[time-nuts] KS-24361 Output spectrum to 100 MHz

Charles Steinmetz csteinmetz at yandex.com
Tue Dec 2 06:20:38 EST 2014

Götz wrote:

>the 10 MHz may not be dirty. The spectrum you 
>show is that of a 10 MHz rectangular wave and 
>that's what on the output from the 10 MHz 
>connector, just a (may be clean) TTL-level signal, nothing fancy.

The odd harmonics of 10MHz do indicate a 
square-ish wave.  But there is also quite a bit 
of 5MHz leakage, even harmonics of 10MHz, and +/- 
5MHz sidebands of each odd harmonic.  This rich 
harmonic structure (especially, the 5MHz 
sub-harmonic, the even harmonics, and the 
non-integer harmonics) will substantially degrade 
the phase noise of this 10MHz output.

Best regards,


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