Agilent/Keysight 8503A

The Agilent/Keysight 8503A is an S-parameter test set for accurate characterization of RF and microwave components operating from DC to 18 GHz. Designed for use with network analyzers, it enables precise measurement of scattering parameters (S11, S21, S12, S22), impedance, and reflection coefficients across its full frequency range. The 8503A delivers 80 dB dynamic range and handles up to 1 W of RF power with 50 ohm impedance, achieving typical return loss exceeding 30 dB and insertion loss below 0.2 dB. Its compact footprint (220 mm × 220 mm × 100 mm, ~2 kg) makes it suitable for both laboratory and field deployment.

– Technical Specifications

• Frequency range: DC to 18 GHz
• Measurement parameters: S11, S21, S12, S22
• Impedance: 50 ohms
• Connector type: 3.5 mm female
• Dynamic range: Up to 80 dB
• Power handling: Up to 1 W
• Return loss: Typically > 30 dB
• Insertion loss: Typically < 0.2 dB
• Operating temperature: 0°C to 50°C
• Dimensions: 220 mm × 220 mm × 100 mm
• Weight: Approximately 2 kg

– Key Features

• Wide frequency coverage extending to 18 GHz enables characterization across multiple RF/microwave bands
• High dynamic range of 80 dB supports measurement of components with wide variations in reflection and transmission
• Low insertion loss minimizes test set contribution to measurement uncertainty
• Superior return loss ensures minimal signal corruption during S-parameter acquisition

– Typical Applications

• Component characterization and quality assurance
• System-level diagnostics
• Signal integrity testing

– Compatibility & Integration

The 8503A integrates with network analyzers equipped for S-parameter measurement. General calibration kit compatibility extends to Keysight network analyzers supporting frequencies to 50 GHz with 2.4 mm connectors and to 6 GHz with 7 mm connectors.

Legacy Status: Discontinued product. Operating and Service Manual 08503-90001 last revised August 1978.