Hey all!
Is there anyone out there with a 5340A frequency counter that can measure some voltages for me? There's a unit inside on the pre-amp assembly #1 and another on the pre-amp assembly #2 that takes +5 volts and -5 volts that generates the sampling pulses, called 5088-7005. I have one on my bench and I really don't want to blow it up, can't manage to open it, can't find any pictures on the web of how it's hooked up properly, and it has absolutely no labels on it. I'd really appreciate it if someone could figure out which terminal is the +5 and which is the -5 with a multimeter... or perhaps I've missed something in the manual. All I know from a bit of googling is that one wire is color coded red/white/black and can see what terminal it goes to, but there's no table (that I've found) that says what voltage this wire corresponds to. Maybe this is a standard HP color coding. Any ideas, folks? Thanks for checkin!