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Tom Tsou tom at tsou.ccOn Fri, Jan 24, 2014 at 7:29 AM, Holger Hans Peter Freyther <holger at freyther.de> wrote: > SDRs provide the greatest flexibility but unless you have specific > RF filters in your frontend you will not pass the harmonized norms > of the European Union for GSM. I think this statement is quite dated. A calibrated USRP N200 running osmo-trx passes RF spectrum and modulation accuracy requirements of 3GPP 05.05 by very large margins and is competitive with commercial GSM equipment in this regard. Other SDR devices are also capable to varying degrees. -TT