DDS-3X25 USB Waveform parameter 1. Choose waveform Press down any button of certain waveform to switch to the output of such kind of waveform. When switching to arbitrary waveform from other kinds of waveform, the edition work can be done on the original wave form. 2. Set waveform parameters Click Menu “Wave Parameter”, there are the options for setting various waveform parameters. For example: click “AM/FM” to set the AM/FM parameters in the dialog. DDS-3X25 USB User’s Guide 20