Agilent/Keysight 8720D

The Agilent/Keysight 8720D is a vector network analyzer for RF and microwave component characterization from 50 MHz to 20 GHz. It integrates a fast-sweeping synthesized source, tuned receiver, and solid-state S-parameter test set in a single instrument. The 8720D delivers measurements up to seven times faster than earlier models and supports two independent channels for simultaneous dual-measurement display.

Technical Specifications

• Operating range: 50 MHz to 20 GHz


• Frequency resolution: 1 Hz


• Frequency accuracy: 10 ppm


• Source stability: 10 ppm Dynamic Range & Power


• Dynamic range: Up to 105 dB


• Maximum output power (standard): +5 dBm (50 MHz to 20 GHz)


• Minimum output power (standard): –70 dBm (50 MHz to 20 GHz)


• Power resolution: 0.01 dB


• Power flatness: ±1.5 dB (50 MHz to 20 GHz)


• Power sweep range: 20 dB Measurement Capabilities


• Channels: Two independent measurement channels


• Measurement formats: Magnitude, phase, group delay, SWR, Smith Charts, cartesian, polar


• Error correction: Vector receiver with error correction and time domain (Option 010)


• Test set: Integrated solid-state switching S-parameter test set


• High-power measurements: Up to 20 watts with Option 085 Test Port Connectors


• 3.5 mm (13.5 GHz and 20 GHz models)


• 2.4 mm (40 GHz models) Physical & Data


• Dimensions: 222 mm (H) × 425 mm (W) × 457 mm (D)


• Net weight: 25 kg

Key Features

• Forward and reverse S-parameter measurement with single connection


• Enhanced processor enables accelerated measurement and data transfer


• Vector receiver with integrated error correction


• Available options: Mechanical transfer switch (007), time domain (010), direct sampler access (012), high-power test set (085), frequency offset mode (089), high-stability reference (1D5), 4th sampler with TRL calibration (400), and 3-port switching test set (K39)

Typical Applications Component characterization, amplifier and filter testing, impedance matching verification, transmission line analysis, and manufacturing quality assurance across R&D and production environments.

Compatibility & Integration HP-IB (IEEE 488) interface enables system automation and external control. Serial and parallel ports support improved data handling for automated test sequences.