Automatic Measurement:
Set Source A to Channel 1 and Source B to Channel 2.
Select the measurement item "Positive Phase Difference" (i.e., the phase difference between rising edges of the two channels). The oscilloscope will directly display the measurement result (e.g., -48.89° in the actual test).
If the value is negative, it indicates that CH1 lags behind CH2 in phase.
If the value is positive, it indicates that CH1 leads CH2 in phase.
Manual Measurement:
Core formula: Phase Difference = (Δt / T) × 360° (where Δt is the time interval for the two signals to reach the same state, and T is the period of a single signal).
Measure Δt: Position the cursors at the rising edge zero-crossing points of CH1 and CH2, and read the time difference (e.g., -135 µs in the actual test).
Measure T: Move the cursor to the next rising edge zero-crossing point of CH1 and read the period value (e.g., 995 µs in the actual test).
Substitute the values into the formula to calculate the phase difference (e.g., -48.85°), which closely matches the automatic measurement result (-48.89°).
