Fluke 9640A RF Reference Source, 10 Hz - 4 GHz, No option

Fluke 9640A RF Reference Source, 10 Hz - 4 GHz, no option.  The leveling heads are not included.Product Overview The 9640A Series is an RF reference that takes the central role and typically halves the cost of a high capability RF calibration system. Its unique features and performance enable it to replace up to four signal sources (from audio/function generators to RF signal and low phase noise sources), power meters and power sensors, step attenuators, filters, pads, couplers, and also a frequency counter with the 9600FC integrated counter option. For many spectrum analyzer models operating below 4 GHz, only the 9640A Series is required to perform their entire calibration. The 9640A Series performs more than 80 percent of all the tests required during high performance spectrum analyzer calibration. For workload with frequency requirements beyond 4 GHz, an existing RF and microwave source can be used alongside the 9640A rf reference to address the few remaining higher frequency test p