R&S®FS-K130PC Distortion Analysis Software
Measuring an amplifier
The
Test setup for amplifier measurements
The graphical measurement result (above) shows the most important parameters at a glance: CCDF, spectrum with spectral regrowth, amplifier compression and AM/AM conversion, AM/φM conversion, EVM. The configurable windows can be adjusted to the given task.
The numerical overview of input and output power and the crest factors at the input and output shows at a glance how much the amplifier compresses.
In addition to the error vector magnitude (EVM) that was actually measured, the numeric results table also shows the modeling error as a measure of the modeling quality (below).
How well the calculated model simulates the measured amplifier can be seen in the efficiency of the predistortion derived from the model. The software calculates a predistorted reference signal that fits the calculated model, loads the signal into the signal generator, and then measures the improvement that was actually achieved. A direct comparison between the original signal (trace 1, blue) and the predistorted signal (trace 2, black) show the improved adjacent-channel leakage ratio measured by the analyzer.
To export the amplifier models and the predistortion models, the software creates a readable, plain text MATLAB® function that can then be used for system simulations.
| Data export formats | |
|---|---|
| Measurement report | HTML file |
| Trace data - grafical | vector format: EMF bitmap format: PNG (export to file and clipboard) |
| Trace data - data | text file (CSV format) |
| Measurement and reference signal (synchronized) |
text file (CSV format) binary file (configurable format) MATLAB® |
| Software configuration | config file HTML configuration report |
Measurement data and results can be exported in many different formats, making them compatible for use in other programs. This facilitates further analysis and simplifies the documentation of the results.
