Frame grabbers support multiple cameras

Alta-AN analog frame grabbers can acquire images from most analog cameras--high-speed asynchronous-reset monochrome cameras to high-resolution color HDTV cameras. There are three models: Alta-AN1, which has one virtual frame grabber (VFG) and can support one analog camera; Alta-AN2, which has two VFGs and supports two cameras; and Alta-AN4, which has four VFGs and supports four cameras. Each VFG is a completely independent frame grabber. Each Alta model is a half-size x4 PCI Express board, supporting a total data rate up to 1 Gbyte/s. A SDK is available for both 32- and 64-bit Windows platforms.
BitFlow
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