Doug, Working only on my single channel setup, what appears to happen is that there is the time stamp for the first sample in the frame. The frame alignment seems to remain a function of when the device was turned on.
Now if sync_every_pps worked with the 31 December 2008 firmware. I think I need to wait for a newer FPGA/VHDL firmware release for that to happen. Charles -----Original Message----- From: discuss-gnuradio-bounces+csuprin=mitre....@gnu.org [mailto:discuss-gnuradio-bounces+csuprin=mitre....@gnu.org] On Behalf Of Douglas Geiger Sent: Friday, February 13, 2009 2:02 PM To: discuss-gnuradio@gnu.org Subject: Re: [Discuss-gnuradio] USRP2 PPS and REF Ok - so I have packets coming in from both USRP2's now, getting dumped to their separate files. My app prints out the timestamp of each frame that gets sent to the copy handler: if my 1PPS source is working properly, should the timestamps coming out of the two USRP2's be identical? Another question: no matter what, there is going to be some time delay between when I tell one USRP2 to start, and when I tell the other one to start: with the timestamps I could do something like align_on_samplenumbers (but with the timestamps - at least I could do this in the copy handler where I have access to this information). Of course this requires that the timestamps do end up being based on the 1PPS. Should I take that as a sign my USRP2's are not currently getting sync'd to the 1PPS? Thanks, Doug -- Doug Geiger Research Assistant Communications and Signal Processing Lab Oklahoma State University http://cspl.okstate.edu douglas.gei...@okstate.edu doug.gei...@ieee.org _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
