[time-nuts] DDS in GPSDO design?

Bruce Griffiths bruce.griffiths at xtra.co.nz
Mon May 28 08:41:08 UTC 2012


Poul-Henning Kamp wrote:
> In message<4FC2A5E9.7050304 at partiallystapled.com>, Michael Tharp writes:
>
>    
>> Does anyone have any comments or experience with DDS-based frequency
>> references?
>>      
> I belive that is basically how the optional "output generator" works for
> hydrogen masers.
>
>    
The Symmetricom AOG 110 has a very small fractional frequency adjustment 
range of 5E-8 albeit with a resolution of 1E-19.
Thus it is relatively simple to ensure that the effect of any resisual 
DDS phase truncation and other spurs is very small.

Bruce



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