Selects the ASTRO OTAC (Over The Air Channel) associated with positions 1 through 16 of the radio's channel selector. The Zone field must first be selected for the current record / row. Zones and channels must first be set up in the Zone Channel Assignment Window. This selection applies for the current record / row and for ASTRO type Conventional Systems.

When the radio is model / option capable, and

when the Zone field is not set to a Dynamic Zone.