Additional Features: 28 GHz of unfiltered optical bandwidth 10Gb/s reference receiver for OC-192/STM-64 standard-based compliance testing 40 GHz electrical channel The Agilent 86106B, Optical Plug-In Module, that has an integrated, calibrated optical channel with a built-in OC-192/STM-64 filter that can be switched in for a standards-base transmitter compliance test. When the filter is switched out, the 86106B offers 28 GHz of unfiltered optical bandwidth for accurate characterization of high-speed lasers. The frequency-response variation of the unfiltered optical channel also has been improved to minimize the distortion on measured optical pulses. A 40 GHz electrical channel is available for wide-bandwidth measurements on electrical waveforms.