User`s guide

Advanced Source and Measurement Functions 6
Model N6705 User’s Guide 173
Measurement System Bandwidth
NOTE
The following applies when making dynamic current measurements; not when
making static (or DC) measurements. This information does not apply to
models
N678xA SMU. For N678xA bandwidth information, refer to the Agilent N6700
Modular Power System Family Specifications Guide.
The measurement bandwidth of the DC Power Analyzer is dependent
on the following factors:
 Whether voltage or current is being measured.
 Whether dynamic current correction has been turned on or off.
 The analog bandwidth of the power module.
The following table documents the bandwidth for the above-
mentioned factors.
Power Module Dynamic Current
Correction turned on
Dynamic Current
Correction turned off
Voltage measurements
N6751A/52A, N6761A/62A 10 kHz BW (– 3dB) 10 kHz BW (– 3dB)
N6753A–56A, N6763A–66A N/A 10 kHz BW (– 3dB)
N673xB, N674xB, N677xA 10 kHz BW (– 3dB) 25 kHz
Note
Current measurements
N6751A, N6752A 2 kHz BW (– 3dB) 10 kHz BW (– 3dB)
N6753A–N6756A N/A 10 kHz BW (– 3dB)
N6761A, N6762A 2 kHz BW (– 3dB) 2 kHz BW (– 3dB)
N6763A–N6766A
N/A
2 kHz BW (– 3dB)
N673xB, N674xB, N677xA
2 kHz BW (– 3dB)
25 kHz
Note
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 the shaded areas of 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
C
O
= the output capacitor value
(from the following table)
R
L
= the load resistance
C
O
=
1
2
π
f
R
L