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/.
Alexander Chemeris Alexander.Chemeris at fairwaves.ruHi Andrey, On Mon, Jul 23, 2012 at 10:44 PM, Andrey Sviyazov <andrey.sviyazov at fairwaves.ru> wrote: > Today I found why noises and spurs are really happens in UmTRXv1. Finally, we could say UmTRX is good at phase noise. > 1) Only full disabling (no power) GPS module can kill all near spurs. I wonder whether EB-570 is any better. And if EB-570 is no better - how could we protect LMS from this noise? > 2) To get good noises the next changes are required: > - replace choke L6 by capacitor 10nF..0.1uF. > - remove C45. Is it possible to apply those changes for UmTRXv2 without PCB changes? -- Regards, Alexander Chemeris. CEO, Fairwaves LLC / ООО УмРадио http://fairwaves.ru