11 | Keysight | E4990A Impedance Analyzer 20 Hz to 10/20/30/50/120 MHz - Data Sheet
Impedance measurement accuracy at four-terminal pair port
Equation 1 shows the impedance measurement accuracy [%] at four-terminal pair port of the E4990A, or measurement port of the
16048G/16048H.
Equation 1. Impedance measurement accuracy [%] at four-terminal pair port (Typical at > 10 MHz)
Zs'
Zx
E = Ep' +
+ Yo' × Zx × 100
Where,
Ep' = Epl + Epbw + Eposc + Ep [%]
Yo' = Yol + Kbw × Kyosc × (Yodc + Yo) [S]
Zs' = Zsl + Kbw × Kzosc × Zs [Ω]
1m: 0.02 + 2 × f/100
2m: 0.02 + 3 × f/100
Epl [%]
Meas Time 5: 0
Meas Time 4: 0.06 at < 50 kHz, 0.03 at ≥ 50 kHz
Meas Time 3: 0.2 at < 50 kHz, 0.1 at ≥ 50 kHz
Meas Time 2: 0.4 at < 50 kHz, 0.2 at ≥ 50 kHz
Meas Time 1: 0.8 at < 50 kHz, 0.4 at ≥ 50 kHz
E
E
pbw [%]
Vosc > 500 mV: 0.018 × (1000/Vmv-1) + f/100
200 mV < Vosc ≤ 500 mV: 0.018 × (500/Vmv-1)
100 mV < Vosc ≤ 200 mV: 0.018 × (200/Vmv-1)
posc [%]
V
osc ≤ 100 mV: (100/Vmv-1) × (0.018 + Epbw)
20 Hz ≤ fm < 100 Hz: 0.5
100 Hz ≤ fm ≤ 800 Hz: 0.3
800 Hz < fm ≤ 1 MHz: 0.075
1 MHz < fm ≤ 15 MHz: 0.1 × f
15 MHz < fm ≤ 120 MHz: 1.5
Ep [%]
Yol [S]
Kbw
1 m (16048G): 500n × f/100
2 m (16048H): 1µ × f/100
Meas Time 5: 1
Meas Time 4: 1
Meas Time 3: 3 at ≤ 1 MHz, 4 at > 1 MHz
Meas Time 2: 4 at ≤ 1 MHz, 5 at > 1 MHz
Meas Time 1: 6 at ≤ 1 MHz, 10 at > 1 MHz
Vosc > 500 mV: 1000/Vmv
Kyosc
V
osc ≤ 500 mV: 500/Vmv
DCI range 1 mA: 0
DCI range 10 mA: 1 µ
DCI range 100 mA: 10 µ
Yodc [S]
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