The Keysight U8487A is a USB average power sensor delivering accurate CW RF power measurements from 10 MHz to 50 GHz. This thermocouple-based sensor measures average power across a 55 dB dynamic range (-35 dBm to +20 dBm) with linearity better than 0.8%. Onboard DC reference and switching circuits enable internal calibration without repeated connector cycles, while S-parameter and gamma correction functions compensate for impedance mismatch and component-insertion errors. The sensor streams measurements at greater than 900 readings/second and integrates real-time measurement uncertainty calculation. Power is drawn directly from the USB port (400 mA), eliminating external supply requirements. The compact design measures 127.70 mm × 4 mm × 35.90 mm and connects via 2.4 mm female connector. A standard 5 ft cable is included; 10 ft and 16.3 ft variants are available separately.
Technical Specifications
• Frequency Range: 10 MHz to 50 GHz
• Measurement Type: Average Power, CW RF Signals
• Power Range: -35 dBm to +20 dBm
• Dynamic Range: 55 dB
• Power Linearity: 900 readings/second (free run/fast buffer mode)
• Current Consumption: 400 mA (USB powered)
• Operating Temperature: 0 to 55 °C
• Storage Temperature: -40 to 71 °C
• Dimensions: 127.70 mm × 4 mm × 35.90 mm
• Weight: 0.22 kg
• Connector: 2.4 mm (female)
– Key Features
• Real-time measurement uncertainty (MU) calculation
• S-parameter and gamma correction for impedance mismatch compensation
• Integrated DC reference and on-device calibration circuitry
• Direct USB power operation; no external power supply needed
• Built-in trigger-in function with BNC/SMB compatibility
• NIST/NPL-traceable calibration
– Compatibility & Integration
• BenchVue software enabled
• N1918A power panel software included; N1918A power analysis manager available separately
• Windows 10, 8, 7, Vista, XP compatible
• Works with Keysight PNA/MXG and EPM power meters (N1913B/14B, N1913A/14A)
• Standard 1.5 m USB cable included; optional 3 m and 5 m extensions available
