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FireFox Synthesizer User Manual Introduction 1.1 Overview The FireFox synthesizer is a continuous wave (CW), a digital, and a sweeping broadband signal generator with an ultra high-accuracy built-in frequency reference. The unit can generate CW or sweep signals ranging from 0.00001Hz to 1640MHz in 0.00001Hz steps. It derives its frequency accuracy from an internal GPS receiver that feeds Cesium-quality (long term stability) reference signals to the Synthesizer unit. The unit does not require maintenance as Cesium oscillators do (Cesium references need expensive physics package replacements every 5 years or less), and provides better long-term time-base accuracy than non GPS-disciplined Cesium references. This manual describes the FireFox GPS disciplined broadband synthesizer module and Desktop unit. The FireFox GPS Disciplined broadband signal generator is available as a benchtop unit or OEM-module. Both units use a built-in, highly stable GPS-disciplined Oven Controlled Crystal Oscillator (GPSDO). The FireFox Synthesizer for the first time combines sine-wave and digital outputs, and a highly stable frequency reference in one instrument. This combination can generate digital CMOS and LVDS/PECL square waves, and analog RF sine-wave outputs from DC to 1.64GHz with better than 1E-012 long term frequency accuracy. © 2006 Jackson-Labs 1