[time-nuts] 10811 changing frequency when load impedance changes ?

Mark Spencer mspencer12345 at yahoo.ca
Sat Dec 25 05:54:13 UTC 2010


Seasons greetings.    

I was pleasantly surprised to find that a new to me HP 5328A had an 10811 in 
it.    (I was expecting the older OCXO..)     After leaving it running for a 
week I adjusted the frequency and while doing so I noticed that the out put 
frequency changes by a third of a hz or so if I add or remove a 50 ohm load.    
I'm measuring the frequency at the timebase output connection of the 
5328A.  Is this to be expected ?

Many thanks
Mark Spencer






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