Agilent/Keysight M9805A

The Keysight M9805A is a PXIe Vector Network Analyzer delivering RF characterization across 100 kHz to 26.5 GHz. This two-port module employs the same measurement science as Keysight's PNA and ENA series, ensuring consistency across platforms. Purpose-built for multiport applications, the M9805A cascades within a single chassis to support up to 34 ports, or scales across multiple chassis for configurations up to 50 ports.

All test ports operate synchronously with full N-port error correction, enabling simultaneous measurements on complex device networks.

Technical Specifications

• Frequency Range: 100 kHz to 26.5 GHz


• Native Port Configuration: 2 ports per module


• Multiport Scalability: Up to 34 ports (single chassis), up to 50 ports (multiple chassis)


• Temperature Stability: 0.005 dB/°C typical


• Harmonics: −25 dBc typical


• Corrected Error Terms (Mechanical Calibration - 85058B kit):

Directivity: ±0.019 dB (100 kHz–1 MHz), ±0.01 dB (2–10 GHz)

Source/Load Match & Reflection Tracking: ±0.019 dB (100 kHz–1 MHz), ±0.033 dB (10–20 GHz)

Transmission Tracking: ±0.302 dB (100 kHz–1 MHz), ±0.033 dB (2–10 GHz)

Corrected Error Terms (Electronic Calibration

N4694D module):

Directivity: ±0.08 dB (100 kHz–1 MHz), ±0.04 dB (2–20 GHz)

Source/Load Match & Reflection Tracking: ±0.08–0.06 dB (100 kHz–1 MHz), ±0.05–0.06 dB (2–20 GHz)

Transmission Tracking: ±0.148 dB (100 kHz–1 MHz), ±0.065 dB (2–20 GHz)

Key Features

• PXI VNA dynamic range, measurement speed, trace noise, and temperature stability


• Fully synchronous multiport architecture with simultaneous measurement capability


• Fast multiport calibration via electronic calibration (ECal) modules


• N-port error correction for accurate passive and active device characterization

Typical Applications

• Passive component characterization (filters, couplers, transformers)


• Amplifier and mixer measurements


• Frequency converter analysis


• Multiport device testing requiring synchronized measurements

Compatibility & Integration Leverages Keysight measurement science platform consistency with PNA, ENA, and Streamline Series VNAs. Supports industry-standard ECal modules for rapid field calibration.