[time-nuts] NCOCXO anyone?

Ole Petter Rønningen opronningen at gmail.com
Fri Jul 22 04:10:47 EDT 2016


SpectraDynamics HROG 5/10

http://www.spectradynamics.com/products/hrog-10-high-resolution-phase-and-frequency-offset-generator/

On 22. jul. 2016, at 09.49, Anders Wallin <anders.e.e.wallin at gmail.com> wrote:

>> richard at karlquist.com said:
>>> Also in 1996, phase microsteppers were already legacy technology and
>> didn't
>>> have a good reputation for spectral purity.  Another non-panacea.
>> 
>> What is a phase microstepper and/or how does it compare to a DDS?
>> 
>> (Google gets lots of hits, but they all refer to motors.)
> 
> 
> H-maser aging is typically compensated by something like
> spectratime femto-stepper
> http://www.spectratime.com/products/itest/clock-instruments/FemtoStepper/
> microsemi AOG
> http://www.microsemi.com/products/timing-synchronization-systems/time-frequency-references/active-hydrogen-maser/aog-110
> (there are probably others, please post if you know about them!)
> 
> afaik they contain a OCXO/BVA that is steered based on a DMTD measurement
> against the input reference.
> 
> 
> AW
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