This paper discusses the characteristics and relative merits of some of the alternate signal modulation methods which are employed to transmit various forms of data and voice over AML microwave systems.
AML systems have during the past 10 years become widely accepted as the dominant means for the local distribution of multiple video signals in the CATV industry. The reasons for this extensive use of more than 20,000 video channel paths worldwide are tabulated in Figures 1 and 2. In a nutshell, these reasons are that AML systems are more cost effective, spectrum efficient, and reliable than any of the available alternatives.