On 9/16/2015 9:16 AM, Barry N1EU wrote:
All the serious direct sampling ham xcvrs have single band pass filters ahead of the ADC for ham band reception so that's not an issue.
Not true - the Flex-6300 has no preselectors. Even if the transceiver includes preselectors (bandpass filters), defining a second "slice receiver" on a different band causes the preselector to be bypassed. The preselector (most of which are not very "tight") only works when operations are confined to a single band. Those who live in RF quiet locations - no nearby neighbors, no MF or HF broadcast, etc. - can get away with current direct sampling SDRs just like those in quiet locations can get away with an IC-706 or 7000. The *real performance* of the direct sampling technology is equivalent to a moderate performance conventional transceiver with broadband IF panadapter. 73, ... Joe, W4TV ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
