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From: | Marcus Müller |
Subject: | Re: [Discuss-gnuradio] GNU Radio Tutorial Example Doesn't Work |
Date: | Mon, 14 Nov 2016 13:55:42 +0100 |
User-agent: | Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.3.0 |
Hi Gilad, find something that actually produces a singing sine attached.
Notice that the waterfall sink display isn't "perfect" by means of
being a constant-height zig-zag line. But that was never to be
expected – the DFT simply produces higher amplitudes at
frequencies that are actually exactly "hit" by the signal, and
since the signal frequency changes continously, this can't be
always the case. I don't think I can salvage the example – it's really an
illustration of what not to do with a signal probe; if you want
one signal to somehow modulate the other, you'd always (and that's
the whole idea behind GR) combine the two sample streams, and not
employ some inaccurate, hackish python-function-probing mechanism.
So please don't take the example from the wiki as guideline for
building modulators! Marcus On 14.11.2016 13:23, Marcus Müller
wrote:
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singing sine.grc
Description: application/gnuradio-grc
singing sine.grc.png
Description: PNG image
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