Hello All, I'm trying out jean-michel.friedt's course on digital communications and have a problem with getting two radio stations to play simultaneously. I have tried to follow jean-michel's example, but am getting caught somewhere. I get one radio station and hiss on the other.
I've tried a few combinations, but haven't got a logical successful solution. I am choosing two local radio stations and can tune them independently. The first radio station is the osmocom source ch0 frequency. This station I can tune without trouble. The second station is determined by s frequency translating filter and I make the center frequency a negative difference between the ch0 frequency and it's nearest neighbour. In this case I'm choosing ch0 frequency 90.7e6 and center frequency -800e3. (For a radio station at 91.5 MHz.) Somewhere here I am getting into trouble. This station can be heard but is mostly hiss. I'm including my grc file and a screenshot of my flow graph with the hope that someone can point me to my error. Thanks in advance. Chris
fdma2.pdf
Description: Adobe PDF document
fdma2.grc
Description: application/gnuradio-grc
