Re: Commercial MSs do not see the network

hi, On 2/12/20 8:15 PM, Tomcsányi, Domonkos wrote: [...] i regulary use a b200/b210 series for tests, so i am quite sure it works when using a known good clock. try sending a external clock to the device, for example a 10MHz gpsdo or another source which you can trust. sometimes even old lab equipment can be used as a source when it has a reference clock output (typically bnc). enable using it by adding to your osmo-trx.cfg: trx clock-ref external the internal clock generation on generic sdr boards (which are not targeted at gsm/tdma systems) are often not precise enough. this is true for the basic usrp series as well as simple boards like the limesdr mini or usb(which you also can feed a clock). in contrast: the limenet micro has a gpsdo on board for exactly this reason. the same is true for boards like the UmTRX, or when you add an precision source to a usrp. i think there is a module to add gps for the usrp. i hope this gets it working for you. kind regards. -- - Joachim Steiger <jsteiger(a)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 Directors: Harald Welte