Re: [Discuss-gnuradio] DVB-T/T2

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.xxx@gnu.org [mailto:discuss-gnuradio-bounces+ralph=schmid.xxx@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.