John Ackermann N8UR wrote:
>
> But on the other hand, having a free-running Rb that you calibrate
> against the Tbolt (or some other reference) every so often isn't a bad
> idea; it gives you a source that's independent of external factors.
>
> John
This was the road to hell for me :) I bought a Z3801A (moral equivalent
to the Trimble Thunderbolt) back in 2000. I've happily used it as my
house reference for both PPS and 10MHz for many years confident that I
have a solid timebase.
For the last several years I've been designing spectrometers for radio
telescopes and it's been convenient and sometimes essential to have a
timebase that's not too much worse than a modern radio telescope. I see
the lock light, I make a few plots, and I get a warm feeling that I know
what time it is.
http://www.mock.com/gps
I recently bought an Rb source for fun. Nominally I use it as the
timebase for my frequency counter and run everything else off of the
z3801a. Now I live in constant state of flux not really knowing what
10MHz is anymore. I need more clocks, my Rb source is amplifying my
personality quirks.
jeff
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