I was only changing the low band module, because I got one from an other older generator. In the 8360 families, this low band module is the weak part. That's a very complicated part, I was trying to obtain solutions to know better how it is made inside to open and verify it but it seems it's very difficult to have some information. At the present moment, having got at least 7 different generators from this family, I already have in a corner 2 low band modules with problems. That's why I try to collect all generators from this family because we need so many parts to let them alive. That's the most recent family that we can repair and calibrate ourself without help of unobtainium software or hardware. Later products are PSG and nothing is possible without requiring Keysight services. From memory only, it was in beginning of 2018 that I was swapping this module. Once the swap made, the error disappeared, and few months later i already sold the 83630B because having replaced it with a 83640A. In this last one I replaced the VFD screen that was extremely dim. And I currently search to increase also the output power and to add an output attenuator. I don't remember what was the error on the second low band module that I needed to replace too, also for an 83630B.
