Capturing data from various stages of modulation and demodul

Hi,

What would be the best way to capture the raw data as it is passed from
each
block within GNURadio and represent in a GUI form?
Basically, if I send a “Hello World” from one machine to another, I can
see
it at the other end, but I am interested in somehow capturing and
viewing
the data as it passes through each stage in GNURadio, after I generate
in
the tunnel.py example.

Any views on how I could do this?
I was exploring into representing the captured data as constellations,
but
didn’t know if I was proceeding in the right path.

Thanks in advance,
Naveen

What would be the best way to capture the raw data as it is passed from
didn’t know if I was proceeding in the right path.

Thanks in advance,
Naveen

Naveen,

All of the digital modulators have a ‘log’ flag you can enable, which
will
drive every part of the modulator and demodulator to its own data file.
If
you want to see the constellation, you can look at
“rx_mpsk_receiver.dat” (I
think that’s what it’s called) using MATLAB/Octave and the
read_complex_binary function provided in the gnuradio-core/src/utils.
This
returns a complex number, so plot(real(dat), imag(dat)).

Tom

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