Re: [Discuss-gnuradio] spectrum analyzer

[Trond Danielsen]

2007/6/13, Abram Young <address@hidden>:
> Hi,
>
> I'm a recent gnuradio/python user (newbie) and have played with the python
> pieces and USRP as far as time will allow for now.  I can write my own
> program to record A/D streams to disk, but that's about it.  I'm using
> Octave to read in and plot the streams then.
>
> I'd like to either modify the usrp_fft.py code, or add the fft_sink call
> to my own .py (preferred) and output to stdout.  Specifically, I need to
> access the data from fft_sink to find the maximum, and output it's
> frequency/value.  How do I do this?

You can either use the gr.max_xx or gr.argmax_xi blocks that are
available in trunk to get the maximum value or the argument of the
maximum value from the FFT.

Or you can just sink the signal to a vector sink, and process the
recorded signal with numpy/scipy or octave/matlab if that is your cup
of tea.


--
Trond Danielsen