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Holger Hans Peter Freyther holger at freyther.deOn Sun, Jan 26, 2014 at 06:29:00PM -0500, Tom Tsou wrote: > On 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. Ah cool. Can you point me to papers/text showing how the n-th harmonic is being removed from the spectrum? > 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. The policy of FCC vs. European Union is quite different. There are more norms that apply in Europe.