What is a mac pac in a uniden radio scanner?

A MAC PAC (Multi-Access Control Packet) in a Uniden radio scanner refers to a type of digital communication protocol used to decode and process signals from trunked radio systems. It enables the scanner to efficiently handle multiple conversations on the same frequency by managing access to the channel. This feature enhances the scanner's ability to track and decode various radio transmissions, particularly in complex environments where multiple users share the same frequencies.