Implementation of a stationary Hadamard transform spectrometer with a DSP56001 digital signal processor

Stationary Hadamard transform (HT) spectrometry provides a means of measuring the intensity of light from multiple wavelengths using a single detector and a stationary electrooptic mask. A block diagram of a simple stationary HT spectrometer is presented and some of the associated problems are discussed. An implementation based on the Motorola DSP56001 digital signal processor is described and then compares to an earlier realization. The completion times of representative tasks (those completed each encodement cycle) are compared. The results show that the mask settling time is the dominant factor in the speed of the DSP-based system