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

[Steve Rooke]

2009/1/1 Chuck Harris <cfharris at erols.com>:
> 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.

Geez, can someone get Bruce laid!
-- 
Steve Rooke - ZL3TUV & G8KVD & JAKDTTNW
Omnium finis imminet