Hmm, now I see, there is an option "constellation rotation" in the modulator block. Maybe this is not an accident, but wanted behavior?! I will check this evening...
Ralph. From: discuss-gnuradio-bounces+ralph=schmid....@gnu.org [mailto:discuss-gnuradio-bounces+ralph=schmid....@gnu.org] On Behalf Of Ralph A. Schmid, dk5ras Sent: Tuesday, April 7, 2015 06:39 To: discuss-gnuradio@gnu.org Subject: [Discuss-gnuradio] DVB-T/T2 Hi, With Rons help I got the DVB-T/T2 flowgraphs up and running. DVB-T works great, no issues at all, while DVB-T2 is somehow flaky in reception. When using a cheap DVB-x tester, the DVB-T2 constellation is phase shifted. I have no real world T2 signals to compare, but at least the tester shows normal constellation views when looking at S and T signals off the air. This is how things look: http://dk5ras.dyndns.org/tmp/DVB/ The flowgraphs are almost original, just adopted to the USRP B210, and I added channel slider... Any ideas what I could tweak? Ralph.
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