Agilent/Keysight P9373A

The Keysight P9373A is a compact, PC-controlled USB Vector Network Analyzer delivering RF and microwave measurements from 300 kHz to 14 GHz. Part of Keysight's Streamline Series, this two-port VNA combines trusted measurement science with a portable, cost-effective design suitable for manufacturing test, component evaluation, and field deployment across wireless, aerospace, and defense applications.

Technical Specifications

• Frequency Range: 300 kHz to 14 GHz


• Ports: 2 (expandable to 4 with compatible modules)


• Port Connectors: 3.5 mm, SMA, SMB (female variants available)


• Port Impedance: 50 Ohms


• Dynamic Range: >115 dB at 6.5 GHz (10 Hz IFBW)


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


• Temperature Stability: 0.005 dB/°C up to 4.5 GHz


• Directivity: Below 52 dB


• Output Power: 0 to 10 dBm


• Power Sweep Range: −40 to 7 dBm


• Noise Floor: −108 to −98 dBm


• Harmonics: −14 to −6 dBc


• IF Bandwidth: 10 Hz


• Frequency Resolution: 1 to 6 Hz


• Measurement Speed: 24 msec (201 points, full 2-port calibration, 100 kHz IFBW)


• Dimensions: 176 × 48 × 333 mm


• Weight: 1.9 kg

Key Features

• USB 3.0 control interface; PC-based operation via Keysight software


• Measurement science and GUI consistent with Keysight's higher-end VNAs


• Supports all Keysight Electronic Calibration (ECal) modules and mechanical calibration


• Compact benchtop form factor enables portability between test locations

Typical Applications

• Manual test of passive components: antennas, filters, cables, connectors, adapters


• Wireless component manufacturing test


• Aerospace/defense manufacturing test


• Design validation in classified environments


• Light-manufacturing applications

Compatibility & Integration Requires Keysight IO Libraries Suite (2021 or later) and P937xA firmware on the host PC. Port expansion to four channels available; P937xA and P50xxA Series modules cannot be combined in multiport configurations.