Page 59 of 1315.7.1.4 RS-232 NMEA DeviceWith Serial Port ConnectorWhen using a NMEA device with Serial Port connection, a USB to Serial Adapter (PL-2303HX)is required. In addiiton, a USB hub (either 1.0 or 2.0) plugged into the Optimizer's USB isrequired in order to accomodate multiple USB devices. CAUTION: The PL-2303HX is the onlyUSB to Serial Adapter that is compatible with the Optimizer.Plug the small USB drive that came with the Optimizer into one of the USB Hub ports, connectthe NMEA device to the USB Hub with the USB to Serial Adapter (PL-2303HX).(OPTIONAL: Use an ethernet cable to connect the computer with the destination software, likea navigation program, to one of the Optimizer's Ethernet ports.)The Optimizer will broadcast the GPS signal both over Ethernet and WiFi, so you can connectyour computer either way in order to establish a successful connection with your destinationsoftware.