Keysight N9936B 14 GHz FieldFox Handheld Microwave Spectrum Analyzer

Keysight N9936B 14 GHz FieldFox Handheld Microwave Spectrum Analyzer

The Keysight N9936B FieldFox is a handheld microwave spectrum analyzer that measures radio-frequency signals from 9 kHz to 14 GHz. It combines spectrum analysis with a portable, battery-powered design, allowing engineers and technicians to perform measurements at equipment installations and remote sites.

The analyzer displays signal strength across a selected frequency range, helping users see where signals occur and how much power they contain. This makes it useful for checking transmitters, identifying unwanted emissions and harmonics, and investigating interference that can affect communications or microwave equipment.

Designed for field use, the N9936B weighs approximately 3.4 kg and provides measurement capabilities in a compact instrument. Its portable construction makes it practical for installation, maintenance, and troubleshooting work where transporting a full-size laboratory analyzer would be inconvenient.

Optional capabilities expand its ability to investigate difficult signals. An available preamplifier helps detect weak signals, while interference analysis and spectrogram displays show changes over time. With the appropriate options, real-time spectrum analysis offers up to 120 MHz of gap-free bandwidth to capture intermittent signals that conventional sweeping can miss.

The N9936B can also support specialized tasks such as radar pulse characterization, signal recording, and GPS-based measurement tagging when configured with the relevant options. An optional tracking generator extends its usefulness to transmission measurements on components. Its capabilities therefore depend on the installed hardware and software licenses, allowing the instrument to be configured for particular testing needs.

Features:

• 9 kHz to 14 GHz frequency range: Measures RF and microwave signals.
• Spectrum analysis: Displays signal strength versus frequency to identify signals, harmonics, and interference.
• Accurate amplitude measurements: Keysight advertises ±0.3 dB accuracy without warmup under specified conditions.
• Battery operation: Uses a rechargeable lithium-ion battery for field measurements.
• Durable construction: Designed for installation, maintenance, and troubleshooting in demanding environments.