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Why does one trace of the oscilloscope traces have to be inverted to display the voltage and current with the correct phase relationship?
Wiki User
∙ 14y ago
One trace of the oscilloscope traces have to be inverted to display the voltage and current with the correct phase relationship because you are probably connecting to both sides of a small resistor in series with the load. The supply side shows voltage, while the load side shows voltage drop for the load. You are showing differential voltage across the resistor in the second trace and, of course, its negative.
If, however, you are using a current probe, perhaps a clamp-on ammeter, I would question if you have it connected correctly.
Wiki User
∙ 14y ago
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What is the difference between AC and DC in terms of oscilloscope?
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