Agilent / Keysight 8514B S-Parameter Test Set 45 MHz to 20 GHz, 3.5 mm

The Agilent/Keysight 8514B S-Parameter Test Set is a coupler-based RF measurement component designed to integrate with HP 8510 network analyzers for complete two-port S-parameter characterization. Operating across 45 MHz to 20 GHz with 3.5 mm connectors, it enables simultaneous measurement of all four S-parameters (S11, S12, S21, S22) without DUT repositioning.

– Technical Specifications

Frequency Range: 45 MHz to 20 GHz

Connector Interface: 3.5 mm

Measurement Architecture: Coupler-based dual-port design with independent reference channels per incident port. Integrated four-channel RF-to-IF converters process all S-parameter signals simultaneously.

Attenuation Control: Two programmable step attenuators, 90 dB range, 10 dB steps, for incident power adjustment at both ports.

DC Bias: Two integrated bias tees enable external DC bias application to test port center conductors for active device characterization.

RF Switching: Single built-in electronic switch controls test set routing.

– Key Features

• Dual-port architecture eliminates need for DUT reorientation during S-parameter measurement
• Independent reference signal path for each incident port ensures measurement accuracy across the full 45 MHz to 20 GHz band
• 90 dB programmable attenuators with 10 dB step resolution provide fine control over incident power levels
• Bias tee integration supports active device and bias-dependent measurements
• Option 003 (High Forward Dynamic Range): Reverses Port 2 coupler to optimize forward measurement dynamic range, increasing b2 power levels—beneficial for reciprocal devices where S12 measurement priority is lower
• Option 001 (IF Switching): Enables 20 MHz IF daisy-chaining in multi-test set configurations

– Compatibility & Integration

Designed as a core component of the HP 8510 measurement system. Two 8514B test sets can be configured within a single 8510B analyzer, with front-panel selection eliminating the need for reconnection. Compatible with the 851x Series network analyzer platform. Standard 3.5 mm connectors support adaptation to alternate RF interfaces via precision adapters.