[time-nuts] FE-5680A Results so far

mike cook michael.cook at sfr.fr
Thu Dec 29 02:14:54 EST 2011

Just got my cheapo 5680A.  It was accompanied by a little teddy bear 
clutching a L7805CV !

Got a couple of questions.

1) What is the expected 10MHz peak to peak voltage.  FEI doc seems to 
indicate 0,5V but I am getting only 200mv.
2) What is the sensitivity to 15V input level. I am only measuring 
14,722 (stable) on Pin1.
3) Could this low input voltage affect output voltage?

The box locks after a couple of minutes but my TDS 210 is showing a very 
jittery  ( 9,98-10,02 MHz ) but well formed sine wave for 8 hours of 
being powered on.  Could this also be an artefact of low main power?


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