category
Dec 9, 2025
Handheld analyzer from Keysight targets 120 MHz IQ streaming in the field
eeNews Europe
Keysight Technologies has introduced the N99xxD FieldFox handheld analyzer for engineers working in increasingly congested RF environments. The handheld analyzer supports 120 MHz gap-free IQ streaming and high-speed 10 GbE data transfer for wideband signal capture directly on site. It is positioned for spectrum monitoring, interference hunting and field verification tasks that would traditionally rely on benchtop instruments.
For eeNews Europe readers, the product could help RF design and test teams in Europe characterise 5G, radar, satellite and emerging 6G signals closer to deployment. It may also be relevant for spectrum regulators and defence users who need portable tools that still integrate into lab-grade workflows.
The N99xxD-Series extends Keysight's FieldFox family with a focus on wideband signal analysis in demanding RF environments, from commercial networks to mission-critical systems. According to the company, the platform combines the rugged mechanics expected of a field unit with measurement performance that potentially approaches lab analysers, aiming to reduce the risk of missed transient or intermittent events.
Key specifications include 120 MHz gap-free IQ streaming with integrated SFP+ interfaces for 10 GbE links, which potentially enables uninterrupted data capture and efficient offload to storage or analysis back-ends. Wideband analysis and playback are intended to support tasks such as spectrum utilisation monitoring, interference hunting and characterisation of complex modulation schemes.
The N99xxD-Series spans 14 handheld analyzer models, in combination and spectrum-only variants, with maximum frequencies of 14, 18, 26.5, 32, 44, 50 and 54 GHz. More than 25 software-defined applications are available, including vector network analysis, real-time spectrum analysis, noise figure, EMI diagnostics, pulse analysis and direction-finding based on angle of arrival and time difference of arrival. A Linux-based operating system is used to tighten
