[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
SV: [Discuss-gnuradio] Samples alignment of two USRP2s with seperate eth
SV: [Discuss-gnuradio] Samples alignment of two USRP2s with seperate ethernet ports
Tue, 8 Sep 2009 16:18:01 +0200
Yes we have solved it but it is not perfect yet,
probably due to jitter in clocks, the threshold level at the 1PPS input and the
quality of the 1PPS and 10MHz signals. The topic have also been touched
I'm quite new to USRP2. We are building a wideband MIMO receiver with two
USRP2s. In order to archieve high bandwidth (20MHz) we have to use two
independent ethernet ports to host computer.
The question is how to get the the raw samples from different ethernet
ports aligned. We plan to use a common 10MHz ref clock and 1 PPS source
synchronizing the two USRP2s. However, as the softwares for the two boards are
not starting exactly in the same time, there should be a fixed delay
between the two channels of samples. How to get over this?
I read from this thread
regarding maybe the same issue. Has it already been solved?
Thank you in advance.