Agilent / Keysight 85037A Precision Detector, 10 MHz to 18 GHz

The Agilent/Keysight 85037A is a precision detector engineered for scalar network and power measurement applications across 10 MHz to 18 GHz. Designed specifically for the Agilent 8757D scalar network analyzer, this detector delivers enhanced accuracy through detector-specific frequency response data stored in internal EEPROM, automatically read and applied by the 8757D during operation. It supports both AC and DC detection modes and achieves maximum absolute power measurement accuracy when paired with the 8757D's internal power calibrator (Option 002).

Technical Specifications

Frequency Range: 10 MHz to 18 GHz Dynamic Range:

• AC Mode: +20 to −55 dBm


• DC Mode: +20 to −50 dBm DC Absolute Power Accuracy (25 ±5 °C, 50 MHz, calibration and measurement at same temperature):


• With 8757D Option 002 calibrator: ±0.25 dB at +20 dBm; ±0.11 dB at +10 dBm


• Without calibrator: ±0.40 dB at +20 dBm; ±0.40 dB at +10 dBm Temperature Coefficient of Linearity: 0.01 dB/°C after calibration Connectors: Type-N male standard; 7 mm precision connector available (Option 001)

Key Features

• Internal frequency correction via EEPROM-stored detector-specific calibration data


• AC and DC detection modes for flexible measurement capability


• Automatic frequency response correction when used with compatible 8757D analyzer


• Achievable power measurement accuracy of ±0.11 dB with 8757D Option 002 calibrator

Typical Applications

• Scalar network analysis


• Absolute power measurement


• RF and microwave power detection

Compatibility & Integration The 85037A integrates exclusively with the Agilent 8757D scalar network analyzer. It is not compatible with earlier 8757A, 8757C, 8757E, 8756, or 8755 scalar network analyzer models. Optimal absolute power measurement accuracy requires use of the 8757D's internal power calibrator (Option 002).