Abstract
Digital recording technologies are increasingly replacing analogue methods for recording most forms of signals, particularly in professional environments. Digital audio tape and CD-ROM have replaced earlier analogue magnetic tape recording, except for the low-cost compact cassette. The same trend is apparent in the video field, with the appearance of digital video recorders at the consumer level. Given the crucial importance of accurate and reliable recording of experimental data to the researcher, an understanding of the basic principles of digital recording techniques is an essential skill. Digital techniques have many advantages, but they are not a panacea for all problems. Like any methodology, they have strengths and weaknesses that the user needs to be aware of. This chapter discusses the basic principles of the digital recording of experimental signals and associated issues, such as the generation of test waveforms and the control of experiments.
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