Application of the Foster Channel Block Monitor (FCBM) to Air/Ground Communications.

Abstract

The Foster Channel Block Monitor (FCBM) is a device which monitors the interference level of a communications channel while the operator is transmitting. The result of this capability is to reduce co-channel transmissions which block each other. This paper describes an implementation of the FCBM concept in retro-fitting standard FAA ground-to-air communications equipment. No function of the communications equipment is lost due to the addition of the FCBM capability. The sensitivity of the receiver remains unchanged. This paper also describes the in-band and out-of-band interference of the unit and shows that these are below that required by the FCC Rules and Regulations. The unit performed accurately in bench tests. The operator is alerted to the presence of an interfering signal and given an indication of the level of the signal by lights on the control panel. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1979
Accession Number
ADA082880

Entities

People

  • David G. Herold

Organizations

  • Ohio University

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Aircrafts
  • Circuit Boards
  • Communication Equipment
  • Computer Programs
  • Detectors
  • Diagrams
  • Electrical Engineering
  • Engineering
  • Frequency
  • Frequency Domain
  • Generators
  • Modulation
  • Radio Communications
  • Shift Registers
  • Square Waves
  • Transmitters
  • Waveforms

Fields of Study

  • Engineering

Readers

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