Probes
 

Four probes are available in this CRO Demonstration but only the co-ax and BNC plugs are visible. They are color-coded purple, blue, green and orange are located at the lower edge of the screen at start-up. They can be dragged to an input on the CRO using the mouse and engage automatically once the mouse button is lifted. A cable can be detached from an input by drag & drop. Every cable delivers a different signal. The actual waveforms and phase difference are for you to find out. This is the point of this demonstration. Signals which appear to be same frequency and amplitude are different in phase. The phase difference will only become visible when performing a measurement in "X-Y" mode. A cable can be attached to the external trigger  connector but in this version, a signal on the external trigger is not processed. Note: X-Y does not mean X minus Y. It means "measurement on two lines (at 90° to each other), called the X axis and Y axis."