[time-nuts] DMTD mixer question

[Bruce Griffiths]

pablo alvarez wrote:
> Hi,
>
> Perhaps the most apropiate solution for the time-nuts world is to use
> an standard development kit and add a custom mezzanine with the extra
> required logic.
>
> Unfortunately the one I have in my lab is based on a Virtex5 fpga
> which is rather expensive, but one can find excelent solutions for
> 200$
> For example:
> http://www.xilinx.com/products/devkits/HW-SPAR3AN-SK-UNI-G.htm
>
> The mezaninne card would contain SMA connectors,  an array of ECL
> registers and the PLL that should generate the reference frequency.
>
> In the FPGA we will just do the PLL control, counting and external
> world interface (probably the simplest is to go for the good old
> rs232).
> In principle I will do all the code in VHDL so you will not have any
> problem in porting it to any device.
>
> Cheers
>
> pablo
>
>   
Pablo

At least a couple of us have the Spartan 3E board.
Digilent also have some inexpensive boards that should suffice.

Bruce