Keysight N9935C 10 GHz FieldFox Handheld Microwave Spectrum Analyzer

Keysight N9935C 10 GHz FieldFox Handheld Microwave Spectrum Analyzer

The Keysight N9935C 10 GHz FieldFox Handheld Microwave Spectrum Analyzer is a portable instrument used to examine RF and microwave signals from 3 kHz to 10 GHz. Part of the FieldFox C-Series, it brings spectrum analysis to installation sites, maintenance facilities, and laboratories, helping engineers evaluate signals and troubleshoot wireless equipment.

Its main function is measuring and displaying signal strength across a selected frequency range. Technicians can identify transmissions, measure their frequencies and amplitudes, and examine unwanted emissions such as harmonics. These measurements help investigate interference, excessive noise, and signal problems that can reduce communication system performance.

With optional real-time spectrum analysis, the N9935C captures changing or intermittent signals within an analysis bandwidth of up to 120 MHz, depending on installed options. Density spectrum and spectrogram displays show how signal activity varies over time, helping users detect brief transmissions and investigate interference that conventional swept measurements may miss.

Additional options enable over-the-air measurements of LTE and 5G NR signals within the analyzer’s frequency coverage. GPS/GNSS support provides location information and timestamps for documenting field measurements. These capabilities help technicians compare signal conditions across sites and verify wireless network operation. Available functions depend on the installed licenses and accessories.

The N9935C’s durable handheld design makes it practical for measurements directly at installed equipment. Keysight specifies spectrum amplitude accuracy of ±0.15 dB under stated conditions without requiring warmup, helping technicians begin work quickly. Its software-defined platform also supports upgrades, allowing users to add supported measurement capabilities as their testing needs develop.

Features:

• Frequency coverage: 3 kHz to 10 GHz.
• Standard spectrum analysis: Measures signal amplitude across frequencies to examine transmissions, harmonics, and interference.
• Optional real-time spectrum analysis: Captures intermittent signals with up to 120 MHz of analysis bandwidth.
• Density spectrum and spectrogram displays: Reveal signal activity over time with the real-time analysis option.
• Bandwidth upgrades: Supports 10, 40, or 120 MHz real-time analysis bandwidth, depending on configuration.
• Amplitude accuracy: ±0.15 dB under specified conditions, without requiring warmup.
• Optional LTE and 5G NR testing: Supports over-the-air measurements within its frequency coverage.
• GPS/GNSS support: Enables location tagging and measurement timestamps with the appropriate configuration.
• IQ streaming: Supports up to 1 MHz streaming bandwidth with the required options.
• Software upgrades: Allows supported measurement capabilities to be added through licenses.
• Portable, durable construction: Designed for field measurements, maintenance, and troubleshooting.