Field testing DigiCipher HDTV in Los Angeles

Test results for DigiCipher, the first all-digital HDTV system developed by the American Television Alliance, showed that the DigiCipher system performed very well in all areas, including the laboratory testing of terrestrial transmissions. Recently, field testing of the DigiCipher HDTV system in the Los Angeles, California, area was undertaken to verify the performance of the system in a real world environment, and to help anticipate how DigiCipher will perform in US FCC field testing. The results indicated that reliable reception can be achieved at distances as far as 42 miles from the transmitter, with only 137 W of average power in the presence of strong adjacent channel and cochannel interference.<
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