1GP104

Measurements & Results

The external attenuator and cable loss (i.e. output losses) can be compensated by setting a reference level offset in the FSW. The input losses can be compensated by setting a power offset in the SMW.

The measured time-averaged PAE of the PA is 52 % in this example. This value is calculated from the time-averaged input RF power (user input), output RF power

(measured), and input DC power (measured).

The following figure shows the measured PAE over input RF power. The red color indicates high density of data points.

9.9 Result Summary

The following figure shows the result summary with the results for e.g. raw EVM, input and output power and resulting amplifier gain, measured voltage and current, average

PAE, and many more.

1GP104_1E

The average PAE value is calculated from the time-averaged input RF, output RF, and input DC powers.

Rohde & Schwarz Envelope Tracking and Digital Pre-Distortion Test Solution for RF Amplifiers 43