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Upgrading Counter 53220A to Option 010 Ultra High-stability OCXO Timebase?
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TheSteve:

--- Quote from: swixo on March 07, 2018, 03:17:36 am ---Seems like a lot of drift, doesn't it?

--- End quote ---

Not at all from what I can tell. The specs of the factory unit gives +- 50 ppb per year and another +-50 ppb from cal. That would be +- 1 Hz. Now this is only half a year but the error is only 0.05 Hz - seems pretty darn good to me.
swixo:
Fair.

But when your unit can show 15 digits, it seems like a lot.  I am looking at this OCXO:

http://www.morion-us.com/catalog_pdf/mv291.pdf

The ULN version is 8E-13 short term.  Imagine THAT in your counter.  This
unit appears to be able to fit in the spot for the OCXO, and will fit under the
cover.  I have another Morion OXCO, and it clocks in the E-12 all the time.

s
TheSteve:
In my case it is all just for fun, my entire lab is locked to the same reference source(GPSDO or Rb.)
swixo:
All of this is just for fun!  I lock to an SRS FS740, super stable. 

Also want the built in oscillator to be good!
EE-digger:
Good thread.  I have a 53132A with a Ebay - Polish reference osc. and Rb lab reference for now.

I'm disturbed by Agilent / KS no clean flux residue.  I hope our scopes aren't full of that stuff.  I don't trust it.  Yes, it should be benign (low SIR, good ROSE numbers) but it also acts as a "gatherer" for dust, dirt, stray solder bits (ok, this can be good  ;D).
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