"Chase Scientific was originally founded as a consulting firm in 1987, specializing in advanced high speed analog and digital communication channels for the magnetic storage industry."
Chase Scientific - data acquisition and signal generation
Ax14000 - 4.0 GS/sec, 12-Bit, Arbitrary Waveform Generator (USB interface) - The 4.0 GSPS, DAx14000 is a highly versatile PC controlled Arbitrary Waveform Generator.
It incorporates many advanced features such as programmable segment sizes, looping, and individual segment triggering. Since the data downloaded to the card can be arbitrary almost any waveform that the user can imagine can be created.