The 845 Series comprises low-noise and fast-switching microwave signal generators featuring fast switching speeds up to 10 µs, low spurs, low harmonics, a 100 KHz to 26.5 GHz frequency range, a compact design, a 1U package, and OEM board packages. This application note focuses on how to program and run fast frequency (or generalized list) sweeps using the Model 845 Series signal generators with the fast switching option FS.