Multi-Address Digital Command System

Abstract

The Model 2A Multi-address Digital Command System can provide 95 commands for transmission to each of 10 addresses in a balloon-borne scientific payload. To prevent false-command activation, the balloon-borne decoder checks the station address, performs a double-scan parity check, and generates a reply code that is telemetered back to ground control for verification before the Execute command is issued. The system is operable with high frequency, very high frequency and ultrahigh frequency communications systems, both AM (amplitude modulation) and FM (frequency modulation). Since 1986 it has been flown routinely on Geophysics Laboratory scientific balloon payloads with error-free operation. (jg)

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Document Details

Document Type
Technical Report
Publication Date
Nov 07, 1989
Accession Number
ADA223298

Entities

People

  • H. Laping

Organizations

  • Air Force Research Laboratory

Tags

Communities of Interest

  • Energy and Power Technologies
  • Space
  • Weapons Technologies

DTIC Thesaurus Topics

  • Amplifiers
  • Amplitude Modulation
  • Automatic Gain Control
  • Circuit Boards
  • Classification
  • Converters
  • Diagrams
  • Fabrication
  • Frequency
  • Frequency Bands
  • Frequency Shift
  • Geophysics
  • Modulation
  • Power Supplies
  • Printed Circuits
  • Security
  • Standards

Readers

  • Aerospace Test and Evaluation
  • Computer Networking
  • Optical Physics and Photonics.