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6 Advanced Source, Measurement, and Control
Power Module
N6751A/52A, N6761A/62A
N6753A–56A, N6763A–66A
N673xB, N674xB, N677xA
N6751A, N6752A
N6753A–N6756A
N6761A–N6762A
N6763A–N6766A
N673xB, N674xB, N677xA
* Note Nyquist-limited to 25 kHz due to 50 kHz digitization rate.
Note that when dynamic current correction is turned off, you will see additional current in the output
current measurement as the output capacitor charges and discharges when changing from one
voltage value to another voltage value.
The values in italics in the table will change based on the resistance of the output load. The values
specified in the table only apply when the output load resistance is at or close to zero ohms. At larger
resistance values, errors are introduced into the measurement due to the interaction of the output
load and the power module's output capacitor. Use the following formula to calculate the largest
frequency that can be measured without errors.
f = maximum measurable frequency without measurement errors
Co = the output capacitor value (from the following table)
RL = the load resistance
Power Module
N6751A, N6752A, N6761A, N6762A
N6753A, N6755A, N6763A, N6765A
N6754A, N6756A, N6764A, N6766A
N6773A
N6774A
N6775A
N6776A, N6777A
For example, if you are measuring the output current on a Keysight N6731B with a 10 ohm load
connected to the output, and with dynamic current correction turned off, the largest frequency that
can be measured without introducing measurement errors is 530 Hz. If a 1 ohm load were connected
to the output, the largest frequency that could be measured without errors would be 5.3 kHz.
218
Dynamic Current Correction
On
Voltage measurements
10 kHz BW (– 3dB)
N/A
10 kHz BW (– 3dB)
Current Measurements
2 kHz BW (– 3dB)
N/A
2 kHz BW (– 3dB)
N/A
2 kHz BW (– 3dB)
Co Value
Power Module
25.4 μF
N6731B, N6741B
4.7 μF
N6732B, N6742B
2.2 μF
N6733B, N6743B
13.2 μF
N6734B, N6744B
11.2 μF
N6735B, N6745B
4.02 μF
N6736B, N6746B
3.54 μF
Off
10 kHz BW (– 3dB)
10 kHz BW (– 3dB)
25 kHz *
10 kHz BW (– 3dB)
10 kHz BW (– 3dB)
2 kHz BW (– 3dB)
2 kHz BW (– 3dB)
25 kHz *
Co Value
30 μF
23.5 μF
13.4 μF
9.8 μF
12.8 μF
3.52 μF
Keysight N6705C User's Guide
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