Rick, The FLEX-6000 Signature Series radios can receive and demodulate signals INSIDE the final filter for example as large as S9 +80 dB (+8 dBm or 6 mW) with the 20m preselector on, preamps off and attenuator off. I think you will find that most analog multi-conversion architecture radios "fold" when trying to directly receive signals at that level. Further, in two tone IMD3 testing under the same conditions, IP3 measures > +45 dBm INSIDE the final filter. You may want to compare that with an analog roofing filter based receiver inside the roofing filter.
Regards, Gerald Gerald Youngblood, K5SDR President and CEO FlexRadio Systems(TM) Email: [email protected] Web: www.flexradio.com <http://www.flex-radio.com/> Tune In Excitement (TM) On Thu, Mar 14, 2013 at 10:36 AM, Rick McClelland, AA5S <[email protected] > wrote: > I've noticed comments elsewhere that perhaps there is an issue with limited > blocking dynamic range on direct conversion receivers such as the upcoming > Flex6700 series. Can anyone make a comment regarding observed or expected > performance of the Flex6700 in this regard? > > -- > Rick McClelland, AA5S > Fort Collins, CO > _______________________________________________ > Flexedge mailing list > [email protected] > http://mail.flex-radio.biz/mailman/listinfo/flexedge_flex-radio.biz > This is the FlexRadio Systems e-mail Reflector called FlexEdge. It is > used for posting topics related to SDR software innovation and other > technical SDR topics. > _______________________________________________ Flexedge mailing list [email protected] http://mail.flex-radio.biz/mailman/listinfo/flexedge_flex-radio.biz This is the FlexRadio Systems e-mail Reflector called FlexEdge. It is used for posting topics related to SDR software innovation and other technical SDR topics.
