[time-nuts] Papers on timing for lunar laser ranging
kb8tq at n1k.org
Fri Jul 7 19:20:13 EDT 2017
Not in a commercial system ….
> On Jul 7, 2017, at 6:14 PM, Hal Murray <hmurray at megapathdsl.net> wrote:
> 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.
> These are my opinions. I hate spam.
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