Network analyzers are used to measure so-called scatter parameters (S-parameters). These describe the behaviour of electrical components with the help of wave magnitudes. Whether simple cables, filters, amplifiers or complex subsystems, the following applies to all these components: Different loads can have unseen effects on the measured values over time.
The solution is calibration as it reduces measurement uncertainties to a minimum. Calibration is therefore recommended if the measuring device is configured for a specific measuring task. The focus is on eliminating systematic errors – both in the measuring device itself as well as in the whole external accessories associated with the measurement setup.