Radio communication line for broadcasting operation system is a radio utilization system which is classified to broadcasting business use among radio communication line for public service aiming to business use in mobile communication on the ground. It was required that this Radio communication line for broadcasting operation shall shift from existing FM system to digital narrow system for effective usage of frequency.

This standard specifies wireless section interface of digital mobile communication system for business use by Single Channel per Carrier using 4FSK modulation among narrow band digital communication system using frequency less than 170MHz more than 142MHz which is provided in Ordinance Regulating Radio Equipment Article 57, 3, 2 for radio communication equipment for broadcasting business use.