[time-nuts] DIY Frequency extension for HP Agilent 53181A, 53131A or 53181A

Mark Sims holrum at hotmail.com
Sat Feb 14 21:39:33 UTC 2009

I would HIGHLY recommend that you buy a GPS disciplined oscillator.  You can pick up a Trimble Thunderbolt on Ebay for less than $150 from the Chinese sellers (or $300 ready to go with power supply and antenna which you can buy for a lot less).  The frequency output of these can rival that of a cesium beam unit.  You will need one to set the frequency of the rubidium oscillator.

I would avoid the Lucent units.  They are poorly documented,  very big,  and most cannot be made to properly lock the oscillator to the GPS signal.
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