35 | Keysight | E4980A Precision LCR Meter 20 Hz to 2 MHz, E4980AL Precision LCR Meter 20 Hz to 300 kHz/500 kHz/1 MHz – Data Sheet
DC bias test signal current (1.5 V/2.0 V): Output current: Max. 20 mA
Option 001 (Power and DC Bias enhance):
DC bias voltage: DC bias voltage applied to DUT is given as:
Equation 18.
Vdut = Vb – 100 × Ib
Vdut [V] DC bias voltage
Vb [V] DC bias setting voltage
Ib [A]
DC bias current: DC bias current applied to DUT is given as:
Equation 19. Idut = Vb/(100 + Rdc)
DC bias current
Idut [A] DC bias current
Vb [V] DC bias setting current
Rdc [Ω] DUT’s DC resistance
Maximum DC bias current
Table 64. Maximum DC bias current when the normal measurement can be performed.
Impedance Bias current isolation
range [Ω]
ON
OFF
Test signal voltage ≤ 2 Vrms
Test signal voltage > 2 Vrms
0.1
Auto range mode: 20 mA
100 mA
100 mA
100 mA
100 mA
100 mA
20 mA
20 mA
2 mA
100 mA
1
20 mA
20 mA
20 mA
2 mA
Hold range mode:
its values for
the range.
10
100
300
1 k
2 mA
3 k
200 µA
200 µA
20 µA
20 µA
10 k
30 k
100 k
2 mA
200 µA
When DC bias is applied to DUT
When DC bias is applied to the DUT, add the following value to the absolute accuracy Ab.
Table 65. Only when Fm < 10 kHz and |Vdc| > 5 V
SHORT
MED, LONG
0.05% × (100 mV/Vs) × (1 + √(100/Fm))
0.01% × (100 mV/Vs) × (1 + √(100/Fm))
Fm [Hz] Test frequency
Vs [V]
Test signal voltage
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