Rigol DS 5000C, User Manual, Page: 101 / 122

RIGOL
Signal must be
centered in “X”
D
C
B A
Figure 3-6
Sin θ =A/B or C/D where θ = phase shift (in degrees) between the two signals.
From the formula above, you could get
θ = ± arcsine (A/B) or ± arcsine (C/D)
If the main axis of the ellipse is at I and III quadrant, θ  must be in the range of (0~
π
/2) or (3
π
/2~2
π
). If the main axis is at I and III quadrant, θ  must be in the range
of (
π
/2~
π
) or (
π
~3
π
/2).
Copyright 2004 Rigol Electronic
3-9
User Manual for DS5000 Series