10 | Keysight | E4990A Impedance Analyzer 20 Hz to 10/20/30/50/120 MHz - Data Sheet
Measurement Accuracy
Conditions of accuracy
Temperature
Four-terminal pair port of the
E4990A’s front panel
23 ± 5 °C
Beyond 23 ± 5 °C, the measurement accuracy is twice as bad as described.
Measurement terminal of the
16048G or 16048H
Within ± 5 °C from the adapter setup temperature. Measurement accuracy applies when the adapter setup is
performed at 23 ± 5 °C. When the adapter setup is performed beyond 23 ± 5 °C, the measurement accuracy is
twice as bad as described.
7-mm port of the 42942A
terminal adapter
Within ± 5 °C from the adapter setup temperature. Measurement accuracy applies when the adapter setup is
performed at 23 ± 5 °C. When the adapter setup is performed beyond 23 ± 5 °C, the measurement accuracy is
twice as bad as described.
Test port of the 42941A
impedance probe
Within ± 5 °C from the adapter setup temperature. Measurement accuracy applies when the adapter setup is
performed at 23 ± 5 °C. When the adapter setup is performed beyond 23 ± 5 °C, the measurement accuracy is
twice as bad as described.
Measurement accuracy
|Z|, |Y| accuracy
θ accuracy
± E [%] (see equation 1 on page 11, Equation 2 on page 14, equation 3 on page 17)
± E/100 [rad]
L, C, X, B accuracy
at Dx ≤ 0.1
± E [%]
at Dx > 0.1
± E × 1 + D2x [%]
R accuracy
at Dx ≤ 0.1 (Qx ≥ 10)
E
Rp: ±
[%]
D
E/100
x
Rs: ± E/Dx [%]
at 0.1 < Dx < 10
(0.1 < Qx < 10)
1 + D2x
1 + D2x
Rp: ± E ×
Dx
[%]
E
1 + D2x
Rs: ± E ×
[%]
×
Dx
100
,
at Dx ≥ 10 (Qx ≤ 0.1)
D accuracy
± E [%]
at Dx ≤ 0.1
± E/100
at 0.1 < Dx ≤ 1
± E × (1 + Dx)/100
Q accuracy (at Qx × Da < 1)
at Qx ≤ 10 (Dx ≥ 0.1)
Q2x × E (1 + Dx )/100
1 Qx × E (1 + Dx )/100
±
±
Q2x × E/100
1 Qx × E/100
at Qx > 10 (Dx < 0.1)
G accuracy
at Dx > 0.1
1 + D2x
± E ×
[%]
Dx
at Dx ≤ 0.1
± E/Dx [%]
NOTE
Dx : measurement value of D.
Qx : measurement value of Q.
Da : measurement accuracy of D.
Under an AC magnetic field, the following equation is applied to the measurement accuracy.
E × ( 1 + B × ( 5 + 500/Vmv )) [%] (Typical)
B
: Magnetic flux density [Gauss]
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