With the great variety of HF applications found in the industry, there is a growing need for equipment that can be used on Single Sideband, AME, full break in CW, radio teletype, and Facsimile. Since many users in the Maritime Mobile Service actually require several of these modes, it is desirable to combine as many modes as possible in a single unit. This provides several additional benefits in the form of capital investment savings, reduced maintenance costs, minimizing the space required to house equipment, reducing the number of antenna systems required, and simplified operator training. While these benefits certainly inhance the desirability of developing a universal HF Communications system, they also create several problems that increase the complexity of the system, thus, demanding more stringent performance standards. Among those parameters subject to tighter standards are the following: frequency stability, carrier suppression, unwanted sideband suppression, keying wave form, envelope compression response, transmitter noise spectrum, transmitter and receiver bandwidth, and tuning range of the antenna system. This paper shall examine the effect that these problems have on an HF Communications System and the practical engineering solutions that may be applied to them.

  • Supplemental Notes:
    • Presented at the April 25-27, 1973 Seattle RTCM Assembly Meeting. Volume 1--Papers A thru E, Maritime Satellite Telecommunications Activity; Volume 2--Papers F thru L, Maritime Antennas, Personnel, and ITU Conference Activity; Volume 3--Papers M thru R, Systems Approaches to Maritime Telecommunications; Volume 4--Papers S thru Y, Navigation and Position Fixing in Maritime Telecommunications. Sold only as a complete four volume set--$10.00 per set.
  • Corporate Authors:

    Radio Technical Commission for Marine Services

    /Federal Communications Commission
    Washington, DC  United States  20554
  • Authors:
    • Gutman, G A
  • Publication Date: 1973-4

Media Info

  • Pagination: 13 p.
  • Serial:
    • Volume: 3

Subject/Index Terms

Filing Info

  • Accession Number: 00050266
  • Record Type: Publication
  • Source Agency: Radio Technical Commission for Marine Services
  • Report/Paper Numbers: Paper 103-73/DO-72
  • Files: TRIS
  • Created Date: Nov 14 1973 12:00AM