Two Quadrature Modulation/Phase Shift Keyed (QM/PSK) Voice/Data Modem systems have been developed as part of the satellite communications hardware for advanced air traffic control systems. These systems consist of a modulator and demodulator unit which provides for the one-way communication of voice and/or data signals. The modulator and demodulator unit provides simultaneous transmission of analog voice and digital data signals multiplexed on a single carrier, using quadrature modulation techniques. The modem interfaces with the transmitter/receiver at 70 MHz intermediate frequency. The report contains design theory, circuit descriptions, diagrams, calibration procedures, and laboratory test results. (Author)

  • Corporate Authors:

    Bell Aerospace Company

    Buffalo, NY  United States 
  • Authors:
    • Lerner, T
    • McChesney, J
  • Publication Date: 1976-3

Media Info

  • Pagination: 97 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00133379
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: FAA-RD-76-63
  • Contract Numbers: DOT-TSC-631
  • Files: NTIS
  • Created Date: Jul 13 2002 12:00AM