DDS-3X25 USB Output without PC DDS-3X25 can save a waveform to its own memory and work without PC. Open: Select menu “Utility”->”Open output power on”. Then the current waveform will be saved to hardware. And the waveform will be generated every time when you connect the DDS-3X25 to power. If the DDS-3X25 USB is without PC, it should be powered by an external power of DC 5V through the “DC 5V” input socket, like below picture. Close: If you want to clear the waveform from the hardware memory, select “Close Output Power On”. DDS-3X25 USB User’s Guide 28