Kompatibilitetsundersøgelserne bygger bl.a. på den antagelse, at ultrabredbåndsudstyr overvejende vil blive brugt indendørs og ophøre med at sende i løbet af 10 sekunder, hvis det ikke får bekræftet fra den korresponderende modtager, at dets signal er modtaget.
These compatibility studies include, inter alia, the presumption that equipment using ultra-wideband technology will be operated predominantly indoors and that it will cease transmission within 10 seconds unless it receives an acknowledgement from an associated receiver that its transmission is being received.