The USB-1616HS-BNC, a 1 Msamples/s, 16-bit USB data-acquisition device, provides 16 BNC differential analog inputs and handles synchronous and concurrent voltage inputs, waveform outputs, counter inputs, quadrature encoder inputs, and digital I/O. Reportedly unique, the unit includes a low-latency, highly deterministic control output mode that operates independently of the PC. In this mode, digital, analog, and timer outputs respond to analog, digital, and counter inputs in as little as 2 µs. Trigger options range from an analog trigger with a 1-µs maximum latency to multi-channel triggering where any combination of analog, digital, and counter-input channels can combine to initiate the trigger. Other trigger modes include digital pattern, level, edge, inside/outside window, and pre- and post-trigger. Other features include seven programmable input ranges from ±100 mV to ±10 V full scale, an over-sampling mode including line-cycle rejection for low-level voltage measurements, four counter inputs capable of measuring frequency, period, pulse width, or quadrature encoders at rates up to 20 Msamples/s, and two timer outputs. Support software includes TracerDAQ, a data logging, viewing, and analysis application, Universal Library, UL for LabVIEW, and the InstaCal installation, calibration, and test utility. MEASUREMENT COMPUTING CORP., Middleboro, MA. (508) 946-5100.