Keysight N9912A/104 FieldFox Handheld RF Analyzer (4 GHz)
The Keysight N9912A/104 FieldFox Handheld RF Analyzer is a compact, all-in-one solution for field testing and troubleshooting of RF systems. With a frequency range of 9 kHz to 4 GHz, this analyzer combines spectrum analysis, vector network analysis, cable and antenna testing, and power measurement in a rugged, portable form factor. Built for demanding environments, it delivers the accuracy and reliability you need for site maintenance, installation, and in-field verification.
Key Features & Highlights
- Frequency Range: 9 kHz to 4 GHz covers a wide spectrum of applications including cellular, Wi-Fi, and satellite communications.
- Dynamic Range: >100 dB ensures accurate measurements even in high-signal environments.
- Measurement Accuracy: ±0.5 dB for reliable, repeatable results.
- Fast Sweep Speed: Up to 1000 sweeps per second reduces test time and increases productivity.
- Intuitive Touchscreen: 5.7-inch color LCD with user-friendly menus simplifies operation for both experts and novices.
- Portable & Rugged: Weighs only 2.5 lbs with up to 8 hours of battery life, ideal for field use.
- All-in-One Capability: Combines spectrum analysis, vector network analysis, cable and antenna testing, and power measurement in one instrument.
Applications
The Keysight N9912A/104 is perfect for field engineers and technicians working in:
- Cellular and wireless network installation and maintenance
- Cable and antenna system testing
- RF interference troubleshooting
- Satellite communication systems
- General RF component testing and verification
With its combination of performance, portability, and ease of use, the Keysight N9912A/104 FieldFox is an essential tool for ensuring the integrity of RF systems in the field.





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