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
>
> [1]
> Virus-free. www.avast.com [1]
>
> _______________________________________________
> USRP-users mailing list
> USRP-users@lists.ettus.com
> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
Links:
------
[1]
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
