A table of retune messages is indexed by this target virtual network ID. This table does not have entries for each instance (duplicate) of a retune message that the IRD receives because the uplink repeatedly broadcasts instances of each retune message for the duration of the virtual network program. Instead, this table presents select metrics describing the retune message, as described below. Each table entry pertains to the most recent active retune message. A retune message is considered active when the activation time is in the past. The IRD replaces the current retuneMsgEntry when a new retune message is received having an activation time that is in the past but nearer to the present time than is the activation time of the current retuneMsgEntry. The IRD ignores retune messages in which the activation time is in the future. The virtual network ID indicates which retune message is targeted. This leaf serves as the index for the table. Make sure this index is set prior to accessing the following retune message parameters. Range = 1 - 256.