Fine Tuning

A project log for HP5328 Counter OCXO Replacement

My HP 5328 Universal Counter OCXO failed, so I made a replacement using an off-the-shelf OCXO and this PCB

tomcircuittomcircuit 06/21/2015 at 00:010 Comments

I let the HP 5328 counter warm up for a couple of days and then tweaked in the fine tuning on the OCXO. I used my Rb standard as a reference, and got the display to settle on 10000.000 KHz after a few turns of the adjust pot. Seems to be working as anticipated.