My 53131A sometimes throws up the "Interp Fail" message, although 99% of the time it works well, and passes the power on test.? I can find nothing relevant to this in the Service manual except a brief note about calibrating the Interpolator over HPIB, and another mention that suggests replacing the mother board, which I am not inclined to do.? Has anyone seen this and if so, what was the solution?
Thanks,
Dan
ac6ao
