Rohde & Schwarz UPD

This audio analyzer performs practically all types of audio measurement, from frequency response measurements through to externally controlled sweeps with reference traces, determination of 3rd order difference frequency distortion, spectral display of demodulated wow and flutter signals, etc.

In contrast to many other audio analyzers, this unit is capable of performing real dual channel measurements in the audio frequency range, ie: there is no need for switchover between two inputs and this type of measurement is not limited to a few special cases.