With connected simulation and test solutions from Agilent Technologies, the designer’s testbench consists not only of test equipment, but also includes the Advanced Design System (ADS) for design and simulation of systems and circuits. These connected solutions let designers quickly perform simulations to evaluate deisgn trade-offs and what-ifs, and then turn the simulated signal into a real RF test signal for hardware test. Conversely, deaigners can take the measured output signal from the DUT and bring int into ADS for additional analysis. This application note discusses the connected signal source capapbility beween ADS and the ESG arbitrary waveform generator from Agilent. The technique is not limited to this application, however, and designers will discover their won applications as these solutions become more widely understood.