DEVELOPMENT OF THE PILOT WARNING INSTRUMENT (PWI)

Abstract

The theory and operation of a metric wave pilot warning instrument are presented in detail. Each aircraft transmits its altitude as frequency modulation at 135.54 megacycles. This interrogating pulse of 500 microseconds is transmitted omnidirectionally and reply is made by all coaltitude aircraft with a 15 microseconds pulse at 135.54 megacycles. The direction of the reply is determined by receiving the signal on three spaced antennas and comparing the phase. The distance and angle of arrival are presented on a multiple sector display. The several individual circuits and functions are discussed adequately for maintenance of the equipment during evaluation and test. Complete schematics and critical waveforms are included. Recommendations for improvement are presented.

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Document Details

Document Type
Technical Report
Publication Date
Feb 01, 1962
Accession Number
AD0273831

Entities

People

  • A. Farkas
  • G. D. Morehouse

Organizations

  • Motorola Mobility

Tags

Communities of Interest

  • Advanced Electronics
  • Air Platforms

DTIC Thesaurus Topics

  • Angle Of Arrival
  • Frequency Modulation
  • Local Oscillators
  • Measurement
  • Modulation
  • Modulators
  • Oscillators
  • Phase Modulators
  • Power Supplies
  • Radio Frequency
  • Radio Frequency Amplifiers
  • Resonant Circuits
  • Semiconductor Devices
  • Semiconductors
  • Transducers
  • Transistor Amplifiers
  • Tuned Circuits

Fields of Study

  • Physics

Readers

  • Aviation Safety and Air Traffic Management
  • Radar Systems Engineering.
  • Software Engineering

Technology Areas

  • Space