The Government is seeking potential vendors capable of providing the following commercial off-the-shelf (COTS) test equipment. Procurement of Spectrum Analyzers, Keysight N9935C Field Fox 10 GHz Signa... The Government is seeking potential vendors capable of providing the following commercial off-the-shelf (COTS) test equipment. Procurement of Spectrum Analyzers, Keysight N9935C Field Fox 10 GHz Signal Analyzers (Qty 8), for Spectrum Engineering. With the following options: N9935C-B10-Bandwidth; 100 MHz N9935C-235-Pre-amplifier (RTSA) N9935C-351 I-Q Analyzer N9935C-353 IQ streaming N9935C-355 Analog demodulation. FOB Destination - 3 seperate locations within FAA.