The 8481D diode power sensor is designed for use with the EPM series, EPM-P series, 70100A, E1416A and the 43x power meters, and provides extraordinary accuracy and stability.
The 11708A 30 dB attenuator is supplied with 8480 series power sensors with the "D" suffix, for calibration with the power meter 0 dBm, 50 MHz reference.