Patent ID: 7330503

Claim:
A signal generator comprising: at least one first base band unit and a second base band unit, configured for a digital base band signal, at least one first frequency offset unit, coupled to the first base band unit and configured for offsetting a frequency of an output signal from the first base band unit by a frequency offset, at least a second frequency offset unit, coupled to the second base band unit and configured for offsetting a frequency of an output signal from the second base band unit by a frequency offset, at least one first addition unit, configured for adding an output signal from the second base band unit and an output signal from the first frequency offset unit, a first I/Q-modulator coupled in series to the first addition unit, a second addition unit configured for adding the output signal from the first base band unit and the output signal from the second frequency offset unit, and a second I/Q-modulator coupled in series to the second addition unit.