Agilent/Keysight 85025D

The Keysight/Agilent 85025D is a 50 ohm coaxial detector engineered for RF and microwave signal measurement across 10 MHz to 50 GHz. It detects both AC (modulated) and DC (unmodulated) signals, making it suitable for diverse measurement scenarios in scalar network analysis. The detector incorporates internal frequency correction factors stored in EEPROM to maintain measurement accuracy across its full operating range.

Technical Specifications

• Frequency Range: 10 MHz to 50 GHz


• Input Impedance: 50 ohms


• Input Connector: 2.4 mm male


• Detection Modes: AC and DC


• Dynamic Range (AC Mode): +16 dBm to -55 dBm


• Dynamic Range (DC Mode): +16 dBm to -50 dBm


• Weight: 3 lb

Key Features

• Dual-mode detection supports both modulated and unmodulated microwave signals


• On-board EEPROM stores frequency-dependent correction coefficients for enhanced accuracy


• Maximum absolute power measurement accuracy when paired with the 8757D's internal power calibrator (Option 002)


• Service notes and connector repair kits available from manufacturer

Typical Applications

• Scalar network analysis and RF power measurement


• Microwave signal detection from 10 MHz to 50 GHz


• AC and DC signal characterization in test and measurement systems

Compatibility & Integration The 85025D is designed as a primary detector for the Keysight 8757D Scalar Network Analyzer. It is not compatible with the 8756 or 8755 models. Integration with the 8757D's calibration functions optimizes absolute power measurement capability.