IMPROVING R&S®FSWP MEASUREMENT SPEED

For automated test applications, measurement time is often as important as the quality of the measurement. As with many situations, time is money. In practice, phase noise measurements are generally not considered fast, but test engineers still desire to save as much test time as possible. The Rohde & Schwarz®FSWP (FSWP) is a modern, digital signal processing based, phase-noise test set that performs many tasks in parallel in an effort to improve measurements speed. However, several measurement settings drastically affect measurement speed. This paper will discuss these settings and provide suggestions on improving overall measurement speed.

The three key instrument parameters that affect FSWP measurement speed are:

1. Number of cross correlations

2. Resolution bandwidth (RBW)

3. Offset frequency span