[time-nuts] retry: PRS10 has spurious frequencies

Poul-Henning Kamp phk at phk.freebsd.dk
Wed Apr 25 16:07:33 EDT 2007


I'm going to ask a seemingly stupid question, but bear with me:

Are you sure those signals are really present on the output ?

The reason why I ask is that you are in a frequency territory where
EMI is both radiated and conducted so you have to be really careful
with your setup, grounding in particular, to make sure you do not
actually measure the PRS10 acting as an antenna.

The best way to ensure this, is to run your PRS10 off batteries,
Sealed Lead Acid for instance, and the only other connection to
the PRS10 should be the coax to the spectrum analyzer.

Poul-Henning

-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.



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