This is merely a historical archive of years 2008-2021, before the migration to mailman3.
A maintained and still updated list archive can be found at https://lists.osmocom.org/hyperkitty/list/UmTRX@lists.osmocom.org/.
Thomas Tsou thomastsou at gmail.comOn Fri, Jul 20, 2012 at 5:33 PM, Andrey Sviyazov <andrey.sviyazov at fairwaves.ru> wrote: > Hi Thomas. > > First of all thank you very much. > > And of course few questions: > 1 why you use too small input signal to the analyser? I saw -120dBc/Hz @ > 1MHz offset. No reason. That's just how I had it setup at the time. > 2 do you test LO with small CP current? I went back and forth between default 0x8c and 0x93 values, which are attached for 925 and 945 MHz. > 3 I don't see now noise peak @ 30kHz. Do you change something? There is a drop in the 30 kHz peak when the frequency is at 945 MHz instead of 925. > 4 can 4406 measuring noise plot with log freq? Answered by Sylvain. > 5 what type of modulation you use now? I mean 1 sps or 2? 4 sps with corrected pulse shape. The same configuration is below 2/5 on USRP1. Thomas -------------- next part -------------- A non-text attachment was scrubbed... Name: umtrx_phs_noise_925_16_8c.PNG Type: image/png Size: 76192 bytes Desc: not available URL: <http://lists.osmocom.org/pipermail/umtrx/attachments/20120720/989ab270/attachment-0004.png> -------------- next part -------------- A non-text attachment was scrubbed... Name: umtrx_phs_noise_925_16_93.PNG Type: image/png Size: 76039 bytes Desc: not available URL: <http://lists.osmocom.org/pipermail/umtrx/attachments/20120720/989ab270/attachment-0005.png> -------------- next part -------------- A non-text attachment was scrubbed... Name: umtrx_phs_noise_945_16_8c.PNG Type: image/png Size: 76350 bytes Desc: not available URL: <http://lists.osmocom.org/pipermail/umtrx/attachments/20120720/989ab270/attachment-0006.png> -------------- next part -------------- A non-text attachment was scrubbed... Name: umtrx_phs_noise_945_16_93.PNG Type: image/png Size: 75877 bytes Desc: not available URL: <http://lists.osmocom.org/pipermail/umtrx/attachments/20120720/989ab270/attachment-0007.png>