[time-nuts] Reverse-engineering LPRO

Bob Camp lists at rtty.us
Sun Feb 17 22:34:28 EST 2013


There *must* be an alignment procedure that sets these things up. They didn't put all those test points in there just for the fun of it. I'm sure that these units would work a bit better if we knew how to tweak them back to the original alignment specs.


On Feb 16, 2013, at 6:10 PM, Magnus Danielson <magnus at rubidium.dyndns.org> wrote:

> Fellow time-nuts,
> Considering that LPROs is pretty popular, I am a bit surprised that I have not seen any major reverse-engineering effort on the LPROs. I have the self-compiled LPRO service document, which collects parts of schematics from patents, but still.
> My main reasons for asking is that I want to get a little better overview of how they work, how I can tune them up and what signals is available where. Naturally, always figuring if there is some interesting tweaks to be done.
> LRPO is just a traditional analogue rubidium, in compact format, sure, but never the less.
> I have noticed that different FPGAs have been used over time. Curious about the various jumpers and connectors in it.
> Cheers,
> Magnus
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