Products > Test Equipment
Upgrading Counter 53220A to Option 010 Ultra High-stability OCXO Timebase?
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swixo:
The procedure is changing the TCXO for the OCXO, then removing the two
zero ohm resistors near the clock zone. 

The firmware detects that change all by itself.  Whether it is the presence of the
new part alone - or the removal of the resistors is not known.

s
TheSteve:
FYI the Vectron C4550A1-0213 I linked to above works just fine, and was cheap. I got mine from a different seller for 17 bucks though.
swixo:
Steve - Did you install one of those EBay OXCOs in an instrument?  How's the drift?
TheSteve:

--- Quote from: swixo on March 05, 2018, 01:01:15 am ---Steve - Did you install one of those EBay OXCOs in an instrument?  How's the drift?

--- End quote ---

Yes I have one in a 53230A. I haven't checked drift lately, I'll fire up the unit and see how it looks. When I also had a factory 010 here it was every bit as good. Could be a crap shoot with a used ebay sourced one I suppose.

edit:

Just fired it up and compared it to my GPSDO. I do have the standby mode selected that keeps the OCXO warm. It has been more then 6 months since the last cal from the same GPSDO.

swixo:
Seems like a lot of drift, doesn't it?
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