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Hybrid AM HD Radio Interference Scenarios

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From National Radio Systems Committee, DAB Subcommittee, “Evaluation of the iBiquity Digital Corporation IBOC System, Part 2 - AM IBOC,” April 6, 2002, p. 16-17.

AM IBOC interference scenarios between stations located on first (upper), second (middle), and third (lower) adjacent channels from each other.

Note that although an analog AM signal (center solid block) occupies 10 kHz of bandwidth, a hybrid AM IBOC signal (solid block plus hatch-marked area) occupies three times the spectrum.

HD Radio interference on the AM band has been described as sounding like "hash," a "frying bacon effect," and an "audible buzz."

Back to "Public Broadcasters Seek Digital Interference Study"