Instrument functions
R&S
®
NGU
53
User Manual 1179.2531.02 ─ 03
Figure 6-13: NGU201 model switches from VPM to CPM
Figure 6-14: NGU401 model switches from VPM to CPM
6.4
Capacitance mode
When the R&S
NGU connects to a capacitance DUT with leads, the leads and capaci-
tance from the DUT forms a lowpass filter which causes current oscillation at the out-
put of the source measure unit. See blue in
To prevent such unstable supply conditions, the R&S
NGU provides several bandwidth
modes to optimize the output response time with capacitance loads in the capacitance
mode. In this mode, the R&S
NGU improves the output transient behavior by compen-
sating the capacitance and displays the current directly at the DC-DC converter. See
red in
.
Capacitance mode
