The Keysight N9936B FieldFox is a handheld microwave spectrum analyzer delivering comprehensive RF measurements from 9 kHz to 14 GHz in a single ruggedized platform. Built for field deployment in aerospace, defense, and telecommunications environments, it combines spectrum analysis with real-time signal capture, pulse characterization, and over-the-air measurements without extended warm-up delays.
– Technical Specifications
Frequency coverage spans 9 kHz to 14 GHz with standard 10 MHz analysis bandwidth; optional 40 MHz, 100 MHz, and 120 MHz bandwidths enable gap-free real-time spectrum analysis up to 120 MHz. Amplitude accuracy is ±0.3 dB. Display average noise level reaches -163 dBm at 1 GHz, with phase noise of -117 dBc/Hz at 10 kHz offset. Third order intercept is +13 dBm at 2.4 GHz rising to +15 dBm, delivering spur-free dynamic range exceeding 104 dB at 2.4 GHz. Trace noise measures 0.0008 dB rms. Maximum IQ streaming bandwidth is 1 MHz.
– Key Features
• Real-time spectrum analysis captures intermittent signals with up to 120 MHz gap-free bandwidth
• Pulse profile characterization for radar signal analysis
• Over-the-air measurements for 5G NR, LTE, and 5GTF
• I/Q data capture with wideband recording of fully corrected IQ data
• Built-in power meter and GPS/GNSS receiver for geolocation and timestamped measurements
• Spectrogram display for rapid identification of interference sources
• Pulse measurements including average and pulse power via USB power sensor with time gating
• Noise figure and EMF measurements supported for LTE FDD and 5G NR
• Extended range transmission analysis available with specific options
– Typical Applications
Radar pulse profiling, in-field signal monitoring, 5G and LTE compliance testing, spectrum interference investigation, and real-time intermittent signal detection.
– Compatibility & Integration
Type-N (f) connectors standard; 3.5 mm (m) connectors available via Option 100. Two built-in ports accommodate multi-port configurations.
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