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Set the Output Resistance
Output resistance programming is mainly used in battery testing applications and only applies in
voltage priority mode. It is used to emulate the internal resistance of a non-ideal voltage source such
as a battery. Values are programmed in ohms. Refer to the
model-specific resistance programming ranges.
Front Panel Menu Reference
Select Output\Advanced\Resistance.
Specify an Output Resistance value. Then check the
Enable box. Then press Select.
When units are connected in parallel, the maximum output resistance is reduced.
The programmable resistance for a single unit must be divided by the total number
of paralleled units.
Set the Output Bandwidth
Voltage compensation
Voltage compensation modes let you optimize output response time with capacitive loads. The
Capacitive Load Boundary
function of DUT capacitance to allow for stable operation. The
effect that the compensation modes have on the small-signal output impedance.
0 Fast (high speed/small capacitive load) – provides the fastest programming speed and transient
response time. Best suited for resistive DUTs with low capacitance. Default frequency = 5000 Hz.
1 Medium (medium speed/medium capacitive load) – provides intermediate programming speed and
transient response time. Best suited for DUTs with higher capacitance with some trade-off in
programming speed and transient response. Default frequency = 450 Hz.
2 Slow (slow speed/large capacitive load) – is best suited for DUTs with high capacitance/low ESR
with the trade-off of slower programming speed and transient response. Default frequency = 12 Hz.
<frequency> specifies the low-pass corner frequency of a filter applied to the programming signal. The
programmed voltage is a digitized signal which passes through a first-order low pass filter where the
pole is specified in Hertz. This filter has the effect of slowing down the output with respect to changes
in the programmed voltage or current.
Specifying the low-pass corner frequency of the filter, in combination with the configurable slew
setting, allows for a trade-off between programming speed and output voltage or current overshoot.
For example, raising the filter frequency increases the programming speed and decreases the settling
time, which may result in output overshoot. Lowering the filter frequency will decrease the
programming speed and increase the settling time, which reduces any output overshoot. The effect of
Keysight RP7970 & RP7980 Series Operating and Service Guide
To select a resistance of 0.5 ohms:
VOLT:RES 0.5
To enable output resistance:
VOLT:RES:STAT ON
graphs in the Characteristics section illustrate the minimum ESR as a
4 Using the Regenerative Power System
Supplemental characteristics
SCPI Command
Output Impedance
table for the
graphs illustrate the
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