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Alexander Chemeris alexander.chemeris at gmail.comHi Max, Multi-trx works properly with UmTRX which is our reference platform. We've also done partial testing with OpenCellular - spectrum analyser showed that TX is fine, but we haven't tested with a phone. With UmTRX we tested everything. Since OpenCellular is a B210 derivative, it should work fine as well. Could you try adding -x option to osmo-trx to enable external clock? If you have a spectrum analyser, I would recommend you to use it to test the signal and frequency offset of the signal. On general, if everything starts and you don't see a network, it's most likely a clock or RF issue. For -m option fail it would be great if you create a ticket and attach logs. Please excuse typos. Written with a touchscreen keyboard. -- Regards, Alexander Chemeris CTO/Founder Fairwaves, Inc. https://fairwaves.co On Mar 3, 2017 12:17 PM, "Max" <msuraev at sysmocom.de> wrote: > Hi. > > There's been few updates to osmo-bts-trx recently so I've decided to get > back to https://projects.osmocom.org/issues/1648 and it seems like it's > completely broken: > - the "multiplexing" option (osmo-trx -m -c 2) which used to work now > leads to startup error of osmo-trx > - the "separate channel" option (osmo-trx -c 2) which wasn't working > properly but at least phone could see the network, now leads to situation > where no network is visible > > Am I missing some magic combination of .cfg and command-line parameters > which could make it work? Am I using too old version of uhd or smth else? > > The hw has not changed (usrp b210 + external 10MHz reference clock) but > maybe I've got to do some calibrations on it? > > Any ideas as to what could be causing those regressions? > > Is there anyone out there for whom some multi-trx setup is working? If so, > I'd like to compare notes to understand why it isn't working form me. > > -- > Max Suraev <msuraev at sysmocom.de> http://www.sysmocom.de/ > ======================================================================= > * sysmocom - systems for mobile communications GmbH > * Alt-Moabit 93 > * 10559 Berlin, Germany > * Sitz / Registered office: Berlin, HRB 134158 B > * Geschaeftsfuehrer / Managing Director: Harald Welte > > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.osmocom.org/pipermail/openbsc/attachments/20170303/7aea7f46/attachment.htm>