> From: > Fernando > Subject: > [Discuss-gnuradio] WBFM > modulation/demodulation high > frequencies highly attenuated > Date: > Wed, 26 Apr 2017 20:02:29 +0200 > > > > ______________________________________________________________________ > I'm modulating/demodulating a wide band FM signal and I observe that > high frequencies are highly attenuated. > > This is the diagram > > > High frequencies are attenuated more than 40dB over low frequencies. > > It seems to happen for frequencies above 20Khz. > > Changing max deviation in WBFM Transmit has no effect. > > What am I doing wrong?
You are making a bad assumption about what the WBFM block actually does. See the audio filter cutoff and attenuation level in the WBFM Tx block here: https://github.com/gnuradio/gnuradio/blob/master/gr-analog/python/analog/wfm_tx.py#L67 -Andy _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
