4 responses to “EEVblog #235 – Rubidium Frequency Standard”

• Rubi January 16th, 2012 at 03:19

  Wow

  And I thought my Lpro 101 was cheap.
  Thank you for the hint, at these prices I immeadetly had to buy one.

  I also have a Gps locked Rbidium source from Ebay, but I am not sure if that is more stable than the Lpro 101. Furthermor I do not have the equiment to test the stability. If you have any ideas how to test the stability of an oscillator it would make a great tutorial.
  Phase noise measurements would be interesting also.

  Cheers
  Michael

  Reply

• f4eru January 16th, 2012 at 09:09

  The component on the quartz could be a PTC, intended for stabilizing the XTAL in temperature. (would explain the foam).
  Or even more clever, could it be a heating rresistor for using the temperature for “pulling” the quartz as a VCXO ?

  Concerning freq references, it would be also clever to avoid the rubidium, and to lock a 10 MHz VCXO on a GPS pps output… advantage : the same uC cold also be used as a freq. meter.

  Reply

• Dominik February 5th, 2012 at 22:39

  Hi Dave,

  the acronym for crystal ovens actually is OCXO. A TCXO compensates for temperature variations while in a OCXO an oven keeps the crystal at a constant temperature.

  Cheers,
  Dominik

  Reply

• pietja April 3rd, 2012 at 04:19

  Hey Dave,

  After watching your video i bought the same FE-5680A Rubidium frequency standard and took some pictures with the thermal camera from work.

  http://dangerousprototypes.com/forum/viewtopic.php?f=2&t=3453&start=30#p35860

  Reply