This is merely a historical archive of years 2008-2021, before the migration to mailman3.
A maintained and still updated list archive can be found at https://lists.osmocom.org/hyperkitty/list/osmocom-event-orga@lists.osmocom.org/.
Neels Hofmeyr nhofmeyr at sysmocom.deOn Tue, Nov 06, 2018 at 04:06:04PM +0100, Ralph A. Schmid, dk5ras wrote: > My experiences with SDRs are quite positive. But for a "production" setup, you do get all sorts of odd errors showing up that make you examine potential bugs and whatnot, when they were simply timing errors from the lack of SDR timer precision. The Ettus B210 worked pretty well for me, at least for some while. Every now and then nonsense came up. At some points I wasn't able to attach for many attempts in a row, etc. You can add a high precision timing source or a GPSDO to alleviate that. But in the end a proper sysmoBTS cuts short all of that BS and gives me the best fun per effort ratio. It happens more often than not that we get bug reports from customers for some Osmocom misbehavior, and it turns out the cause was an SDR with improper timing accuracy. Especially with testing handover, I found that even two sysmoBTS fail when they are improperly calibrated. I don't think an SDR without GPSDO/external clock has even a chance there. (The XTRX claims to have good timing, haven't tested) > Especially small cells covering only one or two rooms work quite good, even > without duplexer, and only with two rabbit ear TX/RX antennae. To create coverage for 35c3? :) > Even a RasPi 3B is powerful enough The core net system isn't that critical, you can even run Abis over Satellite backhaul with near infinite latency. The problem is tightness of the RF. > With the LimeSDR I only played with narrow band stuff like osomocom-analog, > but this also runs very stable on a RasPi, delivering stable analog cell > coverage over days without any issues. Should be not so different with GSM. Let's not make assumptions on GSM based on analog cell :) I have no idea about analog cell, but I assume it is worlds apart... > About this 850 MHz assignment, what ARFCNs are officially available? So far none yet, will probably keep you posted here. ~N -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 833 bytes Desc: not available URL: <https://lists.osmocom.org/mailman/private/osmocom-event-orga/attachments/20181106/c93d33e2/attachment.bin>