[time-nuts] Home built cesium clocks???
Poul-Henning Kamp
phk at phk.freebsd.dk
Sun Jun 29 10:22:04 UTC 2008
In message <7.0.1.0.1.20080629120421.01ebecc8 at tapko.de>, Predrag Dukic writes:
>
>
>Bruce,
>
>I did my homework and collected everything from the internet I could
>get. I have this one too.
>
>If I go optical way, I still need 9+GHz electrical source, so I will
>first recreate electronics. Using off the shelf DDS chips, or using FPGA.
I would probably start out trying to get the thing to work, then
optimize later. For instance, I would start with an off-eBay HP
synthesizer, rather than fight with GHz frequency PCB layout.
>No doubt, I will have a lot of fun with the project.
Ohh, absolutely.
Have you visited the Science Museum in London ? They have the original
Cesium beam frequency standard, spending a couple of hours with that
would probably help you determine what/where the really hard bits are.
Also, consider paying PTB a visit, they can probably be persuaded give
your a tour of their designs.
--
Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG | TCP/IP since RFC 956
FreeBSD committer | BSD since 4.3-tahoe
Never attribute to malice what can adequately be explained by incompetence.
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