June 1975 | NTIA Technical Memo OT TM 75 201
Digital transmission test results over a long ll-GHz line-of-sight link
Darren L. Smith; F. George Kimmett; Charles A. Samson; Albrecht P. Barsis
Abstract: Digital data transmission tests using a 12.6 Mb/s data stream (3-level partial response) were performed over a l16-kmlineof-sight link in northeastern Colorado using a carrier frequency in the 11.2 -11.45 GHz band. During the first four days of a five-day measurement period, the BER (bit-errorrate) was very low. High rates were observed only on the fifth day; they appear to be caused by multipath fading and related low signal levels. This report presents a discussion of the test implementation, of the test results, and of pertinent weather information for the test period.