[time-nuts] Some results of PRS10 and Trimble Resolution

[Radio Engineer]

You wrote

  I still don't really understand why the PRS10 Rubidium has such a bad 2s 
Allan Deviation with a 7-hour 1PPS filter time, also considering this kind of 
nice low Phase noise. 

  My thoughts,
   
  This is a guess but I would look at the loop filter bandwidth that locks the OCXO to the Rubidium physics package.
   
  Outside the loop filter bandwidth the stability will be determined by the OCXO inside the loop filter bandwidth stability would be a function of the physics package, and at the cross over point you get noise contributions from both the OCXO and physics package, and the phase detector.  If the loop is DSP based then you can get non-linear quanitzation effects from the DSP as well all the phased detector noise, not usually a factor for average electronics but 10E-11 is not average.
   
  Regards,
   
  T.R. WR4T


 			
---------------------------------
Sneak preview the  all-new Yahoo.com. It's not radically different. Just radically better.