Saelig Company, Inc. (Saelig) has introduced the APSIN26G - a new low-noise, ultra-fast-switching microwave signal generator covering a frequency range from 100 kHz up to 26 GHz. It provides micro-Hz frequency resolution, a wide and accurately-flat output power range to +20 dBm, and very low spurious levels. Comprehensive AM, low-distortion, wideband DCFM, and high speed pulse modulation allows for testing a wide range of receivers.