Investigation of Wilcox Model 585B Very High Frequency Omnidirectional Radio Range System Part 2.
Interim rept. May-June 80,
FEDERAL AVIATION ADMINISTRATION TECHNICAL CENTER ATLANTIC CITY NJ
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This report establishes a calibration procedure which employs a space modulation chart to adjust percent modulation for the Wilcox 585B very high frequency omnidirectional radio range VOR System. This procedure is recommended for solid-state VOR designed systems in which the rotatable goniometer has been replaced by a solid-state unit. Ground and airborne modulation tests were made using a spectrum analyzer for determining percent modulation. Results of these measurements indicated 1.5 percent modulation be added to the normal 30 percent modulation adjustment when made with the detector at counterpoise edge to provide equality between near and far afield modulation measurements.
- Electrical and Electronic Equipment
- Air Navigation and Guidance
- Radio Communications