[Elecraft] Analog vs. Digital Front Ends

[Joe Subich, W4TV]

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