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Re: [Discuss-gnuradio] Building a spectrum analyzer
From: |
Eric Blossom |
Subject: |
Re: [Discuss-gnuradio] Building a spectrum analyzer |
Date: |
Thu, 16 Jul 2009 09:28:33 -0700 |
User-agent: |
Mutt/1.5.18 (2008-05-17) |
On Thu, Jul 16, 2009 at 04:08:40PM +0200, Yc Park wrote:
> Hi all,
>
> Recently I started to build a spectrum analyzer with some extra
> functions such as channel power measurements and spectrum mask
> check.(so, fft_sink is not a good solution for this.)
>
> To do so, my plan is this:
> 1. get fft data vector of given size(2048) from usrp2 (data refresh rate
> ~= 5 bins/sec)
> 2. process the data vector with scipy functions
> 3. display it with matplotlib module
>
> But at this time I'm stuck at step2: how can get fft vector so that I
> can proccess it with scipy module?
> Connect() seems to connect blocks, not give out the data vector.
>
> Or the vector_sink.data is not a good choice since I do not have control
> over the data size.
Try a gr.message_sink like is done in fftsink_*.py
Eric