The MSXB 050 Quadrature Decoder Board allows a Data Acquisition Processor to read quadrature-encoded signals through its digital port. Quadrature-encoded signals are often used to measure the angular velocity and angular position of wheels, gears, and motors.

The Quadrature Decoder Board has four input channels. Each channel can measure quadrature-encoded signals with frequencies up to 1 MHz. The board has a counter resolution of 16 bits, and can be extended to 32 bits with software. Up to six Quadrature Decoder Boards can be used in a system for a total of 24 channels