12 AM Considerations
With the end of the previous chapter, we have completed our detailed tour of the NRSC-5 protocol stack. As shown, the theory of operation of In-Band On-Channel transmission is a complex yet elegant solution to the challenging problem of working within the existing AM and FM bands. The next section of this book is devoted to more practical issues. To put an IBOC signal on the air there are several considerations to which the broadcast engineer must attend. First, AM and FM transmission facilities each have specific design constraints that affect the quality of the IBOC digital signal. This chapter discusses the AM broadcast facility considerations. Chapter 13 follows with a discussion of FM considerations. Second, the station's ...
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