[time-nuts] I can't get a nice waveform from my rubidium !

Bob Camp lists at rtty.us
Thu Apr 17 06:59:00 EDT 2014


I believe that you have a problem with that probe. A broken ground is one possibility, a significant mismatch between the probe output and the scope input is another possibility. 


On Apr 17, 2014, at 1:32 AM, Claude Fender <labtf1 at yahoo.fr> wrote:

> Hello List,
> I've recently bought a Quartzlock 10A R (rubidium). Does anyone has experience with this unit? 
> My
> unit has two outputs with no options. The problem is the shape of the 
> waveform (see attachments), it's the same shape for the two outputs. 
> When I
> connect an output directly to the oscilloscope, the shape is nearly 
> "squared" and when I use a probe, the shape is nearly "sine" !
> When I send a 10 MHz signal from a generator, the waveform is a clean sine with or whithout the probe.
> So what signal should I except from this rubidium ? Or most probably, what is wrong with my use of the oscilloscope ?
> (The frequency is ok by the way (+2E-10) and I didn't open the case yet) 
> Thanks for any advice
> Claude
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