Keysight N9936B FieldFox Microwave Spectrum Analyzer

Overview

The Keysight N9936B is a portable 14 GHz FieldFox microwave spectrum analyzer designed for field installation, maintenance, and troubleshooting of RF and microwave systems. With 100 MHz real-time bandwidth and comprehensive measurement capabilities, the N9936B serves as a complete platform for spectrum analysis, network characterization, and 5G/LTE field testing. The analyzer integrates over 20 RF and microwave measurement functions in a single portable unit weighing just 3.4 kg.

Key Features

• Frequency range: 9 kHz to 14 GHz with 100 MHz gap-free real-time bandwidth
• Spectrum analyzer with ±0.3 dB amplitude accuracy and -163 dBm DANL at 1 GHz
• Integrated 2-port vector network analyzer for cable and antenna testing
• Over-the-air (OTA) measurement capability for 5G NR and LTE signal analysis
• Built-in power meter supporting CW, swept-frequency, and RF pulse measurements
• Real-time signal analyzer with noise figure measurement capability
• Integrated GPS/GNSS receiver for geolocation and timestamping
• CW signal source and extended range transmission analysis (ERTA)
• I/Q data capture for advanced RF signal monitoring and analysis
• Built-in DC source and remote control capability
• Portable design at 3.4 kg with industry-standard Type-N (f) connectors

5G and Cellular Testing

The N9936B is optimized for 5G New Radio (NR) and LTE field testing with built-in demodulation and analysis tools. It supports sub-6 GHz (FR1) frequency bands and can extend to millimeter-wave (mmWave) frequencies above 24.25 GHz with optional downconverters. Keysight's 5G gNodeB field test solution, based on the FieldFox analyzer, provides a complete toolkit for RF engineers and technicians to install, verify, and troubleshoot 5G networks. The analyzer can verify hardware gNB performance including cable and antenna conditions, transmit power, control channel power, and RF spurious responses, while also measuring signal quality over-the-air, multipath synchronization, coverage area path loss, and identifying interference issues.

Applications

• 5G network deployment, installation, and troubleshooting
• Spectrum analysis and interference identification
• Cable and antenna characterization
• Signal quality measurement and analysis
• Radar pulse profiling
• LTE and 5G NR field measurements
• Millimeter-wave testing with optional downconverter
• In-service network verification