Winegard SWM-D30 Multiswitch DSW30 Satellite Signal Distribution admin November 23, 2023 November 23rd, 2023 winegard distribution dsw30 multiswitch satellite signal swm-d30 winegard It is designed specifically for use with DIRECTV® systems and requires a PI-28 or PI-29 Power Inverter and SWM-Splitter. Enables SWM (Single Wire Multi Switch) operation compatibility. Operation Compatibility: SWM (Single Wire Multi Switch).