122
D
C
A
B
Picture 3-3
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 and quadrant ,
Ⅰ
Ⅲ
θ
must be in the range of (0
～
π
/2) or (3
π
/2
～
2
π
).if the main axis is at and quadrant,
θ
Ⅰ
Ⅲ
must be in the range of
(
π
/2
～
π
) or (
π
～
3
π
/2).
The signal must be medical
horizontal
Summary of Contents for SDS1000 Series
Page 146: ...138 Coupling DC...
