Modulation_index> of an AM signal using GNU Radio, but I just can't make it work.
To test, I am using a Rode & Schwarz SMB100M signal generator connected to a USB SDR receiver <http://www.nooelec.com/store/sdr/nesdr-smart-sdr.html> . The connection between them is via cable. - In the signal generator, I'm using these settings <http://i.imgur.com/dYwomJn.jpg> . - In GNU Radio, I'm using this diagram <http://i.imgur.com/YvYZtZ7.png> . I know the diagram is wrong (it's illustrative only), but it's exactly here where I need you help. What I'm trying to achieve is to obtain in GNU Radio the same depth of modulation as the one set in the signal generator. For instance, if the generator is set to a depth of 56% (just like in the first image), I'd like to get that exact(ish) same number in a GNU Radio sink. As you may have realised at this point, I'm not even near to be an expert in signal processing and I have not been able to find anything about this googling around. Any help will be highly appreciated. Thanks! -- View this message in context: http://gnuradio.4.n7.nabble.com/Help-needed-to-obtain-AM-Depth-of-Modulation-tp63826.html Sent from the GnuRadio mailing list archive at Nabble.com. _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
