Hi John, I've matched your configuration, with a N210 with GPSDO as master, and a N210 slave connected via a MIMO cable. I was able to create a pair of synced streams with the flowgraph attached without issue. Can you give it a try? Otherwise email us at supp...@ettus.com and we can follow up there.
Regards, Nate Temple On Thu, Sep 21, 2017 at 1:21 PM, Marcus D. Leech via USRP-users < usrp-users@lists.ettus.com> wrote: > That seems correct to me, but I don't have a useful configuration in my > lab to test. (No N2xx, no MIMO cables). > > > > > > > > > On 2017-09-21 16:02, John Shields via USRP-users wrote: > > Hi, > I have been struggling with trying to get two coherent channels from a > pair of N200 , one with GPSDO and the other with a MIMO cable. I realise > that, according to the sync_page doc, I need to do some software magic in > order to attempt to phase-sync but the slave unit reports that it cannot > detect the PPS in time. While trying various options (e.g. moving the GPSDO > from one N200r4 to the other) the conclusion appeared to be that each N200 > was OK and that either the MIMO cable was faulty (unlikely) or there is a > software problem with UHD. > > What I am now attempting to do is to take the GPSDO module out of the > equation and test purely the MIMO cable/software. I have separated out the > UHD sources in GRC so I have some control – not all control unfortunately > because if there is a GPSDO, it appears that it is detected and used no > matter the settings but that can be easily remedied. > > So, after removing UART connection on GPSDO, I have 2 free-running N200s > – I want to make one the 'master' so I have set Red: Sync = Don't Sync, > Clock Source = Internal, Time source=Default. > > On the other unit, Blue, I have set : Sync= Don't Sync, Clock Source and > Time Source= MIMO Cable. If I set the sync parameter to "unknown PPS" we > are back to the situation where there is no PPS detected. > > Are these the correct settings to test the integrity of the MIMO cable > and/or UHD sync software? > > Kind Regards, > > John > > > > > <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient> > Virus-free. > www.avast.com > <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient> > > _______________________________________________ > 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 > >
n2xx_mimo.grc
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