DETECTOR MODULE, SIGNAL PROCESSING MODULE, AND MEASUREMENT INSTRUMENT

A detector module (24) for a measurement instrument (12) is described. The detector module (24) comprises a first signal input (54), a second signal input (58), and an averaging sub-module (64). The first signal input (54) is configured to receive a first complex-valued measurement signal associated with an input signal received from a device under test (14). The second signal input (58) is configured to receive a second complex-valued measurement signal associated with the input signal received from the device under test (14). The averaging sub-module (64) is configured to determine an average of the first complex-valued measurement signal and of a complex conjugate of the second complex-valued measurement signal over a predetermined number of samples, thereby obtaining a complex-valued average signal. The averaging sub-module (64) is configured to generate an output signal based on the complex-valued average signal. Further, a signal processing module (18) and a measurement instrument (12) are described.