Spectrum Instrumentation has extended the M5i flagship series of high-speed PCIe digitizers, adding two new models with ultrawide bandwidths that go up to 4.7 GHz for -3 dB attenuation or even 5 GHz for -5 dB attenuation. The models M5i.3360-x16 and M5i.3367-x16 provide one and two channels respectively. Each card is capable of sampling at rates up to 10 GS/s, with 12-bit vertical resolution, specifically designed to deliver the most accurate acquisition and analysis of signals in the GHz range. The high bandwidth, combined with fast sampling, allows signals to be analysed for frequency content anywhere from DC to the Nyquist limit (half the sample rate, or up to 5 GHz), making them ideal for working with extremely fast signals in laser systems, semiconductor testing, spectroscopy, reflectometry and a wide variety of RF applications.