Agilent/Keysight P9377B

The Keysight P9377B is a compact, 2-port vector network analyzer designed for RF and microwave characterization from 100 kHz to 44 GHz. This faceless, PC-controlled instrument connects via Thunderbolt 3 to an external Windows 10 computer, eliminating bench clutter while preserving the measurement science, GUI, and SCPI command compatibility of Keysight's PNA Series VNAs. The P9377B delivers full S-parameter capability with 0.0015 dB rms trace noise (10 kHz IFBW) and a noise floor of −107 dB across its frequency span.

It supports 2.4 mm female connectors and produces 8 dBm output power, making it suitable for passive component characterization and advanced time-domain analysis.

Technical Specifications

• Frequency Range: 100 kHz to 44 GHz


• Ports: 2-port configuration with 2.4 mm female test connectors


• Trace Noise: 0.0015 dB rms (10 kHz IFBW)


• Noise Floor: −107 dB


• Frequency Resolution: 1 Hz


• Output Power: 8 dBm


• Dimensions: 48 × 176 × 333 mm


• Weight: Less than 2 kg


• Operating Temperature: Applies over 25 °C ± 5 °C range after 60-minute warm-up

Key Features

• Full S-parameter measurement capability


• Enhanced Time Domain Analysis (TDR/TDT) with optional software modules (S97010B, S97011B)


• Automatic fixture removal


• Electronic Calibration (ECal) module support


• Cascading capability to extend test ports


• 1 Hz frequency resolution


• Fanless, compact design

Typical Applications

• Passive component characterization (filters, couplers, attenuators)


• High-speed data measurements including eye-diagram and mask-mode analysis


• Time-domain reflectometry and transmission


• Multi-site or shared laboratory configurations

Compatibility & Integration

• Primary Interface: Thunderbolt 3


• Secondary Interfaces: USB, MCX connectors


• Host OS: Windows 10 (64-bit), Version 1909 or later


• Command Control: Full SCPI command set compatible with PNA Series VNAs


• Measurement Science: Aligned with Keysight PNA architecture