Mopar Electronic Pickup Polarity and Rotor Phase

You can likely get a used digital scope cheap on ebay if patient. I recall that people have made software which converts an audio card into a scope, which should be fast enough to capture these waveforms. I have a Fluke Scopemeter 123 which I won by sending in a card from a EE industrial magazine 20 years ago. Problem is the battery would never hold a charge, nor a replacement NiCd pack. Same thing with one we had in my department at work, so I suspect a generic software problem for the charging. I just plug my adapter into an AC outlet when I use it.