Keysight (Agilent) 8720E Vector Network Analyzer, 50MHz-20GHz

The Keysight (Agilent) 8720E Vector Network Analyzer operates across 50 MHz to 20 GHz, delivering S-parameter, time-domain, and power measurements for RF and microwave component characterization. Its fully synthesized source provides swept and stepped frequency modes with 1 Hz resolution and 10 ppm stability. The instrument features integrated solid-state switching S-parameter test sets with full two-port error correction, tuned receiver architecture, and configurable direct sampler access. Two independent measurement channels drive four display channels, supporting magnitude, phase, group delay, Smith chart, polar, SWR, and time-domain formats. Dynamic range reaches 100 dB as standard, expandable to 104–105 dB with specific configurations. A 55 dB step attenuator spans output power range, while selectable IF bandwidth from 6 kHz to 10 Hz accommodates diverse measurement scenarios. The 8720E handles full two-port calibration, adapter-removal techniques, enhanced response calibration, and optional TRL calibration. Weighted sweep-to-sweep averaging, power and frequency sweep modes, pass/fail testing, and internal test sequencing automation enable efficient production and lab workflows. Standard 3.5 mm (NMD 3.5 male) connectors support modular test set configurations. Optional mechanical transfer switching increases test port power and dynamic range by 5 dB.

– Technical Specifications

• Frequency Range: 50 MHz to 20 GHz
• Dynamic Range: 100 dB (standard); 104–105 dB with specific configurations; +5 dB gain with Option 007
• Output Power: +5 dBm (standard)
• Test Ports: 3.5 mm NMD 3.5 male connector
• Frequency Resolution: 1 Hz (Option 001)
• Source Frequency Stability: 10 ppm (typical)
• Attenuator: 55 dB step attenuator
• IF Bandwidth: 6 kHz to 10 Hz (selectable)
• Measurement Channels: 2 independent
• Display Channels: 4
• Display Formats: Magnitude, phase, group delay, Smith chart, polar, SWR, time-domain

– Key Features

• Fully synthesized source with swept and stepped modes
• Integrated two-port error correction test sets
• Tuned receiver with optional direct sampler access (Option 012)
• Multiple calibration techniques: full two-port, adapter-removal, enhanced response, TRL (optional), one-port response
• Weighted sweep-to-sweep averaging
• Power and frequency sweep capabilities
• Pass/fail testing and marker functions
• Internal test sequencing automation
• Mechanical transfer switch option (Option 007) for increased dynamic range
• Time-domain measurements (Option 010)

– Typical Applications

• Filter and amplifier characterization
• Cable and antenna testing
• Component S-parameter analysis
• Frequency response measurement

– Compatibility & Integration

3.5 mm test port configuration supports standard RF coaxial accessories and adapter networks.