Re: [Discuss-gnuradio] Issue with basic FM receiver

2019-09-12 Thread Marcus Müller
Hi Ludovico, On Thu, 2019-09-12 at 12:11 -0700, Ludovico Cavedon wrote: > Hi Marcus, > > Thank you for your reply. The Frequency Xlating FIR filter should be > already doing the decimation to being samp_rate down to 48k. Not really – it does a decimation by a factor of 20, whiche means your 1 MS

Re: [Discuss-gnuradio] Issue with basic FM receiver

2019-09-12 Thread Ludovico Cavedon
Hi Marcus, Thank you for your reply. The Frequency Xlating FIR filter should be already doing the decimation to being samp_rate down to 48k. However I found out that formula for the Quadrature Demod gain was using samp_rate instead of audio_rate (48k) and the gain was excessively high. Having fixe

Re: [Discuss-gnuradio] Issue with basic FM receiver

2019-09-11 Thread Marcus Müller
Hi Ludovico, you're definitely missing some resampling in there! Best regards, Marcus On Wed, 2019-09-11 at 13:25 -0700, Ludovico Cavedon wrote: > Hi, > > I am having hard time figuring out what I am doing wrong here. > If I use a NBFM Receive block, it works well, I hear the NOAA > transmiss