APPLICATION OF THE FOSTER CHANNEL BLOCK MONITOR (FCBM) TO AIR/GROUND COMMUNICATIONS

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)

• Corporate Authors:

  Ohio University, Athens

  3 Canterbury Drive
  Athens, OH  United States  45701

  Federal Aviation Administration

  William J. Hughes Technical Center, Airport Technology Research and Development Branch
  Atlantic City International Airport
  Atlantic City, NJ  United States  08405
• Authors:
  • Herold, D G
• Publication Date: 1979-12

Media Info

• Pagination: 49 p.

Subject/Index Terms

• TRT Terms: Control panels; Monitoring; Radio frequency interference; Radio links; Very high frequency
• Uncontrolled Terms: Monitors
• Old TRIS Terms: Air to surface

Filing Info

• Accession Number: 00313951
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: EER-42-1, FAA-R-6600.1
• Contract Numbers: DOT-FA79WA-4318
• Files: NTIS, USDOT
• Created Date: Jul 22 2002 12:00AM