Agilent/Keysight E9304A-H18

The Keysight E9304A-H18 is an E-Series average power sensor delivering accurate measurements across 9 kHz to 18 GHz with extended upper frequency capability via Option H18. This DC-coupled sensor spans -60 dBm to +20 dBm and employs dual independent measurement paths - low power (-60 to -10 dBm) and high power (-10 dBm to +20 dBm) - with automatic selection and hysteresis to prevent mode switching artifacts. The sensor accommodates up to 5 Vdc without diode damage and supports peak power measurements to +33 dBm (< 10 μsec pulse width) with continuous average rating to +25 dBm.

Calibration factor uncertainty ranges from ±1.7% to ±2.2% across the low power path depending on frequency band and temperature, with high power path uncertainty from ±1.8% to ±3.4%. The N-type male connector integrates with Keysight EPM, EPM-P, and P-Series power meters for automated system operation.

Technical Specifications

• Measurement Type: Average Power


• Frequency Range: 9 kHz to 18 GHz


• Power Range: -60 dBm to +20 dBm


• Maximum Average Power: +25 dBm (320 mW)


• Maximum Peak Power: +33 dBm (2 W) for pulses < 10 μsec


• Connector: N-type (male)


• DC Coupling: Yes; maximum 5 Vdc applicable without damage


• Dual Measurement Paths: Automatic selection between high power (-10 to +20 dBm) and low power (-60 to -10 dBm) ranges with hysteresis

Key Features

• Low-frequency coverage from 9 kHz enables VLF and EMC/EMI characterization


• Calibration factor uncertainty ±1.7% to ±2.2% (low power path, 25°C ±10°C)


• Temperature-compensated operation from 0°C to +55°C


• Dual independent signal paths prevent measurement discontinuities near switching threshold

Typical Applications

• Very low frequency (VLF) power measurements


• EMC/EMI radiated immunity testing per IEC 61000-4-3


• Radiated field uniformity calibration and validation


• Transmitter power and receiver sensitivity characterization from VLF through microwave bands

Compatibility & Integration Fully compatible with Keysight EPM Series (N1913A/14A, E4418B/19B), EPM-P Series (E4416A/17A), and P-Series (N1911A/12A) power meters for integrated measurement systems.