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Front Panel Menu Reference
Select Output\Advanced\Bandwidth\Current.
There is only one compensation bandwidth. Enter the pole frequency in the
Frequency field. Then press Select.
Power compensation
The power compensation provides optimized performance for battery testing.
<frequency> - specifies the low-pass corner frequency of a filter applied to the programming signal.
The bandwidth pole frequency can be specified from 5 to 100,000 Hz inclusive.
Front Panel Menu Reference
Select Output\Advanced\Bandwidth\Power\Bandwidth.
There is only one compensation bandwidth. Enter the pole
frequency in the Bandwidth Frequency field. Then press Select.
Next, set the bandwidth parameters that are used to optimize stability and response time.
<Vmin> - specifies the minimum anticipated operating voltage. The range is from 0.2% to 100% of the
model's voltage rating. If the operating voltage falls below the minimum value, the current will be
limited to POWset/VOLTmin and the status will change from "CP" to "Unreg". Setting Vmin lower than
necessary will cause the CP response time to become needlessly slow.
<Lsense> - specifies the anticipated equivalent series inductance (ESL) between the battery and the
voltage sense point. This ESL includes inductance both external and internal to the battery or load.
Setting Lsense too low results in a faster but potentially unstable response. Setting too high results in
stable operation, but it may become needlessly. The following table describes Lsense for each model.
Model
Min L
RP7971A
10.0 E-9
RP7972A
10.0 E-9
RP7973A
10.0 E-9
Note that both of these parameters are coupled. If an error message occurs, the VMIN value is not
compatible with the LSENse setting.
Front Panel Menu Reference
Select Output\Advanced\Bandwidth\Power\Parameters.
Enter the minimum anticipated voltage in the Vmin field.
Enter the equivalent series inductance in the Lsense field.
Select Apply to set the values. if the values are not compatible
they are not set. Adjust the values.
Then press Select.
Keysight RP7970 & RP7980 Series Operating and Service Guide
Default L
Max L
62.5E-6
0.1
RP7981A
250.0E-6
0.1
RP7982A
1.0E-3
0.1
RP7983A
RP7984A
4 Using the Regenerative Power System
SCPI Command
To specify the pole frequency:
CURR:BWID:LEV <frequency>
SCPI Command
To specify the pole frequency:
POW:BWID:LEV <frequency>
Model
Min L
Default L
10.0 E-9
41.65E-6
10.0 E-9
166.65E-6
10.0 E-9
10.0 E-9
375.0E-6
SCPI Command
To set the equivalent series inductance:
POW:BWID:PARA:VMIN, <voltage>
To set the equivalent series inductance:
POW:BWID:PARA:LSENse, <inductance>
Max L
0.1
0.1
1.0E-3
0.1
0.1
111
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