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Power analysis (option R&S
RTA-K31)
R&S
®
RTA4000
371
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 gate of the
transistor.
● Connect the negative (-) signal socket of the differential probe to the source of
the transistor.
● Connect the current probe to the drain 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 "Source".
13. 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 current, the voltage
and the power. Also, the numeric measurement results are shown in the lower left
corner. For details, see
Chapter 14.6.2.1, "Modulation results"
14.6.2.3
Modulation analysis settings
Required probes:
●
Differential voltage probe
●
Current probe
► To open the "Modulation" settings menu:
a) Press the Apps Selection key.
b) Tap "Power Analysis".
Switching power measurements