The Keysight N9935A FieldFox is a handheld microwave spectrum analyzer that delivers field-proven spectrum analysis, signal tracking, and interference detection across 100 kHz to 9 GHz. Engineered for mobile deployment, this 3.0 kg instrument combines measurement precision with rugged construction—dust-free design, water-resistant housing, and MIL-PRF-28800F Class 2 compliance for harsh field environments.
Technical Specifications
Frequency & Signal Performance
• Spectrum analysis: 100 kHz to 9 GHz
• Tracking generator: 30 kHz to 9 GHz (optional)
• Resolution bandwidth: 1 Hz to 500 kHz (span dependent)
• Video bandwidth: 1 Hz to 5 MHz
• Phase noise: -111 dBc/Hz at 10 kHz offset
• Spur-free dynamic range: ≥ 105 dB
• Real-time bandwidth: 10 MHz
• Minimum signal duration: 22 ns or 12.2 μs at full amplitude accuracy
Power & Input
• Maximum input power: +27 dBm (0.5 W, ± 50 VDC)
• Input attenuator: 0 to 30 dB in 5 dB steps
• Amplitude accuracy: ± 0.5 dB (without warmup)
• DC bias source: 1 to 32 VDC, max 650 mA, 8 W maximum
Display & Operation
• 6.5″ LCD color display
• 6 markers
• Sweep time (zero span): 1 μs to 1000 s
• Trigger modes: Free run, external, video, RF burst, periodic
Battery & Power
• Lithium-ion, 10.8 V, 4.6 A-h
• Battery life: 3.5 hours typical
Physical Dimensions
• 292 × 188 × 72 mm (11.5 × 7.4 × 2.8 inches)
• Weight: 3.0 kg (6.6 lb) with battery
• Operating temperature: -10 to +55 °C
• Storage temperature: -51 to +71 °C
• IP53 rated per IEC/EN 60529
– Key Features
• Built-in power meter covering 100 kHz to 9 GHz
• USB power sensor support up to 24 GHz (sensor dependent)
• Time gating, channel power, adjacent channel power, and occupied bandwidth measurements
• Extended range transmission analysis and interference analysis functions
• Type-N female connector
• Data export: PNG, CSV, TXT, SDF, Matlab (MAT) formats
– Compatibility & Integration
• USB and LAN connectivity
• SCPI-compliant remote control over LAN
• FieldFox Data Link Software integration
• FieldFox Remote Viewer iOS app support
• Configurable measurement options for spectrum analysis, power metering, tracking generation, VSWR/reflection measurements, GPS, and DC bias voltage sourcing
