"gareth" wrote in message
...
What is interesting is the simplicity of the approach (ignoring the hidden
cost of the ubiquitous PC), but it ignores the multiple harmonics that
come out of DDS chips.

So, if you were to working at, say, 3MHz, how would youknow that you were
not actually analysing responses at 6, 9, 12, 15, etc MHz?

MEA CULPA !!!!!

Sorry, but I was thinking out loud about the si570 series of chips and not
about DDS chips.


Ooops!