GW Instek LCR-8000G Series User Manual
Page 23
BASIC MEASUREMENT
45
45
45
45
Quality factor (Q) and Dissipation factor (D)
Background
Both Quality factor and its reciprocal, Dissipation
factor, are used for measuring the rate of energy
dissipation relative to the measurement frequency.
•
Low energy dissipation: high Q, low D
•
High energy dissipation: low Q, high D
Type
Quality factor (Q)
Dissipation factor (D)
Display Range
0.01 ~ 9999.9
0.00001 ~ 1000
Formula
S
S
S
S
R
C
R
L
Q
ϖ
ϖ
1
=
=
P
P
P
P
R
C
L
R
ϖ
ϖ
=
=
(
)
D
1
90
tan
1
=
−
=
°
θ
S
S
S
S
R
C
L
R
D
ϖ
ϖ
=
=
P
P
P
P
G
L
C
G
ϖ
ϖ
=
=
(
)
Q
1
90
tan
=
−
=
°
θ
LCR-8000G Series User Manual
46
46
46
46
Angle (θ)
Background
The Angle (θ) measures the phase on which
Impedance (Z), Admittance (Y), Quality factor (Q),
and Dissipation factor (D) are measured.
Type
Angle (θ)
Display Range
–180° ~ +180°
Formula
jX
R
Z
S
+
=
C
j
R
L
j
R
ϖ
ϖ
−
=
+
=
(
)
D
Q
1
90
tan
1
=
−
=
°
θ
θ
cos
Z
R
S
=
θ
sin
Z
X
S
=
jB
G
Y
P
+
=
L
j
G
C
j
G
ϖ
ϖ
−
=
+
=
(
)
Q
D
1
90
tan
=
−
=
°
θ
θ
cos
Y
G
P
=
θ
sin
Y
B
P
=