Yes. The problem was that MPM on the device was from build 3.11. You need at least 3.12, but might as well go for 3.13. You can re-flash the entire SD card or you can download the source to the N310 and recompile just MPM on the N310 and reboot. Rob
On Mon, Sep 10, 2018 at 1:51 PM yunli2004--- via USRP-users < usrp-users@lists.ettus.com> wrote: > Hi Rob, > > Have you resolved the N310 "No PPS detected" issue? We are facing same > problem where 3.12 and 3.13 are not working (No PPS detected) while 3.11 is > working fine. I traced to the same spot in code: get_time_last_pps returns > 0 always. > > Appreciate your help! > > Thanks. > Yun > > > > <quote author='Jason Matusiak via USRP-users'> > Hi, > I have mentioned some of these issues in other threads, but decided to > combine them all here in one post since there are a number of unresolved > issues. > > - Unable to 'Sync' using UHD 3.12 or Master. The resulting "No PPS > detected" error prevents us from running multiple channels > simultaneously > and is thus a big problem for us. This problem does not occur with UHD > 3.11. > - this problem can be demonstrated easily using default > "benchmark_rate" with multiple channels > - Error occurs in "set_time_unknown_pps()" because > "get_time_last_pps()" always returns zero and thus never changes > prior > to > the 1.5 second timeout > - Inaccurate Tx power output levels using UHD 3.12 or Master. The graph > below shows the issue of erratic Tx power levels using 3.12 (right plot) > and well-behaved Tx power levels using 3.11 (left plot) > - this problem can be demonstrated easily using default > "tx_waveforms" > - The multi_usrp functions set_tx_info() and get_tx_info() do not work > correctly with ANY version of UHD. This is not a major issue for us > because > we can work around it, but it would be nice if it was fixed. > - this problem can be demonstrated by creating a 'for' loop over the > number of TX or RX channels and simply calling the function > using the loop > index for the channel argument. An exception is thrown for some > channel > indices. > - Note that in 3.12, the function get_rx_info() works correctly, but > get_tx_info() does not work at all > - We were unable to get the external LO functionality working > correctly. We have not revisited this issue for a while, but I > previously > posted to the user's group on this problem. > > Rob > > [image: image.png] > > _______________________________________________ > USRP-users mailing list > USRP-users@lists.ettus.com > http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com > > > image.png (176K) > <http://ettus.80997.x6.nabble.com/attachment/10081/0/image.png> > > </quote> > Quoted from: > > http://ettus.80997.x6.nabble.com/USRP-users-List-of-Problems-with-N310-UHD-tp10081.html > > > _____________________________________ > Sent from http://ettus.80997.x6.nabble.com > > > _______________________________________________ > USRP-users mailing list > USRP-users@lists.ettus.com > http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com >
_______________________________________________ USRP-users mailing list USRP-users@lists.ettus.com http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
