Broadcast Devices CDS-302 Automatic Composite Audio Switch/DAThe CDS 302 Automatic Composite Audio Switcher DA is still the best base band FM stereo management product available. The unit accepts 2 base band inputs and distributes the selected input to 3 base band outputs. The unit incorporates our exclusive RBDS loop through feature for RBDS lock and distribution using only one RBDS generator. The automatic feature allows for silence detected switchover in the event of an STL failure or processor lockup.