Power analysis (option R&S
RTA-K31)
R&S
®
RTA4000
386
User Manual 1335.7898.02 ─ 08
3. Connect the differential voltage probe and the current probe to the oscilloscope.
It is recommended that you use a high-voltage differential probe for measurements
at the DUT power input.
4. Demagnetize the current probe. For details, see the user manual of your current
probe.
5. Select the "Tools" tab.
6. Connect the probes to the R&S
RT-ZF20 power deskew fixture.
7. "Deskew" the probes and adjust the "Zero Offset".
8. Disconnect the probes from the R&S
RT-ZF20 power deskew fixture.
9. Connect the probes to the DUT:
● Connect the positive (+) signal socket of the differential probe to the drain of
the transistor.
● Connect the negative (-) signal socket of the differential probe to the source of
the transistor.
● Connect the current probe to the source of the transistor.
10. Close the "Power Analysis".
11. Press the "Menu" button and scroll to the "Power" menu.
12. Select the correct channels for the "Current" and the "Voltage" sources.
13. Open the "Mask Setup" menu and define the mask parameters.
14. Open the "Test Setup" menu and define the test parameters.
15. Press the Autoset button to adjust the display scales automatically or adjust them
manually.
On the screen, you can see the measurement waveforms of the currents and the
voltages. Also, the numeric measurement results are shown in the lower right cor-
ner. For details, see
Chapter 14.7.4.1, "Safe operating area results"
14.7.4.3
Safe operating area settings
Required probes:
●
Differential voltage probes
●
Current probe
► To open the "Efficiency" settings menu:
a) Press the Apps Selection key. Tap "Power Analysis".
Power path power measurements
