Agilent/Keysight N9951B
The Agilent/Keysight N9951B is a portable microwave spectrum analyzer offering a frequency range of up to 50 GHz. It combines spectrum analysis, cable and antenna testing, and power measurements in a single instrument, ideal for field testing and maintenance.
- Model
- Agilent / Keysight N9951B
- Calibration
- Available on request
- Price
- $10,590
- Status
- In stock
- RFQ ref
- N9951B
This unit
The Keysight N9951B FieldFox is a handheld microwave combination analyzer engineered for field deployment in aerospace, defense, and wireless communications environments. This ruggedized 3.4 kg instrument integrates spectrum analysis, cable and antenna testing, and power measurements into a single platform. The N9951B operates across 9 kHz to 44 GHz (spectrum analysis) and 300 kHz to 44 GHz (cable/antenna), with optional vector network analysis extending capability to 44 GHz.
The base unit delivers spectrum measurements accurate to ±0.2–0.3 dB without warm-up and supports real-time bandwidth to 120 MHz gap-free analysis. Built-in ports number two; system dynamic range reaches 105 dB.
Technical Specifications
Physical & Environmental- Weight: 3.4 kg (7.4 lb)
- Operating temperature: −10 to +55 °C
- IP rating: IP53 per IEC/EN 60529
- Ruggedness: MIL-PRF-28800F Class 2 and MIL-STD-810G Method 511.5 for explosive environments Frequency Coverage
- Spectrum analyzer: 9 kHz to 44 GHz
- Cable/antenna analyzer: 300 kHz to 44 GHz
- Over-the-air analysis: 1 MHz to 44 GHz (usable to 5 kHz) Measurement Performance
- Spectrum analysis accuracy: ±0.2–0.3 dB (no warm-up required)
- Real-time bandwidth: 120 MHz gap-free
- Minimum signal duration for 100% POI at full amplitude: 5.52 µs
- VNA dynamic range: 105–115 dB (optional)
Key Features
- Two-port vector network analysis with simultaneous S-parameter measurement (optional)
- Cable and antenna testing with DTF, return loss, and VSWR measurements
- Built-in time-domain reflectometry (TDR) via option
- Over-the-air capabilities for 5G NR and LTE
- Optional noise figure measurements
- Independent signal generator
- Integrated GPS/GNSS receiver for geolocation and timestamping
- Calibration methods: CalReady, OSL, Response, Enhanced Response
- Vector voltmeter functionality
Typical Applications
- Field RF and microwave testing
- Cable and transmission line characterization
- Antenna performance verification
- 5G signal analysis
- Interference detection and analysis
- Network parameter verification in aerospace and defense
Compatibility & Integration The N9951B accepts software options to enable advanced functions including vector network analysis, time-domain reflectometry, pulse measurement, and extended-range transmission analysis. Analog demodulation and spectrogram capabilities are available through configuration. The instrument's dual-port architecture supports mixed-mode S-parameter measurements and vector voltmeter operation.
Specifications
| Parameter | Value |
|---|---|
| Frequency Range | 9 kHz to 44 GHz (spectrum analyzer) |
| 5 kHz to 54 GHz (real-time spectrum analyzer) | Power Range (dBm) | −163 dBm @ 2 GHz |
Agilent / Keysight N9951B — Repair & Calibration Service
Aumictech offers NIST-traceable calibration and repair for the Agilent / Keysight N9951B. All calibrations are performed to NIST-traceable standards and ship with a certificate. Turnaround is typically 1–3 business days after receipt.
Agilent / Keysight N9951B price
This Agilent / Keysight N9951B is listed at $10,590. Calibration is available separately from $450. Contact us for volume pricing or if you need multiple units.
Agilent / Keysight N9951B calibration cost
NIST-traceable calibration for the Agilent / Keysight N9951B is $450 (standard — pass/fail certificate and calibration sticker) or $650 (full measured data at every test point, reference standards documented, traceability chain included). Turnaround is 1 to 3 business days after receipt. See full calibration details →
