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Title: Digital Versus Analog Telemetering
Author: R. H. Cadmus
Source: 1966 Appalachian Gas Measurement Short Course
Year Published: 1966
Abstract: Over the years, the Gas Industry has seen a tremendous expansion in the use of Telemetering and Data-Handling Equipment. This has been brought on primarily by the expansion of the natural gas system itself and the need for centralized dispatch of these expanded systems. Initially, some of our most complex systems started off with one or two measurements, which were telemetered back to a local dispatch point. Based on the success of these earlier systems, increased telemetering and remote control equipment were utilized and subsequently the need to centralize these local dispatch points became apparent. In the earlier days, due to the technical limitations, most of the equipment involved was of the electro-mechanical, analog type but as new techniques were developed in the use of electronic equipment the trend has been towards electronic designs of the digital type which utilize pulse techniques. However, this does not mean that the analog techniques have been abandoned in favor of digital techniques, but instead the change seems to have been one from electro-mechanical to electronic that is, there arc many electronic analog techniques which are currently available which have many features which would recommend them for use in the Gas Industry. Briefly, the advantages of both the analog and digital systems which may he ascribed to them are as follows.

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