The APMS is a phase-coherent, multi-channel, ultra-fast switching, and low phase noise signal generator series with a frequency range from 300 kHz to 6, 12, 20, 33 and 40 GHz. They are ideally suited for a wide range of applications where good signal quality, accurate signal level and wide output power range are required. Excellent phase noise is combined with good spurious and harmonic rejection and a leading-edge switching speed of 25 μs with option FS.