This read-write object sets, in milliseconds within a 32-to-1024 range, how often the Head End transmits its ALC grant information in the Map message to subscriber units. Tuning this interval affects how quickly subscriber units receive updated transmit-power grants versus the signaling overhead of sending them more frequently. For example, an admin troubleshooting subscriber units that react slowly to changing RF conditions might shorten p2mpHeAlcInterval so power grants are refreshed more often.