Automatic calibration and zeroing Frequency entry instead of calibration factor Ten pre-loaded sensor calibration factor versus frequency tables Selectable resolution to 0.001 dB Offset entry in dB Duty-cycle entry for a convenient peak power representation of the measured average power Ten store/recall registers Uses 8480 Series Power Sensors GPIB Interface The Keysight 437B power meter is a low-cost, high-performance, single-channel, programmable, average power meter compatible with the 8480 family of power sensors. Depending on which power sensor is used, the 437B can measure from -70 dBm (100pW) to +44 dBm (25W) at frequencies from 100 kHz to 110 GHz.