AM IBOC

Our AM Legacy

Backward Compatibility

What is Bandwidth, and What Does It Mean to Us?

Propelled from the Jet Age to the Space Age

        Invisible IBOC

        Antenna System Effects on the AM IBOC Signal

            Outermost, or Primary, Sidebands

            Outer or Secondary Sidebands

            Inner or Tertiary Sidebands

        Self-Canceling Sidebands

Transmitter Loading and System Bandwidth

        Hermitian Symmetry

        Measurement

        Analog's Regulatory Vicious Cycle

        Intermodulation Products

        Pattern Bandwidth

High-Performance, Precision Antenna Systems

Nighttime AM Testing and Analysis

Conclusion

Chapter 12: TABLES
12.1 Example of Perfect Hermitian Symmetry within a +5 kHz AM Passband
12.2 Recommended AM Bandwidth Performance Goals

(Back to top)

Chapter 12: FIGURES
12.1 Necessary Bandwidth of FM Signal
12.2 Necessary Bandwidth of AM Signal
12.3 Overlapping Necessary Bandwidths of 1st-Adjacent AM Signals
12.4 Abutting Necessary Bandwidths of 2nd-Adjacent AM Signals
12.5 AM IBOC 1st and 2nd-Adjacent Sidebands in US Frequency Assignments
12.6 Breakpoint for Impedance Measurement of AM Transmission System
12.7 Hermitian Symmetry and Hermitian Symmetrical Plot Rotated to Compensate for Transmitter Matching Network (Based on Material by duTreil, Lundin & Rackley, Inc.8)
12.8 Example of Hermitian Symmetry on Smith Chart with VSWR Circles Normalized to Impedance at Center Frequency
12.9 Comparison of FCC/NRSC-2 Mask and Hybrid AM IBOC Mask
12.10 AM IBOC 1st, 2nd and 3rd-Adjacent Sidebands in US Frequency Assignments
12.11 An AM Pattern at Center Frequency and + 15kHz

(Back to top)