DEB Stage 1 CONUS Link Testing Interim Report.
Abstract
CONUS link testing was initiated to establish a data base and performance assessment of a similar microwave system in advance of the final implementation of the DEB Stage-1 program. Six AN/FRC 162 radios, two AN/FRC 165 radios, and ten T1-4000 multiplexers were used to establish four terminals with the capability of propagating over eight paths, one of which had a length of 82 miles. Mathematically predicted fade margins were not realized. A large difference was noted in the number of fades recorded at each terminal receiver, over one path. A noteworthy number of fade rates in excess of 70 dB/second was observed, and over 0.5% of recorded fade depths were 30 dB or greater. Except for four dropouts, the long term BER for the 82-mile link was 1.4 x 10 to the minus 12th power. The BER was 1.85 x 10 to the minus 8th power after eight transmission links of baseband repeaters, but with a 10 dB fade margin. Variability among multiplexer sensitivities was important in determining the distribution of errors in the baseband repeater tests. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 29, 1976
- Accession Number
- ADA032721
Entities
People
- Edward New
- John J. Mcdonnell
- Stephen T. Schoch