To ensure high transmission quality, information-transmitting components should not distort RF signals nor generate power in adjacent channels. At the same time, they must be very efficient in order to minimize power consumption. Predistortion is the method commonly used to achieve higher output power without increasing power consumption. To calculate the appropriate predistortion, the amplifier has to be characterized and its distortion behaviour has to be modeled.
The R&S®FS-K130PC software simplifies these tasks. The software measures the nonlinearity and calculates the appropriate predistortion using a model selected by the user. It also controls the required measuring instruments, such as signal generators and analyzers, and reads out and synchronizes the I/Q data. The R&S®FS-K130PC software uses signals with an adjustable crest factor and a user-selected bandwidth to simulate the actual operating conditions much more accurately than is possible with the traditional method of using sinewave signals to measure nonlinearity. Even two ports with memory effects can be accurately modeled and predistorted, also with user-specific signals.
