[time-nuts] Scopes and 1 PPS signals?
alan.melia at btinternet.com
Tue Oct 23 18:23:04 EDT 2007
I presume it has a calibrated delayed TB how about using that ??
----- Original Message -----
From: "Brooke Clarke" <brooke at pacific.net>
To: "Discussion of precise time and frequency measurement"
<time-nuts at febo.com>
Sent: Tuesday, October 23, 2007 11:05 PM
Subject: [time-nuts] Scopes and 1 PPS signals?
> While trying to figure out the O-1814 Rb source I found a 1 PPS signal
> less than 10 us wide. But using an HP 54501A DSO it's almost impossible
> 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
> 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
> don't cost an arm and leg?
> Have Fun,
> Brooke Clarke
> http://www.prc68.com/I/WebCam2.shtml 24/7 Sky-Weather-Astronomy Cam
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