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Thomas Tsou ttsou at vt.eduHi 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