Investigation of Wilcox Model 585B Very High Frequency Omnidirectional Radio Range System Part 2.

Abstract

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 This procedure is recommended for solid-state VOR designed systems in which the rotatable goniometer has been replaced by a solid-state unit.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.

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1981
Accession Number
ADA099525

Entities

People

  • James Dong
  • Wayne Bell

Organizations

  • Federal Aviation Administration

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Amplitude Modulation
  • Analyzers
  • Calibration
  • Detectors
  • Frequency
  • Goniometers
  • Measurement
  • Modulation
  • Modulators
  • Monitors
  • Omnidirectional
  • Power Supplies
  • Spectra
  • Spectrum Analyzers
  • Test Facilities
  • United States
  • Very High Frequency

Fields of Study

  • Physics

Readers

  • Aerospace Test and Evaluation
  • Electronics Engineering

Technology Areas

  • Space