A Digital Telemetry System for Physiological Variables

A radio telemetry system is described which satisfies the data acquisition requirements for research in the field of military environmental medicine. The adoption of digital encoding, transmitting, and recording techniques, and the development of a methodology which features serial interrogation by a portable data recording station, have resulted in the construction of a 100-subchannel facility capable of precise measurement and recording of a variety of physiological measurands during field maneuvers. The basic equipment configuration includes a data recording station which generates the time base for interrogation and produces a punched paper tape suitable for direct computer entry and five associated data acquisition stations carried by test subjects performing military tasks in environmental extremes. All units are selfcontained, battery-powered, solid-state packages compatible with standard army load carrying systems.