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Andrey Sviyazov andrey.sviyazov at fairwaves.ruAlexander, I already explained it in preview mail. Best regards, Andrey Sviyazov. (Sent from my mobile client) 25.07.2012 8:47 пользователь "Alexander Chemeris" < alexander.chemeris at gmail.com> написал: > Hi Andrey, > > Could you also describe to Thomas and Sylvain what to do with C45 and > L6? I guess that's a required step before they do any other > measurements. > > And please, add this issue to the issue tracker. > > On Wed, Jul 25, 2012 at 1:56 AM, Andrey Sviyazov > <andrey.sviyazov at fairwaves.ru> wrote: > > Hi Thomas. > > > > Could you please make test again for LO integral phase noise and > modulation > > accuracy with PLL loop filter 100kHz and ICP=0.4mA (or above), as Srdjan > > suggested us. > > I've assembled 100kHz loop filter with the next components: > > C82 = 100pF, C83=1500pF, C84=33pF, R106=2.2k, R109=3.3k. > > To get good noises replace choke L6 by capacitor 10nF..22nF and remove > C45. > > > > I ask you because I have to send final BOM as soon as possible to avoid > > delay of UmTRXv2 production due to changes for improvements. > > > > Best regards, > > Andrey Sviyazov. > > P.S. Pictures attached just to be sure. > > > > > > 2012/7/23 Andrey Sviyazov <andrey.sviyazov at fairwaves.ru> > >> > >> > >> > > Perhaps this is a silly question, but how do I calibrate the clock? > or > >> > > use an external reference signal? > >> > > >> > Andrey Sviyazov - does ClockIn works as external input in UmTRXv1? > >> > >> Yes, 5V cmos level required or smaller with DC offset to get 2.5V > >> symmetry. > >> Turn switches to MHz and slave positions. > >> > >> Best regards, > >> Andrey Sviyazov. > >> (Sent from my mobile client) > > > > > > > > -- > Regards, > Alexander Chemeris. > CEO, Fairwaves LLC / ООО УмРадио > http://fairwaves.ru > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.osmocom.org/pipermail/umtrx/attachments/20120725/ffb9ff1b/attachment.htm>