SENNHEISER SDC 3000 D - KONFERENZSYSTEM / SYSTEM BDA Owner's Manual . With this manual You'll learn how to set up and use Your SENNHEISER SDC 3000 D - KONFERENZSYSTEM / SYSTEM BDA. The manual describes functions of SDC 3000 D - KONFERENZSYSTEM / SYSTEM BDA, tells how to use it correctly and includes instructions on maintanance.