[hpsdr] About the Dynamic Range of Receivers

[Ray Anderson]

Jeff, WA1HCO wrote:


>the approach of using a single QSD mixer helps a lot.  I didn't see
what >the Mercury board intends for the buffer between mixer and A/D,
but with up >to 0 dBm input level, it seems to need more than +45 dBm
OIP3 to keep up >with the A/D.

>This is a very cool project.

>jeff, wa1hco


Jeff-

I don't think the Mercury board details aren't completely worked out
yet, however I believe that there is no mixer between the antenna and
the A/D.  There may be a high OIP3 preamp in front of it, but the A/D
will directly sample at the incoming RF frequency.


73 de Ray	WB6TPU




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