The 825-M is an agile ultra-low phase noise RF signal source from 8 kHz to 20 GHz RF Synthesizer. It is available in single-channel or multichannel configurations. A single channel 825-M is packaged in a compact enclosure, or can be ordered with a touch-screen display, or a 1U 19″ rackmountable version. The multi-channel version (2, 3, or 4 channels) is packaged in a 19” 1U  rackmount enclosure. On multi-channel units, all channels are locked to a single reference source to achieve high phase coherence between each channel. The state-of-the-art Fast Control Port (FCP) provides very fast frequency and amplitude switching achieving less than 10us per step. Model 825-M’s excellent harmonic and spurious performance in combination with fast switching makes the instruments suitable where high performance is required in labs or production facilities.