Power analysis (option R&S RTM-K31)
R&S
®
RTM3000
375User Manual 1335.9090.02 ─ 09
e) Scroll down. Select "Power".
To adjust the probes, open the "Probe" menu. For details, see Chapter 14.1.2, "Probe
settings for power measurements", on page 344.
The settings for the voltage and current sources are the same as for quality analysis,
see "Voltage" on page 350 and "Current" on page 350.
Set to screen
Resets the cursors to their initial positions. This is helpful if the cursors have disap-
peared from the display or need to be moved for a larger distance.
14.7 Power path power measurements
Power path measurements are used for analysing the behavior of the devices that con-
trol the power flow through the switched-mode power supply (SMPS) circuit, including
switching devices and inductors.
● Efficiency...............................................................................................................375
● Switching loss....................................................................................................... 378
● Turn ON/OFF time................................................................................................ 381
● Safe operating area (S.O.A.).................................................................................384
14.7.1 Efficiency
The power efficiency analysis measures the input and the output power of a power
supply. The power efficiency of the power supply is then calculated as the ratio of the
output power and the input power.
14.7.1.1 Efficiency results
The results of " Efficiency" measurements are:
●
the voltage waveform
●
the current waveform
Power path power measurements
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