The Model 845 Series is a series of low-noise and fast-switching microwave signal generators covering continuous frequency ranges from as low as 100 kHz up to 12, 20, and 26.5 GHz. The 845 Series provides an accurately leveled output power range and high spurious suppression. Advanced frequency synthesis with fractional-N divider makes for low SSB phase noise and micro-Hz resolution. The standard Model 845 includes amplitude modulation (AM), DC-coupled, low distortion wideband frequency modulation (FM), PM, FSK and PSK, frequency chirp, and fast pulse modulation with internal pulse train generator. Three internal modulations sources are available. Ideal for aerospace, radar, and defense.