Hello everybody,
allow me to revive this Zombie here
Since a few weeks, I'm also a happy "new HP 8510C owner".
My Setup is 8510C, 8514B, 83620A. Also got an 3650 Cal Kit from Anritsu with the data-disk.
I got the Unit as defective (it was) and have it now working again. Of course, also with my test-set, the Schaffner-filter did go off. I believe another one did bite the dust longer ago, whenever I switch the VNA on and all fans start, it smells like burned filter in the first seconds. Need to check and replace this one too.
What I was a little bit hesitant to do, is to change the clock-battery on the CPU Board (I have the feeling it is weak). If I change the battery and by accident the 3V are lost during the process, am I losing more than just the time?
HP's service-manual just says, the battery is not field-replaceable and the whole board needs to be switched. Some other Units from HP have cal-data or something, that may get lost. I would like to avoid "bricking" my Unit.
After the repair, I observed that my VNA has a significant lower dynamic-range on port #2 (please see picture), is that normal?
I also consider getting a HP 8516A-Testset to go up to 40 GHz, still searching for a good offer (but am not in a hurry). If anybody has one and is willing to sell....
Thanks a lot
Edit: Since people like teardowns, attached a picture of the 20 GHz Test-Set open.