Keysight Technologies RP7900 Series, Operating And Service Manual

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Small Signal Programming Response (All Models)
The following graphs show the output voltage and current programming response characteristic. The
voltage response applies with no load conditions. The current response applies with AC short-circuit
conditions where the DUT is a low impedance operating above 10% of the rated output of the RPS,
with less than 1 foot of load leads. The table provides additional bandwidth details.
Voltage Priority Programming Response - open circuit Current Priority Programming Response - AC short circuit
Priority Comp 0 (-1dB) Comp 0 (-3dB) Comp 1 (-1dB) Comp 1 (-3dB) Comp 2 (-1dB) Comp 2 (-3dB)
20 V
models Voltage 5.6 kHz 8.3 kHz 3.8 kHz 4.7 kHz 1.6 kHz 2.0 kHz
Current 550 Hz 2.0 kHz 1.3 kHz 2.7 kHz N/A N/A
80 V
models Voltage 5.7 kHz 7.5 kHz 5.3 kHz 6.6 kHz 4.9 kHz 5.9 kHz
Current 1.9 kHz 2.7 kHz 3.1 kHz 3.5 kHz N/A N/A
160 V
models
Voltage 5.5 kHz 7.0 kHz 5.1 kHz 6.2 kHz 4.8 kHz 5.6 kHz
Current 1.9 kHz 2.5 kHz 3.0 kHz 3.5 kHz N/A N/A
Measurement Accuracy and Resolution - with shorter measurement intervals
The following table shows changes to the short-term measurement accuracy and resolution with
various number of power line cycle (NPLC) measurement settings. Changes are due to the A-to-D
converter’s noise performance. The table’s baseline is 1 NPLC with no added noise. To determine the
measurement accuracy at shorter averaging intervals, simply calculate the percent of range to add,
then add it to the fixed accuracy value in the specification table.
For example, to determine the percent of range to add to the accuracy specification of the voltage
measurement when making measurements at 0.003 NPLC, simply multiply the full voltage rating by
the "% of range added to spec value" as follows: 20 V x 0.006% = 1.2 mV. Add this number to the offset
part of the measurement accuracy specification: 2 mV + 1.2 mV. The new voltage measurement
accuracy is 0.02% + 3.2 mV at 0.003 NPLC.
Keysight RP7900 Series Operating and Service Guide 49
1 Quick Reference