[hpsdr] Mercury

[Philip Covington]

This message was actually meant for Phil H.  I was too quick on the
draw and ended up posting it to HPSDR list also.  Without knowing the
context of what Phil and I have been discussing over the last month, I
know that it is hard to follow.  We will have a schematic up for
comment soon and I hope that will clear some things up.

73 de Phil N8VB


On 9/23/06, Philip Covington <p.covington at gmail.com> wrote:
> Hi Phil,
>
> Mercury:
> If we go with the AD6636, by using a couple of 74LVC16374
> <http://www.nxp.com/pip/74LVC16374ADL.html>
> 16 bit D FFs, we can either route the ADC input to the AD6636 or
> straight to the FPGA on the Mercury board.  That way we can support
> radio mode with the AD6636 and spec/oscope mode in the FPGA.  To use
> the board just as a scope or spectrum analyzer the AD6636 would not
> have to be populated on the board.  It would also allow
> experimentation with DDC in the FPGA with a fallback to the AD6636
> otherwise.
>
> The IDT72V293 <http://www.idt.com/?genID=72V293> looks like a good
> candidate for a FIFO.  I think we'd be better off with an external
> FIFO than just SRAM.  What do you think?
>
> Do you have recommendations for the rf front end and filters or does
> that need to wait until the first alpha board?
>
> 73 de Phil N8VB
>

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