Pdf Automotive Oscilloscopes Waveform Analysis =link= Info

Increase the volts-per-division setting on the oscilloscope channel.

The relatively flat horizontal section immediately following the firing line where the spark is actively burning. It should typically last between 1.0 and 2.0 milliseconds. pdf automotive oscilloscopes waveform analysis

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: An oscilloscope acts as a high-speed voltmeter, displaying rapid voltage changes on a screen. Can’t copy the link right now

┌──────────────────────────────────────────┐ │ WAVEFORM: CRANKSHAFT HALL (NORMAL) │ ├──────────────────────────────────────────┤ │ [Screenshot] │ │ Volt/div: 5V Time/div: 20ms │ │ Probe: 10x Coupling: DC │ │ │ │ • Rising edge @ TDC #1 │ │ • Missing tooth pattern: 2 long low pulses│ │ • Voltage: 0.3V (low) / 4.8V (high) │ │ │ │ FAULT INDICATORS: │ │ - Flat line = no power / ground │ │ - Slow rise = pull-up resistor issue │ │ - Extra pulses = reluctor wheel damage │ └──────────────────────────────────────────┘

These generate their own AC voltage. The waveform appears as a continuous sine wave that increases in amplitude and frequency as engine speed increases. Look for a clean, symmetrical signature with an obvious gap indicating the alignment tooth.