A measuring device for transmitter performance measuring is provided. The measuring device includes a first measuring path adapted to receive a measuring signal from a device under test, and to determine first measuring values from the measuring signal. The measuring device further includes a second measuring path adapted to receive the measuring signal, and to determine second measuring values from the measuring signal. The measuring device further includes a noise suppressor, connected to an output of the first measuring path and to an output of the second measuring path, wherein the noise suppressor is adapted to receive the first measuring values and the second measuring values, and to suppress noise by multiplying each of the first measuring values with a respective one of the second measuring values to generate a respective measuring value product.