AnsweredAssumed Answered

HP 54845A trigger mux problem

Question asked by trace on Mar 2, 2011
Latest reply on Mar 14, 2011 by trace
Hi forum,

I have bought a HP 54845A on ebay that were supposed to be in working condition, however it's not. The symptoms is that the trigger only reacts at zero crossing. The level is always zero regards of what I set it to in the software. I suspects that the problem is caused by the trigger mux.

I have seen so many posts in different forums regarding trigger problem on this scope. Someone might know how the trigger circuit is designed and can be fixed...?

Does schematics exists and can they be obtained?

I'm really on my knees to find a solution as I now have a $4500 useless scope on my desk