Hi Ken,
It's �a hybrid. The local quadrature oscillator is digitally generated using a microprocessor and a dual DAC. The rest of it is analog: input gain stage, phase difference networks, multipliers, etc.
I just got back the 'final' proto (always a caveat until I know everything works) and it's being populated today. There are almost 300 components, and over 90% is tiny surface mount stuff. Soldering these protos is a P.I.T.A. I hope this board checks out ok so I can start the run.
Tony
On Tue, 21 Oct 2003 15:42:01 +0000, elhardt@... wrote:
>�Tony Karavidas writes:
>>>�there is a header on each UEG, Frequency shifter, etc that can
>>>�be used for
>>>
>�firmware updating.<<
>
>
>�Now I'm confused. �Is the frequency shifting being done in the
>�analog or digital domain? �Thought it was analog up until I read
>�this.
>
>�-Elhardt
>
>
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