Agilent/Keysight 8483A

The Agilent/Keysight 8483A is a 75-ohm diode power sensor engineered for average power measurements from 100 kHz to 2 GHz across a dynamic range of 50 dB. It delivers accurate characterization of RF and microwave components and systems when connected to compatible Keysight power meters. The sensor features a thermocouple sensing element, Type-N connector, and NIST-traceable calibration for data integrity in precision measurement applications.

Technical Specifications

• Frequency Range: 100 kHz to 2 GHz


• Input Impedance: 75 ohms


• Power Range: −30 dBm to +20 dBm


• Dynamic Range: 50 dB


• Maximum Input Power: +23 dBm


• Maximum Damage Level: +33 dBm


• Sensing Element: Thermocouple


• Connector Type: Type-N


• Measurement Type: Average Power


• Power Supply: +15 VDC to +30 VDC


• Operating Temperature: 0°C to 55°C


• Dimensions: 127 mm (L) × 38 mm (W) × 100 mm (D)


• Weight: 300 g

Key Features

• Excellent SWR performance minimizes mismatch uncertainty


• NIST-traceable calibration ensures measurement confidence


• 50 dB dynamic range accommodates weak and moderately strong signals


• Supplied with mechanical adapter for 75-ohm to 50-ohm connection; impedance mismatch must be accounted for during calibration


• Compact coaxial form factor for bench and system integration

Typical Applications

• RF and microwave component characterization


• Power amplifier testing and validation


• System-level power assessment across VHF, UHF, and microwave bands

Compatibility & Integration The 8483A integrates with EPM, EPM-P, and P-Series power meters, including E4418B, E4419B, N1913A/14A, N1913B/14B, E4416A, E4417A, N1911A, and N1912A. Legacy compatibility extends to E1416A VXI meters and discontinued 70100A and 43X-series instruments (435B, 436A, 437B, 438A).