1-6 General Information1.9 Rear PanelFig. 1-2 7010 Option 00 Rear PanelLegend from left to right:- Product Label and Serial Number- Mains socket to connect the EUT to the mains through the internal LISN.- Earth ground connector- USER PORT User I/O Port- Fan Cooling Fan controlled by firmware- RS232 9 pin, DB9 connector- On-Off switch Power switch- USB Fully functional USB 2.0 Port- Power Supply Power Supply Input to power the apparatus.