Tektronix mdo3usb usb serial triggering and analysis module tektronix mdo3usb p the tektronix mdo3usb is a usb serial triggering and analysis module the module enables triggering on analytical tools such as digital views of the signal bus views packet decoding search tools and packet decode tables with time stamp information for low speed full speed and high speed usb serial buses p tektronix mdo3usb application module for mdo3000 series