Hi Paul, Based on the block diagram <https://files.ettus.com/manual/page_usrp_n3xx.html#n3xx_rh_lo_sharing>, I think I would set both LOs to use an external source. I would set the Tx0 export the LO on Tx Output 0 and then route it directly back into Tx Input 1 which then goes to a 1:2 splitter to feed both inputs. In addition to exporting the LO and setting the LO source to external for both ports, you also need to enable the Tx Output 0 (disabled by default). I've forgotten the command to do so. Rob
On Fri, Jan 14, 2022 at 1:11 AM Paul Atreides <maud.dib1...@gmail.com> wrote: > I am trying to configure the N321 to take some TX phase measurements > between RF0 and RF1 > I have updated the file system to the latest release using the KB > guidance. > > My host/software side is: > GNURadio 3.9.5 > UHD 4.1.0.5 > Ubuntu 20.04 > > My gr-uhd block has the LO settings: > Channel 0 export = true > Channel 0 LO = internal > > Channel 1 export = false > Channel 1 LO = external > > On the hardware side am I understanding the LO diagram correctly that in > order to achieve the highest phase accuracy between channels i need to > share the LO between the transmit ports of RF0 and RF1? > If so, would I do that by physically connecting the TX LO OUT0 (really > 0-3) to TX LO IN1? > > Am I missing anything obvious for the settings and/or is there a more > desirable way to do this? > > Thanks > > <end transmission> > _______________________________________________ > USRP-users mailing list -- usrp-users@lists.ettus.com > To unsubscribe send an email to usrp-users-le...@lists.ettus.com >
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