[Ground-station] FMC-Ultra96 adapter board proposal

[Michelle Thompson]

Updated proposal, please review!

https://github.com/phase4ground/DVB-receiver/wiki/Proposal:-Open-Research-Institute-to-build-a-board-for-Phase-4-Ground

-Michelle W5NYV



On Thu, Jun 28, 2018 at 4:05 PM, Michelle Thompson <
mountain.michelle at gmail.com> wrote:

> Comment and critique and double-checking welcome and encouraged.
>
> This adaptor board was discussed in Slack starting in May 2018. I have
> collected the links and the definitions, but this writeup needs careful
> checking before we engage in layout efforts, in order to avoid mistakes.
>
> -=-=-=-=-=-=-=-=-=-=-=-=-=
>
> Proposal:
>
> Open Research Institute to build a board for Phase 4 Ground. This is a
> mezzanine according to the 96Boards standard.
>
> https://github.com/96boards/mezzanine-community/blob/master/CONTRIBUTE.md
>
> The function of the board is an adapter between the Ultra96 development
> board...
>
> https://www.avnet.com/opasdata/d120001/medias/docus/
> 187/AES-ULTRA96-G_2018-03-19.pdf#%5B%7B%22num%22%3A37%2C%
> 22gen%22%3A0%7D%2C%7B%22name%22%3A%22Fit%22%7D%5D
>
> ...and FMC daughter cards.
>
> The standard for FMC is described here:
>
> https://www.samtec.com/standards/vita/fmc
>
> Specifically, we want to enable the Ultra96 to talk to the AD-FMCOMMS4-EBZ
>
> https://wiki.analog.com/resources/eval/user-guides/ad-
> fmcomms4-ebz/hardware
>
> Schematic of the connector here:
>
> https://wiki.analog.com/_media/resources/eval/user-guides/ad-fmcomms1-ebz/
> fmcomms1_revc_sch.pdf#page=12
>
> Layout of differential pairs needs to ensure that the lines are equal
> length.
>
> Initial discussions with 96Boards indicated no one else is working on this
> and that the effort would be welcome and appreciated.
>
> We have a volunteer with time to take a crack at the layout next week.
>
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