An Optically Linked Telemetry System for Use with Electromagnetic-Field Measurement Probes
- 1 November 1978
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Electromagnetic Compatibility
- Vol. EMC-20 (4) , 483-488
- https://doi.org/10.1109/temc.1978.303627
Abstract
A battery-powered optical telemetry transmitter, 2.5 X 2.5 X 3 cm, has been developed for use with various electromagneticfield hazard probes. The electrical outputs from one of these probes, containing three orthogonal sensors, are electrooptically converted to three separate optical pulse trains so that a dc to 2-kHz information bandwidth is established in the transmitter using frequency-modulation techniques. The three optical pulse tains are transmitted over a 4.6-m fiber-optics bundle to one of two types of receivers. These units reconvert the information to either an analog replica of the transmitter input waveform, or to a three-digit, scaled numerical display of the time-averaged value of the input signal. Practical applications involving field-strength measurements in the 1-MHz to 12-GHz region are presented. Advantages over hardwire data links are discussed, and significate reductions in RF interference and cable backscatter during field-strength measurements are described.Keywords
This publication has 3 references indexed in Scilit:
- Precise Calibration of Plane-Wave Microwave Power Density Using Power Equation TechniquesIEEE Transactions on Microwave Theory and Techniques, 1977
- Development of electric and magnetic near-field probesPublished by National Institute of Standards and Technology (NIST) ,1975
- An Optically Coupled ECG SystemIEEE Transactions on Instrumentation and Measurement, 1973