The Keysight N9935C FieldFox C is a handheld microwave spectrum analyzer engineered for field testing and installation of microwave communication systems. This portable unit delivers advanced measurement capabilities in a rugged 3.4 kg package, supporting 5G NR, LTE, and broadband signal analysis across 3 kHz to 10 GHz.
Technical Specifications
• Frequency Range: 3 kHz to 10 GHz
• Amplitude Accuracy: ±0.15 dB (without warmup); ±0.3 dB
• System Dynamic Range: >104 dBc
• DANL @ 1 GHz: -164 dBm
• Third Order Intercept (TOI) @ 1 GHz: +10 dBm
• Phase Noise @ 1 GHz: -124 dBc/Hz (1 MHz offset), -112 dBc/Hz (10 kHz offset), -113 dBc/Hz (30 kHz offset)
• Analysis Bandwidth: 120 MHz maximum
• Real-Time Bandwidth: 120 MHz maximum
• IQ Streaming Bandwidth: 1 MHz maximum
• IF Bandwidth Options: 3 Hz through 100 kHz (10 discrete steps)
• Attenuator: 0 to 40 dB in 5 dB steps
• Ports: 2 built-in
• Internal Sources: 1
• System Impedance: 50 Ω nominal; 75 Ω with adapter and calibration kit
• Display: 6.5″ LCD-LED
• Weight: 3.4 kg (7.4 lb)
– Key Features
• Real-time spectrum analysis with 120 MHz gap-free capture
• Accurate measurements without warmup period
• Native 5G NR and LTE over-the-air measurement support
• Software-defined architecture enabling field configuration and future enhancements
• GPS/GNSS integration for geolocation and timestamping
• Multiple measurement modes: spectrum analysis, signal analysis, and interference detection
– Measurement Functions & Options
Base unit includes spectrum analyzer and real-time analysis. Optional modules support power metering (Option 310), reflection measurements including RL and VSWR (Option 320), time gating (Option 238), extended range transmission analysis (Option 209), LTE FDD/TDD over-the-air testing (Options 370/371), 5G NR OTA measurements (Option 378), and directional finding via TDOA and angle-of-arrival (Options 390/391).
– Package Contents
Standard kit includes spectrum analyzer, AC/DC adapter, localized power cord, rechargeable Li-ion battery, soft carrying case with backpack and shoulder straps, and quick reference guide.
