[time-nuts] FE-5680A 1 pps photo

John Howell j at howell61.f9.co.uk
Thu Feb 2 18:20:03 UTC 2012


Not odd but my mistake, I took a picture on both 'scopes and the Fluke gave marginally better results, the text referred to the wrong one. Sorry for the confusion.

On 2 Feb 2012, at 16:43, David wrote:

> Odd.  Did Tektronix mark it Fluke PM3082? :)
> 
> It is nice to know that the current generation of digital cameras can
> be used for this application.  It is too bad that the image has so
> much noise.
> 
> On Thu, 2 Feb 2012 16:27:03 +0000, John Howell <j at howell61.f9.co.uk>
> wrote:
> 
>> ........and here's another photo of the pulse from one of the newer breed of FE-5680A that require the 5V.
>> Taken with a Sony Cybershot H5, 8 sec exposure, 'scope is an elderly Tektronix 2252
>> 
>> http://dl.dropbox.com/u/1690159/1PPS_1%20FE-5680E.jpg
>> 
>> On 2 Feb 2012, at 15:50, Alberto di Bene wrote:
>> 
>>> I managed to take a photo at the scope screen showing the 1 pps pulse
>>> from an old FE-5680A (the one that does not need the 5V and does not
>>> output the oscillator signal - just the 1pps).
>>> 
>>> Exposure was 30 sec, F9. The signal was barely visible with naked eye,
>>> and some jittering is present. The room of course was in complete
>>> darkness, but the reflex of the stand-by led of another instrument
>>> can be seen...
>>> 
>>> http://dl.dropbox.com/u/15089947/1pps.gif



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