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Andrey Sviyazov andrey.sviyazov at fairwaves.ruHi Thomas. Could you please make an file from the OpenBTS stream as an cycled sequence to use with tx_samples_from_file.exe. I would like to test my UmTRX under windows with good instrument in Moscow (I hope to find it soon). Best regards, Andrey Sviyazov. 2012/7/23 Thomas Tsou <thomastsou at gmail.com> > On Sun, Jul 22, 2012 at 3:27 PM, Alexander Chemeris > <alexander.chemeris at gmail.com> wrote: > > On Sun, Jul 22, 2012 at 11:11 PM, Thomas Tsou <thomastsou at gmail.com> > wrote: > >> On Sun, Jul 22, 2012 at 10:12 AM, Andrey Sviyazov > >> <andrey.sviyazov at fairwaves.ru> wrote: > >>> Hi Thomas. > >>> > >>> It is very good new. > >>> Please let us know more information how you wins! > >>> I mean which PLL filter, ICP and other LMS paremeters do you use or > its done > >>> by just only IQ balance correction and Laurent C1 pulse and all other > by > >>> default? > >> > >> Register dump and startup sequence are attached. > > > > Uhm, this is a register dump at what time? Originally I asked for the > > dump before and after every line in the umtrx_tx_init.sh. > > That was for Andrey. That dump was taken during the previous 945 MHz > measurement. > > These dumps are for the calibration failure, which are taken at the > following points. > > 0 > ./umtrx_lms.py --lms 1 --lms-init > 1 > ./umtrx_lms.py --lms 1 --lms-tx-enable 1 > 2 > ./umtrx_lms.py --lms 1 --pll-ref-clock 26e6 --lpf-bandwidth-code > 0x0f --lms-auto-calibration > 3 > > >> LO leakage was also recalibrated for different frequencies. > > > > How different are calibration values? I've never checked how is it > > related to the PLL frequency. > > A single value within 900 MHz. At 1900 MHz it's maybe up to 3 or 4. LO > leakage is easy to calibrate though. IQ calibration is rather tedious > - calibration values at 900 MHz are useless at 1900 MHz. > > >> For comparison, after C1 pulse is added USRP1 is 1.3/3.5 and USRP2 is > >> 1.2/3.0 when measured at 925 MHz. > > > > tip: Would be great if you push this to github just as you send e-mail :) > > I'm posting the measurement captures and the Matlab for the pulse > sequence generation. The transceiver code is pretty ugly right now. > There are many stuffing bits and zero padding added to minimize the > start / end error on the E4406. It may not even work with real phones > now. > > > PS Sylvain is waiting for a howto to run OpenBTS with UmTRX to test his > setup. > > I'll hack something together later tonight. Can he receive a tone? If > yes, then everything else is straightforward. > > Thomas > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.osmocom.org/pipermail/umtrx/attachments/20120723/97a6397d/attachment.htm>