Just throwing this out there, but your low pass filter has a cutoff frequency of 7.5 kHz. It looks like you are trying to use the Slider with the ID "width" to change the cutoff frequency of the low pass filter. It doesn't look like it's actually connected to your low pass filter though because the default value of the slider doesn't match the cutoff frequency value of the low pass filter. It would be easier if you attached your .grc file instead of just a picture.
On Fri, Oct 16, 2015 at 12:30 PM Hoang Nguyen Tran <[email protected]> wrote: > Does anyone have the experience on this ? > I can receive and decode 1200 bps signal, but still no luck with 9600 bps > signal :( > > On Thu, Oct 15, 2015 at 2:04 PM, Hoang Nguyen Tran <[email protected]> > wrote: > >> Hi, >> Regarding to this problem, I tried to use UDP sink to replace Audio sink >> or Wave file sink, then try to receive audio in on another computer with >> decoding software by VLC. >> >> When I run the VLC with command : vlc --demux=rawaud --rawaud-channels=1 >> --rawaud-samplerate=48000 udp://@:7355 >> I was able to here the sound coming from VLC, however, the sound was >> choppy, the same with audio under-run. Does anyone have explanation for >> this ? >> >> I set the UDP sink with these parameters: >> >> Payload size :1500 >> Send NULL Pkt as EOF : True >> Vec length : 1 >> >> Thanks a lot, >> Hoang >> >> On Thu, Oct 15, 2015 at 10:53 AM, Hoang Nguyen Tran <[email protected]> >> wrote: >> >>> Hi Marcus, >>> >>> I put a variable for that, and usually I put in 24kHz for signal >>> bandwidth in Low Pass filter. >>> >>> >>> >>> >>> On Thu, Oct 15, 2015 at 10:46 AM, Marcus Müller < >>> [email protected]> wrote: >>> >>>> 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 <[email protected]> wrote: >>>> >>>>> On Wed, Oct 14, 2015 at 2:47 PM, Hoang Nguyen Tran < >>>>> [email protected]> 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 >>>> [email protected]https://lists.gnu.org/mailman/listinfo/discuss-gnuradio >>>> >>>> >>>> >>>> _______________________________________________ >>>> Discuss-gnuradio mailing list >>>> [email protected] >>>> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio >>>> >>>> >>> >>> >>> -- >>> -HoangNT- >>> PhoneNo : +841654248782 >>> Skype : hoangastro >>> FB : https://www.facebook.com/kenshin.rorouni >>> >> >> >> >> -- >> -HoangNT- >> PhoneNo : +841654248782 >> Skype : hoangastro >> FB : https://www.facebook.com/kenshin.rorouni >> > > > > -- > -HoangNT- > PhoneNo : +841654248782 > Skype : hoangastro > FB : https://www.facebook.com/kenshin.rorouni > _______________________________________________ > Discuss-gnuradio mailing list > [email protected] > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio >
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