Thanks for the fix. I tested it on my USRP1 + 2 DBSRX system and it seems to work.
There are couple of remaining issue though. 1. The instability problem is still there. If I keep restarting my app, USRP1 seems to come up in a state where I get either corrupted IQ signal (in what way, I don't know. Sometime lower SNR, sometimes flat garbage) or one of the initialization UHD calls (multi_usrp::make, set_rx_freq, etc) just hang and require device power cycle. It doesn't take many trials to hit this state. I don't have this issue when I use the gnuradio framework. Note that I've been having this issue with E100 (w/ a RFX dboard) as well so I don't think it's a motherboard or DBSRX specific problem. 2. The latest UHD repository master (4/27) seems to have a serious regression for E100. I get data samples coming in but expected signal is not there (or corrupted in serious way). As I replied to you in another thread, I saw this happen also with the "usrp_e100_frame_size2" branch you posted for me on 4/26 and merged to the master today. In any case, my E100-friendly UHD git version is from 4/19, so it looks like the regression happened at some point between then and now. For now I will use the latest master for my USRP1 and keep the old one for E100. :) Michael On Wed, Apr 27, 2011 at 1:25 PM, Josh Blum <j...@ettus.com> wrote: > > > It feels as though the subdev config in general is quite unstable > > for my multi-channel setup or my code is missing something very basic. > When > > I double check the freq and gain settings with the get functions, they > all > > look fine though. > > > > Any insights? > > > > It turns out that the RX mux was calculated in reverse. Effectively, the > channels were swapped. This would have been hard to notice on a pair of > boards with frac-N synthesizers, but with DBSRX, the DDC offset made it > noticeable. I pushed a fix to the master: > > > http://code.ettus.com/redmine/ettus/projects/uhd/repository/diff?rev=1e7227319cdf9098c6ddf344ad5bbd2c82ca2cda&rev_to=3dfdda7c82b65fe3acbdadcafde3e93e129345d2 > > Thanks, > -Josh > > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio >
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