The M3i.21xx Express series offers 4 different versions ranging from 250 MS/s up to 1 GS/s with one or two channels. The powerful analog section has been designed for highest bandwidth together with best signal quality and a versatile highly configurable amplifier section. An extremely low dead time between segments in Multiple Recording mode specifies this card for fast repeating signals like LDA/PDA, RADAR or Ultrasound applications.

In contrast to the parallel PCI buses PCI Express slots contain serial point to point connections. Each connection pair (lane) is able to reach a burst connection speed of 250 MBytes/s. The Spectrum PCI Express cards base on the most commonly used x1 lane slot type. One advantage of the PCI Express technology is the direct connection of each slot allowing a full transfer bandwidth for each single card. On the software side there is no difference between PCI/PCI-X or PCI Express. PCI Express is the bus standard for PC based systems for the next couple of years. Today's State-of-the-art motherboards normally have a couple of PCI Express slots but only one or two PCI-X slots. Spectrum's PCI Express x1 cards can be used in any standard PCI Express slot be it x1, x4, x8 or x16. Only some dedicated PCI Express graphics slots may not work.