Keysight 478A-H76 Coaxial Thermistor Mount

Overview

The Keysight 478A-H76 is a frequency-variant option of the Keysight 478A thermistor mount, extending the frequency range down to 1 MHz while maintaining high-accuracy power measurement characteristics. This model includes standard laboratory calibration at 50 MHz, the most common RF measurement frequency, providing verified accuracy for routine power measurements. The thermistor element is temperature compensated and calibration is NIST-traceable.

Key Features

• Extended frequency range: 1 MHz to 1 GHz
• Maximum SWR: 1.3 overall, 1.05 at 50 MHz for optimal accuracy at standard measurement frequency
• Standard laboratory calibration at 50 MHz included
• Temperature-compensated thermistor for low drift
• Can measure microwave power as low as 1 microwatt
• NIST-traceable calibration
• High RF match efficiency for accurate measurements

Applications

• Low-frequency RF power measurement (1 MHz - 1 GHz)
• Power meter calibration and verification at 50 MHz
• RF component testing in the HF and VHF bands
• Communications and measurement system verification