Agilent/Keysight 8484A

The Agilent/Keysight 8484A is a high-sensitivity diode power sensor engineered for precise low-power measurements across RF and microwave frequencies. Operating from 10 MHz to 18 GHz, it measures power levels as low as 0.1 nW, making it essential for calibration and performance verification in test setups requiring detection of extremely weak signals.

Technical Specifications

• Frequency Range: 10 MHz to 18 GHz


• Power Measurement Range: −70 dBm to −20 dBm (0.1 nW to 10 µW)


• Maximum RF Power Input: 200 mW (average or peak)


• Maximum DC Voltage to RF Input: 20 V


• RF Impedance: 50 ohms nominal


• RF Connector: Type N Male (military specification)


• SWR Performance: - 1.40 (reflection coefficient 0.167) from 10 MHz to 30 MHz - 1.15 (reflection coefficient 0.070) from 30 MHz to 4 GHz - 1.20 (reflection coefficient 0.091) from 4 GHz to 10 GHz


• Calibration: Individual calibration graph and table, NBS/NIST traceable, provided with each sensor


• Noise and Drift: Less than 5% of full scale on the 300 pW range (approximately 15 pW) with HP 435B power meter; superior performance with HP 436A, 437B, and 438A


• Dimensions: 36 mm wide × 44 mm high × 133 mm long (1-7/16 × 1-3/4 × 5-1/4 in.)


• Weight: 0.4 kg (13 oz.)

Key Features

• Broad measurement dynamic range from femtowatts to microwatts


• Low reflection coefficient across critical frequency bands


• Includes HP 11708A 30 dB Reference Attenuator for 1 mW reference calibration


• Military-grade Type N connectors for rugged field deployment


• Compact form factor suited to system integration

Typical Applications

• Low-power RF component characterization


• Microwave system calibration and alignment


• Detector linearity verification


• Power meter reference standards

Compatibility & Integration The 8484A interfaces with Agilent/Keysight power meters: EPM series (E4418A, E4418B, E4419A, E4419B), EPM-P series, P-series, 70100A, E1416A, 435A/B, 436A, 437A/B, and 438A.