A MULTICHANNEL PERSONAL TELEMETRY SYSTEM USING PULSE POSITION MODULATION
Abstract
A personal t le e ry system using the pulse position modulation technique was developed. The laboratory model transmi s heart rate, respiration rate, and body te per ure wit i a range of 100 feet. Compared with FM - FM Systems this system has the adv n age of very low power consumption (20 milliwatts), light weight (6 ounces with batteries for 80 hours continuous operation), small size (4-3/4 by 3-1/2 by 1 inc es), and sufficient accuracy and stability (2 percent baseline stability) for physiological measurements. An inexpensive, small, singletrack tape recorder may be used for recording; and an extremely simple and inexpensive playback system can be used for scope display. Although more complex equipment is required for the playb ck y tem to standard penwriters, this penwriter decoding unit is not any more complicated than standard FM discriminators. Simple, reliable, switching-type circuits which work over a wide temperature range are used, and there is no proble with cross alk be een channels. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1961
- Accession Number
- AD0266338
Entities
People
- Adolf R. Marko
- Edward G. Correll
- Miles A. Mclennan
Organizations
- Air Force Research Laboratory