TEST OF COMPATIBILITY OF THE LOCATE(R) III DISTRESS ALERTING AND LOCATING SYSTEM (DALS) IN CO-CHANNEL OPERATION WITH AN FM VOICE COMMUNICATION SYSTEM

A test of Co-channel FM compatibility of the LOCATE(R) III DALS and a voice communication system was conducted to determine what effects each system has on the other when operated simultaneously on a common FM channel. The test was conducted in two phases. Phase I of the test determines the effect on voice communications intelligibility as a function of DALS interference. Phase II determines the effect on DALS operation as a function of voice communications. The test shows that the two systems can be operated in a co-channel configuration; however, some degradation of each system's performance can be expected.

• Corporate Authors:

  United States Coast Guard

  Research and Development Center, 1082 Shennecossett Road
  Groton, CT  United States  06340-6096
• Authors:
  • DeGeorge, W A
  • Crowell, R D
• Publication Date: 1974-7

Media Info

• Pagination: 58 p.

Subject/Index Terms

• TRT Terms: Communication systems; Distress signals; Frequency modulation; Interference; Legibility; Radio; Radio signals; Speech; Speech recognition; Very high frequency; Voice communication
• Uncontrolled Terms: Compatibility; Intelligibility; Narrowband
• Subject Areas: Safety and Human Factors;

Filing Info

• Accession Number: 00090002
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: CGR/DC-20-74 Intrm Rpt.
• Files: NTIS
• Created Date: Apr 22 1975 12:00AM