FieldFox Microwave Analyzers N9950B/51B/52B/53B

Push Field Testing to New Limits

Keysight FieldFox handheld analyzers are the world’s most integrated and precise analyzers. Now, FieldFox is pushing the limits even higher by extending the frequency coverage to 54 GHz and the real-time analysis bandwidth up to 120 MHz.  FieldFox functions as a cable and antenna tester and can be configured to also perform as a full 2-port network analyzer, signal analyzer, real-time spectrum analyzer, I/Q analyzer, and more. FieldFox is the "Swiss Army knife" of portable RF test equipment designed to meet all your field-test needs.

Key features

- Cable and antenna analyzer (CAT)

- Spectrum analyzer

- Full 2-port vector network analyzer

- Built-in power meter

- Independent signal generator

- Vector voltmeter 

- Interference analyzer

- Real-time spectrum analyzer (RTSA)

- Over-the-air (OTA) LTE FDD/TDD

- Over-the-air (OTA) 5G NR

- Phase array antenna support

- Indoor and outdoor mapping

- Extended range transmission analysis (ERTA)

- Pulse measurement - Analog demodulation

- Noise figure (NF) measurements

- Built-in variable DC voltage source

- Frequency counter measurements

- Electromagnetic field (EMF) measurements

- TDR Cable measurements

- Built-in GPS receiver

- ECal support

Product highlights

- Rugged and weather resistant:

- Meets MIL-PRF-28800F Class 2, no vents, wide operating temperature of -10 to +55°C (14 to 131°F)

- Meets IEC/EN 60529 IP53 requirements

- Type tested and meets Procedure 1 requirements for operation in explosive environments. MIL-810G, Method 511.5

- Portable: compact, lightweight 3.34 kg/7.35 lb package

- Combination analyzers:

- Signal analyzer provides best amplitude accuracy of ±0.2 dB, with no warm-up required

- Real-time spectrum analyzer (RTSA) with up to 120 MHz bandwidth and 5.52 μs minimum signal duration with 100% POI at full amplitude accuracy

- VNA CalReady allows quick and accurate microwave device measurements in the field

- Full-band tracking generator up to 54 GHz

- Options and apps are all customer upgradeable