Fast Optical Power Sensor, 1250-1640nm, +10 to -80dBm Agilent / HP (now Keysight) 81636B Interface Module, Optical Power Sensor, 1250 to 1640 nm, +10 to -80 dBm: Up to 100,000 samples can be taken with short averaging time and high bandwidth to provide undistorted high-resolution spectra at high sweep speeds, even over narrow filters Ttraceability to NIST and PTB for measurements referenced to internationally accepted Standards Comprehensive sampling and triggering concept (hardware trigger lines, filtering, event trigger, hardware timer, analog output) 25 µs minimum averaging time and 17 kHz analog bandwidth Dynamic range > 55 dB in manual range mode Power uncertainty of +/- 3% Low polarization dependence of < +/- 0.015 dB 100,000 measurement samples