The Keysight FieldFox B series combines cable & antenna tester (CAT), vector network analyzer (VNA) and spectrum analyzer (SA) in one robust, battery-operated handheld device. The analyzers are designed for tough field use - shockproof, dust and splash-proof to MIL standard, with a large transflective display, glove-operated keypad and replaceable battery for several hours of operation. CalReady ensures immediate measurement readiness after switching on; precise ECal calibrations are optionally available. The devices are fully software-defined and can be flexibly expanded to include options such as Real-Time Spectrum Analysis (RTSA), IQ Analyzer/Streaming, Noise Figure, Pulse and EMC measurements and Over-the-Air (OTA) for LTE and 5G. Typical applications include installation, maintenance and troubleshooting in cellular, satellite, radar, 5G, broadcast, defense and RF measurement environments.
The N9961B is part of the N996xB series within the FieldFox-B family and is an advanced portable spectrum analyzer with an operating frequency range of 9 kHz to 44 GHz. It is aimed at users who require the highest precision and bandwidth for Ka-band, 5G, radar, defense and satellite applications. Compared to the N9960B (up to 32 GHz), the N9961B significantly extends the frequency range and enables precise analysis in the upper Ka-band without compromising on portability, robustness or ease of use. The measurement results achieve laboratory quality - thanks to wide dynamic range, excellent linearity and precise frequency stability. Like all models in the N996xB series, the N9961B supports extensive software options, including RTSA, noise figure, pulse analysis, OTA, EMI and IQ data acquisition. It combines maximum performance and frequency coverage with the compact, field-ready design of the FieldFox series.
Technical product features of the series:
- Meter combination: CAT, VNA and/or SA depending on model; the N9961B is a specialized spectrum analyzer with optional functions for RTSA, IQ analysis and pulse generator.
- Frequency ranges depending on model: from 9 kHz to 54 GHz (N9960B to N9963B); the N9961B covers up to 44 GHz.
- Ruggedized design: for field use (-10 ... +55 °C), shock and vibration resistant; dust and splash-proof design according to MIL standard.
- Mobile & ergonomic: approx. 3.3 kg, large transflective display, large buttons, glove-operated, replaceable battery (up to 4.5 h runtime).
- High measurement accuracy: frequency stability ±0.9 ppm (typ. ±0.5 ppm), GPS reference ±0.01 ppm; amplitude accuracy ±1.1 dB (up to 18 GHz).
- Flexible analysis: RTSA up to 120 MHz real-time bandwidth, IQ streaming, noise figure, pulse, OTA (LTE/5G), channel and EMC measurements.
- Dynamics & sensitivity: up to 114 dB dynamic range, noise density <-155 dBm/Hz; with preamplifier high sensitivity even with small signals.
- Interfaces & GPS: USB & LAN, external Ref/Trigger, optional GNSS, integrated power meter (option 310), USB power sensor support.
- Software integration: Compatible with PathWave 89600 VSA, Keysight FieldFox DataLink, Surveyor & Spectrum Management Software; SCPI-capable for remote control.
- Accessories & upgrades: numerous field upgrades via license key (RTSA, pulse analysis, EVM, noise figure, OTA, EMI analyzer, tracking generator, pulse generator and much more).
