08 | Keysight | E4991B Impedance Analyzer - Data Sheet
Measurement Accuracy (continued)
at –23 dBm < oscillator level ≤ 1 dBm:
(17 + 0.5 × F) [mΩ] (averaging factor ≥ 8)
(21 + 0.5 × F) [mΩ] (averaging factor ≤ 7)
at –33 dBm ≤ oscillator level < –23 dBm:
(25 + 0.5 × F) [mΩ] (averaging factor ≥ 8)
(50 + 0.5 × F) [mΩ] (averaging factor ≤ 7)
at –40 dBm ≤ oscillator level < –33 dBm:
(50 + 0.5 × F) [mΩ] (averaging factor ≥ 8)
(10 + 0.5 × F) [mΩ] (averaging factor ≤ 7)
Yo = (Specification values of “point averaging factor ≥ 8” is applied only when point
averaging factors at both calibration and measurement are 8 or greater.)
at –17 dBm ≤ oscillator level ≤ 1 dBm:
(1.7 + 0.1 × F) [μS] (averaging factor ≥ 8)
(4.0 + 0.1 × F) [μS] (averaging factor ≤ 7)
at –23 dBm ≤ oscillator level < –17 dBm:
(4.0 + 0.1 × F) [μS] (averaging factor ≥ 8)
(8.0 + 0.1 × F) [μS] (averaging factor ≤ 7)
at –33 dBm ≤ oscillator level < –23 dBm:
(10.0 + 0.1 × F) [μS] (averaging factor ≥ 8)
(30.0 + 0.1 × F) [μS] (averaging factor ≤ 7)
at –40 dBm ≤ oscillator level < –33 dBm:
(20.0 + 0.1 × F) [μS] (averaging factor ≥ 8)
(60.0 + 0.1 × F) [μS] (averaging factor ≤ 7)
Calculated impedance measurement accuracy
Figure 1. |Z|, |Y| Measurement accuracy when open/short/load calibration
is performed. Oscillator level = –13 dBm, –3 dBm. Point averaging factor
≥ 8 within ± 5 °C from the calibration temperature.
Figure 2. |Z|, |Y| Measurement accuracy when open/short/load calibration is
performed. Oscillator level –13 dBm, –3 dBm. Point averaging factor ≤ 7 within
± 5 °C from the calibration temperature.
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