R&S®Power Viewer Plus Software Manual - Rohde & Schwarz

R&S Power Viewer PlusConfiguring the Application9.4 USB-Related SettingsThe USB tab is shown below and is used for altering USB interfacerelated settings on Microsoft Windows-based operating systems.Fig. 9.4.1: USB settings.Long Distance ModeThis mode is only available for Windows-based operating systems. Itreduces the number of simultaneous read processes, which lowersUSB resource allocation in the operation systems dramatically.AnywhereUSB ® connections, for example, require activation of the LongDistance Connection mode.Selective Suspend ModeWindows can turn off unused USB hubs or unused ports on USB hubs.This is the default setting on most fresh installations. In some situationsthis mechanism does not work properly and can leave a hub turned offor in an undefined state. Disabling selective suspend turns this powersaving mechanism off for all hubs and subsequently requires a systemreboot. The selective suspend should only be turned off if USB devicesdo not get activated after they were plugged into a USB port.Manual 42