[time-nuts] Papers on timing for lunar laser ranging
Hal Murray
hmurray at megapathdsl.net
Fri Jul 7 18:14:08 EDT 2017
kb8tq at n1k.org said:
> Consider that in 1974, I could buy a nice new car for less than what a
> decent packaged 16 bit DAC cost. Go back into the 1960’s and you are up
> into the “several new cars” range. Even for NASA projects cost did make it
> into the equation ….
When was the first GPSDO shipped as a commercial product?
There is an interesting tradeoff in GPSDO design. With a specific DAC, you
can get finer steps if you reduce the tuning range. Has anybody built one
with a reduced range and a knob on the side to adjust the center point of
that range? You would have to adjust that knob occasionally as the crystal
you are tuning drifted.
--
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