Why did you include a GPS receiver in the FireFox synthesizers?
Before FireFox, customers had to purchase a separate GPS disciplined Cesium or Rubidium frequency reference, and a synthesizer unit and connect these together to get both accuracy, and resolution. The cost of these units easily exceeds $5000, and leaves the user with two power-hungry, clunky units that have to be connected to each other. FireFox uses an internal very high-end Motorola M12 timing receiver, which is specialized for reference timing applications. The GPS timing receiver provides the best available timing reference signal on the market by compensating for the receivers’ location, thus providing a timing signal that is synchronized to within 20ns of UTC anywhere in the world. This timing signal is used to synchronize a high-end, low-noise 10MHz OCXO to UTC which itself provides the reference signal to all FireFox PLL’s and the DDS. Combining both the GPS disciplined Frequency reference and the Synthesizer functionality into one unit allows exceptional accuracy (the frequenc
