• Description
  • Options

Product Features

    Cable and Antenna Analyzer (CAT), Vector Network Analyzer (VNA)

    • 300 kHz to 44 GHz
    • Dynamic range: 70 - 100 dB
    • CAT:  return loss/distance-to-fault
    • VNA:  Full 2-port vector network analyzer

    Spectrum Analyzer

    • 5 kHz to 44 GHz
    • provides best amplitude accuracy of 0.5 dB, with no warm up required
    • Spur-free dynamic range: > 104 dB

    Key features

    • Built-in power meter
    • Independent signal generator
    • Vector voltmeter
    • Interference analyzer
    • Pulse measurements
    • Built-in variable DC voltage source
    • Frequency counter measurements
    • TDR cable measurements
    • Built-in GPS receiver
    • ECal support
    • Extended range transmission analysis
    • Three-year warranty

    FieldFox 30-second video introducing real time spectrum analysis (RTSA)

    Keysight N9951A (CAT) tester
    Work better and faster in radar installation and maintenance.

    Delivers Benchtop Accuracy and MIL-Spec Durability to Field Applications
    The N9951A 44 GHz FieldFox microwave analyzer base function is a cable and antenna analyzer and can be configured to include a spectrum and full 2-port network analyzer. To save space in a field kit, built-in capabilities can be added to provide up to 10 instruments in 1. The N9951A can be ordered with additional capabilities: power meter, independent signal generator, vector voltmeter, interference analyzer, variable DC source, and built-in GPS receiver.

    Fifty to sixty percent of microwave-link equipment issues are related to cables, antennas and connectors. Degraded feeder lines cause poor coverage, link failures, and reduced sensitivity in the receive path. To maintain the quality of a microwave link, it is critical to keep cable and antenna systems in good working condition. FieldFox Cable and Antenna Analyzers are uniquely qualified to provide all the necessary measurements to troubleshoot and maintain these systems.

    Product highlights:

    • Meets MIL-PRF-28800F Class 2, no vents or fans, wide operating temp of −10 to +55°C (14 to 131°F)
    • Meets IEC/EN 60529 IP53 requirements
    • Meets Procedure 1 requirements for operation in explosive environments. MIL-810G, Method 511.5
    • Portable: compact, light-weight 3.2 kg/7.1 lb package
    • VNA CalReady allows quick and accurate microwave device measurements in the field
    • Built-in microwave independent signal source with flattened power output
    • Full-band tracking generator

    Keysight BenchVue SoftwareKeysight BenchVue Software for the PC
    This free software option from Keysight offers engineers and technicians involved in design and validation an easy and intuitive way to accelerate testing with no programming necessary. Multiple instrument measurement visibility and data capture improves the way users interact with their instruments and the entire bench. BenchVue provides easy viewing, capturing and exporting of data and screen shots. Visit the BenchVue Product Page for more information including instrument compatibility.

    Noise Figure Analyzer Mode (Opt. 356)
    Expanding measurement capabilities include noise figure analyzer mode — a key performance parameter in many RF systems. FieldFox can characterize the noise figure of devices including low noise amplifiers (LNAs), frequency converters and receivers using the industry proven Y-factor technique. By combining noise figure measurements with full 2-port vector network analysis, spectrum analysis and power sensor integration, FieldFox can now provide complete characterization of amplifiers and converters in the field or repair depots.

    included: AC/DC adapter, one (1) battery, soft carrying case, LAN cable, quick reference guide and user's guide.

    Manufacturer Model Description
    Keysight Opt. 030 Remote Control Capability Remotely-control FieldFox Analyzer via an iOS device such as an iPad or iPhone.
    Keysight Opt. 310 Built-in Power Meter Facilitates very accurate channel power measurements.
    Keysight Opt. 309 DC Bias Variable-Voltage Source
    Keysight Opt. 308 Vector Voltmeter Easily characterize the difference between two measurements
    Keysight Opt. 307 GPS Receiver Provides geo-location data
    Keysight Opt. 302 USB Power Sensor Support Allows for absolute power measurements
    Keysight Opt. 236 Interference Analyzer and Spectrogram
    Keysight Opt. 235 (N9951A 235) Pre-amplifier Full band; nominal gain 20 dB
    Keysight Opt. 233 (N9951A 233) Spectrum Analyzer
    Keysight Opt. 211 (N9951A 211) Vector Network Analyzer full 2-port S-parameters Requires Option 210
    Keysight Opt. 210 (N9951A 210) Vector Network Analyzer Transmission/Reflection
    Keysight Opt. 010 Vector Network Analyzer Time Domain Allows simultaneous frequency domain and time domain measurements. Requires Option 210.
    Keysight Opt. 330 Pulse Mode Support of U202x peak power sensor to characterize pulse profiling, like rise, fall and width, etc.
    Keysight Opt. 208 External USB Power Measurement vs Frequency Allows the use the external USB power sensor and internal signal source to make frequency offset measurements that evaluate frequency converter performance like loss, gain and bandwidth. Requires Option 302.
    Keysight Opt. 212 One-port Mixed Mode S-parameter Allows measurement of one-port S- parameters for differential devices, like PCB, twisted pair cables, and amplifiers with differential inputs. Requires Options 210 and 211.
    Keysight Opt. 215 TDR Cable Measurements Adds a TDR display in CAT mode. Allows measurement of impedance changes along the cable length to identify specific cable faults.
    Keysight Opt. 209 Extended Range Transmission Analysis (ERTA) Allows measurement of very long microwave cable losses which cannot be done by traditional cable and antenna testers or VNAs. Option 209 is a system based on two FieldFox units.
    Keysight Opt. 238 Spectrum Analyzer Time Gating
    Keysight Opt. 312 Channel Scanner Requires Option 233.
    Keysight Opt. 355 Analog Demodulation Verifies AM/FM transmitter performance and troubleshoots potential hardware issues with transmitters such as 2-way and airport traffic control radios.
    Keysight Opt. 350 Real Time Spectrum Analyzer Requires Option 233.
    Keysight Opt. 351 I/Q Analyzer Mode Provides frequency and time domain measurements and customizable multi-domain display views.
    Keysight Opt. 356 Noise Figure Measurement Uses Y-factor technique to accurately verify and characterize amplifier and frequency converter noise figure. Requires spectrum analyzer mode (Option 233 on combination models), preamplifier (Option 235) and DC bias variable voltage source (Option 309) as well as CPU2 processor. An external noise source like Keysight 346A/B/C/K40/K01 is also required. Also recommended to improve accuracy is an external preamplifier (U7227A/C/F or U7228A/C/F).
    Keysight Opt. 377 5GTF Over-the-Air Mode 5GTF OTA: Used by Verizon Wireless, can measure PSS, SSS and decode cell ID. Requires spectrum analyzer mode (Option 233 on combination models), GPS receiver (Option 307) as well as the CPU2 processor. Also recommended, but not required, is preamplifier (Option 235) to improve receiver sensitivity.