Ibiquity Refines FM IBOC Emission Mask

Ibiquity Digital has slightly changed its emission mask specifications for FM IBOC.
In a Notice of Ex Parte Filing with the FCC, Ibiquity states the “minor adjustments” are “based on additional analysis and real world experience.”
An anonymous reader of CGC Communicator states in a letter “Note the 250-600 kHz changes from near -80db to -74.4db, plus average weighting changes.”