Assuming a nonlinearity, a distortion or partly clipping of only one
halfwave, would result in a massive even harmonic, as the 200Hz in the
example. From this point of view "as expected", but a different distortion
could as well result in any other even harmonic.

Peter


Am Sonntag, 18. September 2016 schrieb David C. Partridge :

> Thanks, that makes sense.  Is the PN plot much as expected, or is it
> "could do better"?
>
> Thanks again
> Dave
> -----Original Message-----
> From: time-nuts [mailto:time-nuts-boun...@febo.com <javascript:;>] On
> Behalf Of Magnus Danielson
> Sent: 18 September 2016 11:56
> To: time-nuts@febo.com <javascript:;>
> Cc: mag...@rubidium.se <javascript:;>
> Subject: Re: [time-nuts] Thunderbolt spurs on 10MHz output at 100Hz and
> 200Hz from signal.
>
> Hi,
>
> On 09/18/2016 12:26 PM, David C. Partridge wrote:
> > The local power is 50Hz, so I can understand the 100Hz spurs, but I
> > don't quite "get" where the 200Hz spurs are coming from.  Or is that
> > just BAU harmonics?
>
> Consider full-wave rectification of 50 Hz, the power consumption load on
> the capacitor after the rectifier creates an inverse sawtooth wave of
> 100 Hz, and sawtooth waveshape have both even and odd harmonics.
>
> While much of this is regulated out in the next step, some of it makes it
> though.
>
> Cheers,
> Magnus
>
> >
> >
> > Thanks
> >
> > Dave
> >
> >
> >
> > _______________________________________________
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> >
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