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E4991A Measurement Accuracy change information

Data sheet (Page 5 and page 7) and Operation Manual (page 245 and page 251)

Accuracy when open/short/load/low-loss capacitor calibration is performed.

1. Condition is added as shown below

  • Cal Mode: User-defined point mode
  • Point Averaging factor ≥ 8
  • Oscillator level ≥ -18dBm
  • Within ±1 ºC from the calibration temperature
  • 8Ω ≤ |Zx| ≤ 300Ω (|Zx|: Reading of impedance measurement result)

2. Figure for Q accuracy is changed as shown bellow