Inverted waveform

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AlexMpico
OneWave
OneWave
Posts: 10
Joined: Sun Jul 08, 2018 8:49 am

Inverted waveform

Post by AlexMpico »

Hi there, using 2205A with inductive clamp around secondary wire extension on secondary ig, and I've done many times. However I'm receiving an inverted waveform. Have tried turning around induction clamp. This is not a Wasted Spark system. It is Coil on Plug, Mazda2 2011, ZY 1.5L engine.
I know there is an option to Invert the Waveform. Seems a nuisance.
Any ideas as to why this engine scoping is producing an inverted waveform on all cyls??? Very puzzled. See attached .psdata as an eg ... same for single event capture.
I'm aware the 2205A is not a Auto scope ... using it as my entry and learning tool for now.
thanks
Alex
Attachments
Cyl4 Idle 20190112-0001.psdata
(1.25 MiB) Downloaded 269 times

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