NASA NTRS · 19900000378
Automatic Range Changer For SWR Meter
Abstract
Commercial unit modified for antenna-pattern measurements. Addition of automatic range-changing circuit converts Hewlett-Packard 415E standing-wave-ratio (SWR) meter into radio-frequency detector suitable for computer-controlled measurements of radiation patterns of antennas. Modification gives SWR meter effective dynamic range of at least 40 dB. Includes two digital lines communicating one of four range settings to controlling computer and one digital line to inhibit transfer of data when range being changed. Ideal instrument for use in applications involving computer-controlled monitoring of power when large changes in signal level expected.
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Dengler, Robert J., Siegel, Peter H.. 1990-08-01. Automatic Range Changer For SWR Meter. https://ntrs.nasa.gov/citations/19900000378
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