Philip Covington wrote:
problem of the phase noise of the LO. Even QSD based SDRs which use
a DDS for the LO have worse phase noise (and spurs) than the crystal
oscillator LO in direct sampling receivers like the Perseus or QS1R.
It seems to me that high speed A/D conversion is much more difficult to
do accurately than high speed D/A conversion, so any degradation in
converting the LO to analogue is going to be more than compensated for
by that in converting a wideband signal to digital.
--
David Woolley
"The Elecraft list is a forum for the discussion of topics related to
Elecraft products and more general topics related ham radio"
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