Hello, I just pulled the trigger few minutes ago on a 8563A on eBay, which was sold as in "working condition", which conforted me in shelling out a quite big amount of money for my pocket.
After a few moments I noticed that the pics in the AD was showing an error which I thoughts was something trivial, but according to the service manual it seems not like it :
ERR 334 "LO AMPL"I then made a search on this board and noticed that another user ( "1Ghz" ) had the same error and fixed the problem by....replacing the YTO (YIG oscillator) !!
Now, 1Ghz was reporting the SA as "not working, while the seller for my unit was reporting it as in "working condition"....
I'm confused...and since I payed ( with overseas shipping and custom fees ) almost 3000 USD, I'm rather scared, since I'm really not skilled enough to troubleshoot or repair it.
Can someone ( urgently ) advice please..?
Thank you !!
Andy
P.S.: the comforting case described by the service manual "Error 334 may also be displayed if the front-panel LO OUTPUT is not terminated into 50 ohms" seems not to be the case as in the picture the LO output seems correctly terminated..