Agilent/Keysight 84812A

The Agilent/Keysight 84812A is a peak power sensor engineered for precise power measurements across microwave and millimeter-wave frequencies. Built on balanced Planar Doped Barrier (PDB) diode sensing elements paired with a wideband, high dynamic range amplifier, this sensor delivers fast system risetime and measurement accuracy across demanding RF applications. Integrated automatic temperature sensing and correction maintains measurement integrity across varying thermal conditions.

Technical Specifications

• Frequency Range: 500 MHz to 18 GHz


• Power Range: −33 dBm to +20 dBm


• Dynamic Range: −32 dBm to +20 dBm (usable to −40 dBm)


• Standing Wave Ratio (SWR): 1.25


• Connector: N-type (male)

Key Features

• Balanced Planar Doped Barrier (PDB) diode sensing elements for stable, wide dynamic range performance


• Wideband amplifier architecture enabling fast measurement response


• Automatic temperature sensing and correction circuitry for thermal stability


• Direct compatibility with legacy Keysight peak power analyzers and P-Series power meters

Typical Applications The 84812A suits RF and microwave power measurement in research, development, and production environments where broadband frequency coverage and dynamic range are essential. Its performance envelope accommodates both CW and modulated signal characterization from 500 MHz through 18 GHz.

Compatibility & Integration This sensor integrates with obsolete Keysight 8990A and 89911A Peak Power Analyzers, as well as the 8992A Digital Video Power Analyzer. P-Series power meters also provide backward compatibility with 8480 series sensors; adapter cables such as the N1917A may be required for connection. Adapter solutions - including the 11901C (2.4 mm male to APC-3.5 female) and 83059 series adapters - support alternate connector requirements. Product Status: Obsolete. Keysight has designated this product end-of-life with no direct replacement identified.