[time-nuts] Micro phase stepper

[Tom Van Baak]

> Hi Folks,
> 
> can someone please explain to me how a micro phase stepper works? Is it
> a pure digital device or does it make use of analog delay line
> techniques? What is the maximum delay and what is the delay step size?
> 
> Thanks in advance for your help
> 
> Ulrich Bangert, DF6JB

Hopefully you've now received copies of the earlier
time-nuts email about phase microsteppers.

Not digital nor delay line; the ones I've seen used
for T&F are all PLL based. Here are the specs:

Austron 2055A
    0.00001 to 9.99999 ns per step.

TST 6490A
    000001 to 999999 e-13 to e-17 per step.

Datum AOG
    1e-19 resolution, 5e-8 range.
    http://www.symmttm.com/products_pfr_AOG-110.asp

Hope that helps.

/tvb
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