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A maintained and still updated list archive can be found at https://lists.osmocom.org/hyperkitty/list/UmTRX@lists.osmocom.org/.
Alexander Chemeris alexander.chemeris at gmail.comHi all, Schematics are updated: https://github.com/chemeris/umtrx-schematics/commit/e4f71edbe96d4673ce87e6db982c0346a9b6e412 Huge thanks to everyone for digging into the issue! On Mon, Jul 30, 2012 at 12:07 PM, Andrey Sviyazov <andrey.sviyazov at fairwaves.ru> wrote: > Hi Thomas. > > Thank you very much for good news. > Sylvain and everybody who discussed, thanks a lot. > Seems, now I could finalize new revison of the BOM. > > Best regards, > Andrey Sviyazov. > > > > 2012/7/30 Thomas Tsou <ttsou at vt.edu> >> >> Hi Andrey, >> >> Parts arrived yesterday and I made modifications for the 100 kHz loop >> filter and tested today. The entire 900 band is below 1.5 / 5 with a >> good margin. >> >> http://filebox.vt.edu/users/ttsou/http/umtrx_945mhz_4.bmp >> >> The lower part of the 1800 is also below the target value. I was not >> successful at 1885 MHz, though further calibration is possible (manual >> calibration at each frequency takes a very long time). I will perform >> additional tests tomorrow. >> >> http://filebox.vt.edu/users/ttsou/http/umtrx_1825mhz_4.bmp >> http://filebox.vt.edu/users/ttsou/http/umtrx_1825mhz_noise.PNG >> >> Thomas >> >> On Wed, Jul 25, 2012 at 9:52 PM, Thomas Tsou <ttsou at vt.edu> wrote: >> > On Wed, Jul 25, 2012 at 1:41 PM, Andrey Sviyazov >> > <andrey.sviyazov at fairwaves.ru> wrote: >> >> Hi Thomas. >> >> >> >> Digikey part numbers links: >> >> C82 = 100pF, C83=1500pF, C84=33pF, R106=2.2k, R109=3.3k, L6=0.022uF. >> >> >> >> But you'll remove 100pF capasitor from position C45, so you could use >> >> it for >> >> C82. >> >> BTW, how long time required to delivering from the DigiKey? >> > >> > Thank you for the links. Parts are ordered. Digikey orders usually >> > arrives in 2 days. >> > >> > Thomas > > -- Regards, Alexander Chemeris. CEO, Fairwaves LLC / ООО УмРадио http://fairwaves.ru