It's my understanding AM IBOC needs an antenna bandwidth of +/- 20 KHz. Some stations have the luxury of an antenna system able to pass the full bandwidth. But many owners have to figure out how to meet the challenge of digital, if they choose. So considering many AM facilities use a skirt antenna, short towers or a directional array that hasn't been maintained in years makes IBOC a moot point unless you create room in the budget for a massive capital expense.
Discuss.
Discuss.