Post by thread:alternative to floating scope

I know this is continuing an off-topic thread, please indulge me.. Tektronix has a differential probe, the P5200, that is useful for taking floating measurements, and it is affordable. It has pretty good specs, too. A slightly less affordable solution is to get a scope that is designed to be floated. I have a Tektronix THS720 handheld scope, and all five connections(power, two scope channels, voltmeter, and RS-232 port) are isolated from each other. It's perfect for the outdoorsy nerd, I've attached it to my thigh with a bungee cord to take measurements while riding an electric recumbent trike. Using an isolation transformer is fine to prevent shock hazard, and floating your scope will usually prevent sparks from flying, but remember the ground clip on your scope is attached to a big "antenna" that will try to push around whatever you attach it to, so don't count on getting accurate measurements in all situations. A (good)differential probe and/or an isolation amplifier is the only way to take some measurements, and second best is a tiny portable scope. OK, enough self-indulgence, back to PICs. :-) Cheers, Bob