Hi Hoang, are you sure you want to reduce the FM signal bandwidth to 6kHz in the Low Pass filter?
Best regards, Marcus On 10/15/2015 04:38 PM, Hoang Nguyen Tran wrote: > Hi Tom, > Thank for replying, Below is my narrow band fm receiver base on nbfm > rx from http://www.oz9aec.net/ > I was able to receive and decode with ISS and other sat with 1200 baud > rate, but did not success with 9600 baud rate. > > On Thu, Oct 15, 2015 at 10:11 AM, Tom Rondeau <t...@trondeau.com > <mailto:t...@trondeau.com>> wrote: > > On Wed, Oct 14, 2015 at 2:47 PM, Hoang Nguyen Tran > <hoangn...@gmail.com <mailto:hoangn...@gmail.com>> wrote: > > Hi all, > > I have question related to audio bandwidth cutoff. > Yesterday, I received very good signal from STRaND satellite > 9600 bps, FSK modulation. > I used audio sink to record the signal then used it for decoding. > However, I was unable to decode signal, then I ask some > another ham radio expert and he said because of my audio > bandwidth cut off for some unknown reason is 3000 so it is > unable to decode. > > Do anyone know why and how can I change the audio bandwidth > cut off ? > I used the normal WAV file sink with set up: sample rate > 48000, N channels : 1 and Bít per sample 16. > Thank for your time and I appreciate any comment. > > Best regards, > Hoang > > > Hoang, > > It's nearly impossible to help you here since you've given us no > information on your setup. Yes, sample rates and filter bandwidths > matter in this. You've likely got some numbers in your flowgraph > wrong. > > Tom > > > > > > -- > -HoangNT- > PhoneNo : +841654248782 > Skype : hoangastro > FB : https://www.facebook.com/kenshin.rorouni > > > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
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