Capacitive Coupling; Light - Keysight B2980B Series User Manual

Capacitive Coupling

Capacitive coupling between the different potential will cause the noise current
when the applied voltage is changed or when the capacitance is changed.
It is important to apply shielding for eliminating the capacitive couple with voltage
fluctuation and to prevent vibration for blocking the change of the coupling
capacitance.

Light

In some devices such as diode and transistor, electron-hole pairs generated by
light can create currents which negatively impact low current measurements.
Current caused by light is unstable and slow to change. It is important to apply
shielding for cutting off the light and to prevent reflection inside the shielding.
Keysight B2980B User's Guide, Edition 1
dV dC
I = C + V
dt dt
Change of
applied
voltage
Time
Time
A
How to Perform Measurement
Measurement Considerations
Vibration
Time
Time
A
Vibration
Dielectric
absorption
with Dielectric
Time
Time
A
Dielectric
129