Greetings.
It has been a long time since i got in here..pardon me for the lengthy delay.
Work plus complying to the GREAT ISO17025 takes more than most of my days but still i am dillusioned. But what i do know is that i have been learning quite a few mentally draining, cumbersome facts and figures.
But i guess you guys also feel and undergo the same issues as well,huh?
Anyways, i do have something in my mind in which i would require some help from the distinguished people in this forum.
I need to know how exactly to perform a calibration on frequency source/measurement device and how does the uncertainty calculated using the ALLAN DEVIATION method.
I am a tad bit confused here and how does a GPS DO help to reduce the uncertainty?
Any guide/template or facts/examples would be more than helpful here.
Appreciate the help

Rgds
Rubenn

Suggestions anyone?

Just a little curious.....

Why use the Allan Deviation, say as opposed to the more in vogue Monte Carlo analysis? They both deal with the reliability of the device, but the Allan also addresses noise but with diminishing returns at about -11 or -12.....

In any case, a GPS is based on cesium time standards.....these devices once stable over a period of time can get to about 1x10 to -13.....so a GPS-sync'd may be able to get to about -11 or maybe -12.....depending on what you are working with.....

Hope this helps.