The ScanaQuad SQ50 is an FTDI FT240X + Spartan-3AN-based logic analyzer made by IKALOGIC. It seems to be slightly related to the older ScanaPLUS. We're working on documenting the USB protocol, for Sigrok support, and maybe some other stuff.
IKALOGIC provides a proprietary software tool for interfacing with their logic analyzers, called ScanaStudio.
The device has three functionality modes, "capture", for capturing data, "generate" for generating test patterns, and "mixed" for a mixture of the former two. It has 4 channels and can operate at a nominal maximum sample rate of 50 MHz. Signal voltage can be configured between 1.8V and 5.0V. It has quite complicated and expressive trigger settings.