Are you using the "Constellation Modulator" block? It's really a
hierarchical block with a root raised cosine filter. So you're not
going to see the original constellation points.
If you just want to see constellation points with the QT GUI
Constellation Sink block, you can try the DVB-S2X Modulator in the
Digital Television component. It has a bunch of built-in
constellations. Or you can use the "Chunks to Symbols" block and
define your own constellation.
That's just a starting point. Actual EVM measurements is a complex
topic.
Ron
On 06/07/2018 03:24 AM, Luis Felipe
Albarracin Sanchez wrote:
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