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[Discuss-gnuradio] Problem with Probe Signal Vector Block

From: Björn Staufenbiel
Subject: [Discuss-gnuradio] Problem with Probe Signal Vector Block
Date: Thu, 07 Aug 2014 17:15:01 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.5.0


I made a Flowgraph in GNU Radio which shows me the FFT of the samples that are sent by a Raspberry Pi over TCP. It looks like this:

Osmosdr Source -> Stream to Vector -> FFT -> Complex to Mag -> Log10 -> Vector to Stream -> Moving Average -> Stream to Vector -> Probe Signal Vector

I want to save the values of the FFT in a list in my Python program later. Now what I tried to do was to plot the probed vector with Matplotlib. I also replaced the last Stream to Vector Block and the Probe Block with a QT Time Sink to control the output. But the picture I get with Matplotlib is totally different. So my question is if this is a problem of how to do the probes on the signal vector or if it could be a problem of Matplotlib.

Thank you in advance!

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