
RIGOL
© 2008 RIGOL Technologies, Inc.
User’s Guide for VS5000 Series
3-7
Figure 3-6
Instruction of the Ellipse Method
Sin
θ
= 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 (3
π
/2~2
π
) 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
~3
π
/2).
A
B
C
D
Signal must be
centered in X
Содержание VS5000 Series
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