DC Offset vs temperature

Alexander Chemeris alexander.chemeris at gmail.com
Thu Jul 26 05:03:36 UTC 2012


Hi all,

Thomas has discovered that DC offset calibration for LMS is drifting a
lot with temperature changes and this has detrimental effect on the
modulation accuracy:
http://code.google.com/p/umtrx/issues/detail?id=31

One solution proposed by Sylvain is to tune modulation a bit higher
using digital modulation, which should be straightforward with UHD
which has digital mixer in FPGA.

But I wonder what is a recommended solution for this temperature
compensation for LMS in general. Srdjan, could you comment on this?

-- 
Regards,
Alexander Chemeris.
CEO, Fairwaves LLC / ООО УмРадио
http://fairwaves.ru




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