Hello, I have a 4424 scope. I have a few questions regarding 3 phase mains voltage measurement.
1) I understand that to measure 3 phases I will need 3 high voltage differential probes like the TA041. Can I measure a single phase (480V) with a passive 10x or 100x probe?
2) Should I have any concerns about my laptop when measuring high voltage? What kind of protection is there through the usb port? Is it isolated?