Hello,
For your information, here's an application for DAB (Digital Audio
Broadcasting) Single Frequency Network transmission using newest USRP with
external synchronisation:
http://tech.ebu.ch/news/ebu-collaborates-on-successful-dab-sfn-m-17jul12
It's working well in the lab but we have not been able to test on the field yet
because one of the just ordered used Thunderbolt clock has a problem.
The student (in copy) had built his own GPS clock based on ublox module but the
jitter is too important when tuning it at 10MHz (check his report).
He's considered sending the base frequency directly but this would require some
modifications in the USRP.
The other thing we noticed is that with a DAB signal, there's a periodic null
symbol (around 100ms without any power) and some of the WBX/USRP have problem
with that, when the signal returns it peaks and then decreases again. It looks
like an AGC problem. Have some of you already experienced this ?
Regards
Mathias Coinchon
_______________________________________________
Discuss-gnuradio mailing list
Discuss-gnuradio@gnu.org
https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
