LABORATORY TESTS OF A DATA LINK MODEM

The report evaluates the performance of two minimum shift key (MSK) modulation modems designed for a very high frequency (vhf) data link communications. Tests consisted of determining the probable bit error of two modems in a loop-around mode for each modem and then in a back-to-back mode between the two modems. For each of these two test conditions, the modems were subjected to various signal-to-noise (S/N) ratios at the data rates of 2400 and 4800 bits/second (b/s). Each test was terminated after 800 bit errors were accumulated, except for those test runs where the modem was running essentially error free, the test period was limited to a 24-hour period. Results indicated that the performance of each modem was the same over the S/N ratios used, within a plus or minus 1-dB S/N tolerance.

• Corporate Authors:

  NATIONAL AVIATION FACILITIES EXPERIMENTAL CENTER

  ATLANTIC CITY, NJ  United States 

  Federal Aviation Administration

  Systems R&D Service, 800 Independence Avenue, SW
  Washington, DC  United States 
• Authors:
  • Bilello, J A
• Publication Date: 1975-9

Media Info

• Pagination: 24 p.

Subject/Index Terms

• TRT Terms: Data communications; Digital computers; Laboratory tests; Modems; Very high frequency
• Uncontrolled Terms: Data links
• Old TRIS Terms: Digital systems

Filing Info

• Accession Number: 00093406
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: FAA-NA-75-6 Final Rpt., FAA-RD-75-134
• Files: NTIS, USDOT
• Created Date: Dec 29 1976 12:00AM