The HP Keysight 8484A is a highly sensitive diode power sensor designed for measuring average RF and microwave power levels from -70 dBm to -20 dBm over a frequency range of 10 MHz to 18 GHz. Used with compatible HP/Keysight power meters, it provides highly accurate measurements on a 50-ohm load and includes the HP 11708A 30 dB reference attenuator for precise calibration.

Specifications

General

ParameterValue
InterfacesProprietary multi-pin power sensor connector (compatible with HP 11730-series cables)
DisplayNone (uses power meter display)
Sensor TypeHigh-sensitivity diode

Physical

ParameterValue
Power SupplyPowered by compatible power meter via sensor cable
Operating Temperature0 to 55 °C

RF Performance

ParameterValue
Frequency Range10 MHz to 18 GHz
Power Range-70 dBm to -20 dBm (100 pW to 10 µW)
Nominal Impedance50 ohms
Maximum SWR (10 MHz to 30 MHz)1.40
Maximum SWR (30 MHz to 2 GHz)1.15
Maximum SWR (2 GHz to 12.4 GHz)1.20
Maximum SWR (12.4 GHz to 18 GHz)1.25
Maximum Reflection Coefficient (10 MHz to 30 MHz)0.166
Maximum Reflection Coefficient (30 MHz to 2 GHz)0.07
Maximum Reflection Coefficient (2 GHz to 12.4 GHz)0.091
Maximum Reflection Coefficient (12.4 GHz to 18 GHz)0.111

Power Handling & Damage Limits

ParameterValue
Maximum Average Power200 mW (+23 dBm)
Maximum Peak Power200 mW (+23 dBm)

System Compatibility & Interfaces

ParameterValue
Compatible Power MetersHP 435B, 436A, 437B, 438A
Sensor Cable TypeHP 11730 series power sensor cables
Calibration Reference RequirementRequires 1 mW (0 dBm) 50 MHz reference source with 11708A 30 dB attenuator

Calibration & Accessories

ParameterValue
Included Reference AttenuatorHP 11708A 30 dB attenuator

Physical Characteristics

ParameterValue
RF Input ConnectorType-N (male)

Performance

ParameterValue
Dynamic Range50 dB (-70 to -20 dBm)

Reference Attenuator

ParameterValue
Reference Attenuator Model11708A

Technology

Diode

Applications

RF and Microwave Power Measurement