<br><font size=2 face="sans-serif">I am not up on what has been discussed
so far but I would like to toss in 2 cents worth. Maybe this is redundant.</font>
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<br><font size=2 face="sans-serif">I would recommend that any I/Q mixing
be done in DSP. There will be performance issues and cost with analog
IQ mixing. Especially with a zero IF scheme. Been there/done
that with the 95-S receiver. Low baseband IF frequency can get rid
of some of the zero IF issues but then you still have the cost of 2 mixers
and broadband analog 90 deg phase shifters. </font>
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<br><font size=2 face="sans-serif">I would recommend picking an IF and
A/D that will allow use of an LC alias filter. I don't think we need
a screaming A/D capable of converting the whole HF+6m spectrum unless the
plan is to make what Bob Sternowski called the "Digital Cat Whisker"
which is an A/D connected to an antenna. There should be a happy
medium between this and a slow converter needing a crystal filter for alias
protection or multiple conversions to a very low IF frequency.</font>
<br><font size=2 face="sans-serif">Al</font>