Hantek DSO-3000 Series, Руководство пользователя

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Application Example
USER’S MANUAL 55
7. Apply the Ellipse Method to observe the phase difference between the two channels.
Signal in X-Y Format :
Instruction of the Ellipse Method
Sinθ = A/B or C/D , where θ = phase shift (in degrees) between the two signals.
From the formula above:
θ
= _arcsine (A/B) or _arcsine (C/D)
θ must be in the range of (0~π/2) or (3π/2~2π) if the main axis of the ellipse is between I and III
quadrant, . If the main axis is at II and IV quadrant, θ must be in the range of (π/2~π) or (π~3π/2).