[time-nuts] T-Bolt output harmonics

Magnus Danielson magnus at rubidium.dyndns.org
Sun Aug 12 19:56:56 EDT 2012


On 08/13/2012 01:24 AM, John Miles wrote:
>>> 10MHz   +9dbm
>>> 20MHz    -50dbm
>>> 30MHz   -37dbm
>>> no obvious higher harmonics
>>> broad noise envelope at 60>  75MHz @  -60dbm peak
>>>
>>> Are these results typical or might I have an adjustment or other problem?
>
> I seem to have missed the part where it's explained why anyone cares about
> the harmonic content of their 10 MHz source...?  Don't worry about it, it's
> pretty much irrelevant.  Harmonic filters can only hurt phase stability.

With an asymmetric filter, you get AM to PM conversion. Over-reacting to 
overtones can get you into a place you don't want to be.

Cheers,
Magnus




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