[time-nuts] Scopes and 1 PPS signals?
brooke at pacific.net
Tue Oct 23 19:20:57 EDT 2007
I tried. At 100 ms/sq the second pulse would be just off screen to the right.
At 200 ms/sq the second pulse should be at center screen. Using the window
function the window time base can be no more than 10X faster than the main
trace which would be 20 ms/sq, way too slow to see the pulse.
http://www.prc68.com/I/WebCam2.shtml 24/7 Sky-Weather-Astronomy Cam
Alan Melia wrote:
> ); SAEximRunCond expanded to false
> Errors-To: time-nuts-bounces+brooke=pacific.net at febo.com RETRY
> I presume it has a calibrated delayed TB how about using that ??
> Alan G3NYK
> ----- 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?
>>http://www.prc68.com/I/WebCam2.shtml 24/7 Sky-Weather-Astronomy Cam
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