Thanks everyone and sorry , I couldn't reply you all for inputs you gave me. I apologies for that...
For Now , I kept aside the WBFM project which I asked questions on 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..
I am also playing around with "samp_rate" block in QT Frequency GUI Sink... If i remove rational resampler and just pass on the signal of 1Khz with 48Khz sampling rate in a QT GUI Frequency sink of samp_rate/4 , it outputs the signal as 0.25KHz ///. why so >
Please let me know If i am interpreting it correctly as THIS IS VERY IMPORTANT FOR ME TO UNDERSTAND..