Agilent/Keysight P9371A

The Keysight P9371A is a 2-port USB vector network analyzer for RF and microwave component characterization across 300 kHz to 6.5 GHz. This compact, PC-controlled instrument delivers dynamic range exceeding 115 dB at 6.5 GHz with trace noise below 0.003 dBrms, making it suitable for passive component testing, wireless manufacturing, and design validation. The faceless USB form factor conserves bench space while maintaining measurement science consistent with Keysight's higher-performance VNAs.

Technical Specifications

• Operating Range: 300 kHz to 6.5 GHz


• Dynamic Range: >115 dB at 6.5 GHz (10 Hz IFBW); 95–122 dB across band; >114 dB at 9 GHz


• Trace Noise: <0.003 dBrms (1 kHz IFBW)


• Directivity: 31 to 52 dB


• Noise Floor: −108 to −98 dBm


• Harmonics: −11 to −6 dBc


• Temperature Stability: 0.005 dB/°C to 4.5 GHz Measurement Speed & Resolution


• Full 2-port calibrated sweep: 24 ms (201 points, 100 kHz IFBW)


• Sweep Speed: 14 ms


• IF Bandwidth: 10 Hz minimum


• Frequency Resolution: 1 to 3 Hz Ports & Power


• Configuration: 2-port, 50 Ω S-parameter


• Connectors: 3.5 mm (female)


• Output Power: 0 to 10 dBm


• Power Sweep Range: −40 to 7 dBm Physical & Environmental


• Dimensions: 48 × 178 × 337 mm


• Weight: 2.04 kg (4.5 lbs)


• Operating Temperature: 0 to 55 °C


• Interface: USB 3.0 (PC-controlled)

Key Features

• Automatic fixture removal and time domain analysis via optional software


• Scalar calibrated mixer/converter and multiport measurements


• Mixed-mode S-parameter support


• Compatible with all Keysight mechanical calibration kits and ECal modules (including N755X Series Economy units)


• Extensible to 4-port configuration by cascading two P937xA modules with appropriate accessories

Typical Applications Aerospace and defense component testing, telecommunications passive component characterization, wireless manufacturing quality assurance, and design validation in light-manufacturing environments.

Compatibility & Integration Requires Windows 7 or Windows 10 (32/64-bit), 1.5 GHz dual-core processor minimum (2.4 GHz recommended), 1 GB RAM minimum (8 GB recommended), and Keysight IO Libraries Suite 2021 or greater.