Using DSPs to build modular data-acquisition and instrument control systems: Shifting functionality from hardware to software

Details Using DSPs to build modular data-acquisition and instrument control systems: Shifting functionality from hardware to software Using DSPs to build modular data-acquisition and instrument control systems: Shifting functionality from hardware to software

Feb 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994pasp..106..173a&link_type=abstract

Astronomical Society of the Pacific, Publications, (ISSN 0004-6280), vol. 106, no. 696, February 1994, p. 173-181

Other

4

Computer Programs, Control Systems Design, Control Units (Computers), Data Acquisition, Digital Computers, Numerical Control, Signal Processing, Telescopes, C (Programming Language), Hardware, Object- Oriented Programming, Space Infrared Telescope Facility

Scientific paper

A low-cost data-acquisition and instrument control system based on digital signal processors (DSPs) has been constructed for use with an instrument using an infrared array. By using off-the-shelf components, system design was simplified, construction time and cost were reduced, and reliability was increased. Readout time for an 11 x 64 array is 3.5 ms. Faster readout times are easily attainable by using DSPs with higher clock speeds. The use of DSPs shifts much of the functionality (and the development work) from hardware to software. The acquisition software is a distributed system running on two Sun SPARC stations and two DSP cards containing Motorola DSP56001s. The data-acquisition software takes advantage of the object-oriented features of C++ to modularize the software system. This simplifies the DSP and telescope interfaces and the implementation of a variety of observing modes. The modularity of this system allows it to be easily adapted to other telescopes and/or arrays.

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