Process

Noise-Dissipation System

The examples shown on the left, show the effect of various sources of RFI/EMI energy on conventional shielded interconnect when passing a sine wave. Figure “A” shows the modulation of the ground caused by this incoming RFI/EMI energy as it is picked up by the cable shielding. This, in turn, modulates the ground plane of the gear the cable is connected to. One easy analogy is to think of the electrical ground as the earth we walk on. The routing of RF energy to ground causes various degrees of seismic activity in the “earth”, otherwise known as earthquakes. These earthquakes in turn wreak havoc on whatever is sitting (or moving) on the earth/ground. Electrically, we have signal “riding” on the ground. When the ground gets modulated, the signal also gets modulated as shown in Figure “B”.

In Figure “C” a DVD player to A/V Receiver cable connection is shown using a conventional shielded interconnect. The effect of incoming RFI/EMI coming into the amplifi er via the interconnecting cable can be seen at the output of the amplifi er in the form of a distortion of the sine wave signal.