On the attached picture, the Math1 channel displays the secondary ignition waveform of a V8 engine, with the automotive quick measure "Cylinders". (Math1 = -1*C1. The trigger source is cylinder 1, on the C2 channel.)
In a four-stroke engine, two crankshaft revolutions are required to ignite all of the cylinders, so the displayed RPM (340.8) is the half of the real engine speed.
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TOIVI
On the attached picture, the Math1 channel displays the secondary ignition waveform of a V8 engine, with the automotive quick measure "Cylinders". (Math1 = -1*C1. The trigger source is cylinder 1, on the C2 channel.)
In a four-stroke engine, two crankshaft revolutions are required to ignite all of the cylinders, so the displayed RPM (340.8) is the half of the real engine speed.
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