[time-nuts] Scopes and 1 PPS signals?

[Dave Brown]

But he knows the period already to parts in 10e-9 or better.  His 
email sez it's a PPS signal ex an Rb source.
Not much point in trying to measure that with a scope timebase!
So I still think he wanted to measure the  ~10uS pulse width......
<g>
DaveB, NZ

----- Original Message ----- 
From: "Didier Juges" <didier at cox.net>
To: "'Discussion of precise time and frequency measurement'" 
<time-nuts at febo.com>
Sent: Wednesday, October 24, 2007 5:27 PM
Subject: Re: [time-nuts] Scopes and 1 PPS signals?


> ); SAEximRunCond expanded to false
> Errors-To: time-nuts-bounces+tractorb=ihug.co.nz at febo.com RETRY
>
> I read this:
>
> "But using an HP 54501A DSO it's almost impossible to determine the 
> period.
> http://www.prc68.com/I/O1814.shtml"
>
> It seems he wanted to measure the period. For once, the thread 
> actually was
> about the original question :-)
>
> Didier
>
>> -----Original Message-----
>> From: time-nuts-bounces at febo.com
>> [mailto:time-nuts-bounces at febo.com] On Behalf Of Dave Brown
>> Sent: Tuesday, October 23, 2007 11:21 PM
>> To: Discussion of precise time and frequency measurement
>> Subject: Re: [time-nuts] Scopes and 1 PPS signals?
>>
>> I took Brookes original inquiry to be about measuring the
>> width of the
>> nominally 10 uS  wide PPS pulse-in which case anything that
>> alters the
>> pulse width is a no-no.  Precise and stable triggering delay to 
>> place
>> one of the pulses in the on-screen area is all  that is required.
>> DaveB, NZ
>
>
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