The Keysight N9938A-307 option 307 adds a built-in GPS receiver to the FieldFox analyzer. The built-in GPS receiver provides geolocation tags to measurements. The geodata—time, latitude, longitude, and elevation—can be displayed and saved in data files. In addition to location information, the GPS provides an accurate frequency reference to improve accuracy.Without locking to GPS, the frequency reference accuracy is +/- 0.7 ppm +…The Keysight N9938A-307 option 307 adds a built-in GPS receiver to the FieldFox analyzer. The built-in GPS receiver provides geolocation tags to measurements. The geodata—time, latitude, longitude, and elevation—can be displayed and saved in data files. In addition to location information, the GPS provides an accurate frequency reference to improve accuracy.Without locking to GPS, the frequency reference accuracy is +/- 0.7 ppm + aging. When locked to GPS, the accuracy improves to +/- 0.010 ppm.When the GPS antenna is disconnected, FieldFox can maintain an accuracy of +/- 0.2 ppm. This is the maximum drift expected in the frequency reference when the ambient temperature changes +/- 5 deg. C from the temperature when the GPS signal was last connected. There is no specific time limit regarding frequency accuracy and GPS, temperature is the main driver. The frequency accuracy can easily be maintained for a week, if the temperature is stable. Over the long run, the aging rate will apply.In order to have GPS information, you will need: Read More
