[time-nuts] Does doubling a frequency alter the original ADEV of the frequency?

Bob Camp kb8tq at n1k.org
Sat Jul 9 19:54:34 EDT 2016


Hi

The simple answer is that most doublers that are ok for phase noise will not degrade ADEV. 
The issues with ADEV come when your doubler is out in a changing environment and your 
oscillator is not ( = it’s an OCXO). The answer to that problem is pretty simple if you have an issue …
ovenize the doubler.

Bob

> On Jul 9, 2016, at 3:48 PM, James Robbins <jsrobbins at earthlink.net> wrote:
> 
> Would doubling the frequency of a 5 MHz oscillator to 10 MHz affect (or degrade) the natural ADEV of the 5 MHz oscillator?  If so, how does it affect the original ADEV?  Is there a preferred frequency doubler circuit which would do the least harm to the ADEV of the oscillator?  The signal can be a square wave and does not need to be a sine wave.  Thanks.  Jim Robbins
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