The Keysight N9935B FieldFox is a handheld microwave network and spectrum analyzer engineered for field characterization of RF and microwave devices and systems. It delivers immediate spectrum analysis with ±0.3 dB measurement accuracy—no warm-up required—and captures intermittent signals across a 120 MHz gap-free real-time bandwidth. The instrument performs cable and antenna analysis, radar pulse profiling, over-the-air measurements for 5G NR and LTE, and RF signal monitoring via I/Q data capture. Built-in GPS/GNSS provides geolocation and timestamping. Weighing 3.4 kg, it integrates a power meter and supports optional tracking generator, pre-amplifier, and extended range transmission analysis (ERTA) capabilities.
– Technical Specifications
• Frequency Range: 9 kHz to 9 GHz (usable down to 5 kHz)
• Spectrum Analyzer Accuracy: ±0.3 dB (without warm-up)
• Real-Time Bandwidth: 120 MHz gap-free
• Output Power (with tracking generator option): Up to 1 dBm
• Test Port Connector: Type-N (f)
• Weight: 3.4 kg (7.4 lb)
• Dimensions: 11.5 in (H) × 7.4 in (W) × 3.2 in (L)
– Key Features
• Spectrum analysis with immediate, accurate measurements
• Cable and antenna characterization
• I/Q data capture for RF signal monitoring and analysis
• 5G NR and LTE over-the-air measurement capability
• Radar pulse profile characterization
• Integrated power meter
• Optional tracking generator for extended measurement range
• Optional pre-amplifier for enhanced sensitivity
• Integrated GPS/GNSS for geolocation and timestamping
• Interference analysis with spectrogram display (Option 236)
• USB power sensor measurements versus frequency (Option N9935BU-208)
• Extended Range Transmission Analysis support (Option N9935BU-209)
• Optional remote control (N9935BU-030)
– Typical Applications
• Field-based RF and microwave device testing
• 5G NR and LTE signal characterization
• Radar pulse analysis and profiling
• Interference identification and monitoring
• Cable and antenna validation
– Compatibility & Integration
• Compatible with standard HP/Agilent/Keysight mechanical calibration kits and all Keysight USB ECal modules
• Supports 89600 VSA software for signal recording and evaluation
• LAN connectivity for data transfer
• Includes AC/DC adapter, rechargeable Li-ion battery, soft carrying case with backpack and shoulder straps, and quick reference guide
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