[time-nuts] Scopes and 1 PPS signals?

Brooke Clarke brooke at pacific.net
Tue Oct 23 18:05:59 EDT 2007


Hi:

While trying to figure out the O-1814 Rb source I found a 1 PPS signal that's 
less than 10 us wide.  But using an HP 54501A DSO it's almost impossible to 
determine the period.  http://www.prc68.com/I/O1814.shtml

If the display is 1,000 dots wide:
at 2 us/sq the trace takes up about 4.5 squares or 450 dots,
at 200 us/sq the trace takes up about 0.045 squares or 4 dots but the second 
pulse is way off screen.  At slower sweep speeds you can't see the pulse.

Are there scopes that allow the period of a narrow pulse to be measured that 
don't cost an arm and leg?

-- 
Have Fun,

Brooke Clarke
http://www.PRC68.com
http://www.precisionclock.com
http://www.prc68.com/I/WebCam2.shtml 24/7 Sky-Weather-Astronomy Cam



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