Additional Features: Excellent SWR for reducing mismatch uncertainty Accurate readings of Average Power 50 MHz calibration port Accurate calibration and traceability to NIST millimeter-wave sensor calibration The Agilent R8486D diode power sensor is designed for use with the EPM, EPM-P series, 70100A, E1416A and the 43x power meters, and provides extraordinary accuracy and stability. The Agilent R8486D power sensor measures the average power over its entire -70 to -20 dBm dynamic range which gives you accurate readings even if your test signal is subjected to multitone environments, modulated carriers, or carriers with high harmonics. You also get extremely low SWR at mm-wave frequencies, and it is traceable to the U.S. National Institute of Standards and Technology (NIST). The Agilent 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.