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Do any PNAs use a super cap?I

Question asked by drkirkby on Oct 12, 2014
Latest reply on Oct 29, 2014 by drkirkby
I have an N9938A 9 GHz 3-port Agilent PNA. Someone has said that this had a supercap,  but the service manual makes no mention of any supercap. but says that there's a lithium battery. 

It has a problem in that it will not power up properly if it has been disconnected from mains power for a while.  It goes into an infinite loop of starting for a second,  then stopping,  then powering up for a second. .

I find it hard to believe that this is due to a battery or supercap,  but maybe I am wrong.