[time-nuts] Need schoolin PPM vs E to the umth?

[Chuck Harris]

Bruce Griffiths wrote:
> Chuck
> 
> Chuck Harris wrote:
>> n3izn at aol.com wrote:
>>   
>>> So can any one bring it down a few clicks and explain the accuracy thing to this balding hippie?
>>>
>>> I'm leaning towards ham radio applications. GPSDO are rated in one way like 1 X 10 to something. Ham radios are
>>> coming with "High Stability" oscillators that are rated in ? PPM.
>>>
>>> In laymen's terms what do those numbers mean and how do they relate to each other?
>>>     
>> They convey the same information as an accuracy percentage, only they
>> allow for an easier to understand number for higher stability sources.
>>
>> For example, an oscillator that is accurate to 1%, is accurate to
>> one part in 100, or expressed in scientific notation, 1 part per 10E2.
>>
>>   
> Wrong, it should read: 1 part in 1E2.
> 1E2 is actually shorthand for 1x10^2 .

Right Bruce.  It must be fun being a pedant.  I'll bet you are
a hoot at parties.

I was writing for a person, not a fortran compiler.  My notation
was a simulation of normal scientific notation where I couldn't
specify superscripts... just as they used to do in old data sheets.

But then, you knew that.

-Chuck Harris