Photo 1 is the high side gate drive
Photo 2 is the low side gate drive
Trace is aligned in the reference line before measuring.
If I understand this principe correctly, this differential measurement is done to check if the spikes on top of the PWM is real or a inductive/magnetic measurement interference. Is this right? Could you confirm this please?
Photo 2 is the low side gate drive
Trace is aligned in the reference line before measuring.
If I understand this principe correctly, this differential measurement is done to check if the spikes on top of the PWM is real or a inductive/magnetic measurement interference. Is this right? Could you confirm this please?
Attachments
Double-check your scope for these settings.
Input set to add
Both channels set to DC coupling.
Both channels set to 'cal'.
Both vertical amps set to the same voltage
Ch2 input set to invert
Bandwidth limited (works best for most measurements in car amps)
Trace aligned to the reference line on the scope's display
Input set to add
Both channels set to DC coupling.
Both channels set to 'cal'.
Both vertical amps set to the same voltage
Ch2 input set to invert
Bandwidth limited (works best for most measurements in car amps)
Trace aligned to the reference line on the scope's display
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- Audison SR1Dk output driver card, no High-side output