Fig 2-9 Waveform Example: Generate Unstable Oscillation - Prodigit 34000A Series Operation Manual

Current △I
Voltage at Load Input Terminal
When the Voltage drops under minimum operating
voltage, the electronic load may generate unstable

Fig 2-9 Waveform example: Generate unstable oscillation

You must be careful especially when the slew rate setting is high or switching is performed using
Large currents through parallel operation.
To prevent problems, connect the 34000A series and the equipment under test using the shortest
Twisted Wire possible to keep the voltage caused by inductance between the minimum operating
Voltage and the maximum input voltage range or set a low slew rate.
If the high-speed response operation is not required, decrease the slew rate setting.
In such settings, the value of DI /DT will be decreased, accordingly the generated voltage will be
Reduced even the inductance of load wiring can not be reduced.
In the case of DC operation also, the phase delay of the current may cause instabil-ity in the 34000A
Series Control inducing oscillation. In this case also, connect the 34000A series and the equipment
Under test using the shortest twisted wire possible.
△T
Minimum operating Voltage
CH1=Imonitor
CH2=Power Supply output Voltage (x10)
CH3= LOAD Input Voltage (x10)
34000A Series Operation Manual 37