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Sergey V. Efimoff risky at mail.ruHello Dieter, I had once or twice seen BTS stations which had working PLL value very different from calibrated value. In order to get them close I had to use E1 hardware with high precision oscillator, then switch the hardware to the PLL-locked mode. This operation took me plenty of time. Please tell, is it possible to set the working PLL value directly? Best Regards, Sergey. On Dec 2, 2010, at 6:29 PM, Dieter Spaar wrote: > Hello Sylvain, > > On Thu, 2 Dec 2010 15:20:07 +0100, "Sylvain Munaut" <246tnt at gmail.com> wrote: >> >> The clock of the non working one might just be too off ... >> >> See http://openbsc.osmocom.org/trac/wiki/isdnsync for a tool to >> calibrate (with appropriate HW). >> >> If you don't have the equipement ... huh, good luck. >> You can always try random values until it works. >> If you have a USRP you can try to lock onto it and compare offset ... > > Its possible to set the clock calibration to a fixed value, this was > a feature introduced a while ago. The original clock calibration > setting workes pretty good, at least from my experience. So if the > clock is off due to using the E1 clock as a reference, it should be > enough to set the orginal clock calibration value and switch the > PLL to standalone mode. > > Best regards, > Dieter > -- > Dieter Spaar, Germany spaar at mirider.augusta.de >