Thanks everyone and sorry , I couldn't reply you all for inputs you gave me. For Now , I kept aside the WBFM project which I asked about and working on the Guided Tutorials from GNU Radio and also tutorials from greatScott gadgets video series.
I have a dumb question about Rational Resampler... Here is the snapshot from tutorials website.. As far as I understand , the Rational resampler modifies the sampling rate of the incoming signal based on Interpolation (or) decimation factor.... Is it something like this *If my incoming Signal is of 10KHz with Sampling Rate of 50 KHz , Rational Resampler (Interpolation : 4 , Decimation : 1) gives me the output as signal of 10KHz and Sample Rate of 50*4 = 200 KHz ??????* Am I Interpreting it correctly... ?????? If thats the case , In the following snapshot , Signal of 1KHz of 48KHz Sample rate is interpolated by factor 4 , Then Output Sampling Rate should be 48*4 = 192KHz which is much higher than the Required Nyquist rate , But the Frequency sink block shows frequency component at 0.25 Hz... Is it because of the "samp_rate" variable set in QT GUI Frequency Sink.. [image: tutorial_two_4.png][image: resampling_output.png] On Tue, Aug 8, 2017 at 4:41 PM, Cinaed Simson <cinaed.sim...@gmail.com> wrote: > On 08/07/2017 07:55 PM, Ash SDR wrote: > > Hello Everyone , > > > > I am a GNU Radio beginner trying to implement Wideband FM Project and > > transmit it to my FM receiver at a very lower power. I am choosing a > > frequency in a FM band such that my receiver is not picking anything > > from that station/.. > > > > Attached is GRC file which i am working on .and the music file which i > > am trying to transmit.. > > > > Can anyone please tell me where I am messing up ? > > Remove the first rational resampler. Set your audio rate to 48000 Hz, > and quadrature rate 192000 Hz. > > In the second re-sampler set the interpolation to 8000000 Hz and the > decimation to 192000 Hz. > > I'm going to guess you're using the HackRF based on your default values > (except for the transmit RF gain which should be 1.) > > I strongly recommend you spend some time on the going through the > tutorials at > > http://www.greatscottgadgets.com/sdr > > and learn something about your hardware and how to build WBFM receiver > befor you try to transmit. > > -- Cinaed > > > > > > > > > > As a beginner , my learning curve is from implemented projects , > > University lectures which are available on-line .. This one is from a > > book which i am using to get basic understanding .. > > > > > > Thanks > > Ash > > > > > > _______________________________________________ > > Discuss-gnuradio mailing list > > Discuss-gnuradio@gnu.org > > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > > > > > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio >
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