In this situation, customers can see that the common mode interference current is traveling in the same direction into both paths of the circuit. There has to be a return path and this is usually through a ground plane or wire. This figure shows a parasitic capacitance that creates a path for the common mode current to flow to ground. Current will not flow through the load as there is no potential difference across it. The magnitudes of the signals are equal. These signals will add together instead of canceling each other out. The result will be a high impedance to the common mode signal which will become heavily attenuated. This potential will vary with respect to ground. As this varies from ground, radiation or noise will occur. Using independent grounds can also create a difference in potential resulting in common mode noise. This is very common as these can create ground loops. This also occurs in ungrounded sources, such as remote ones. Making sure that a customer’s cable for the analog signal is grounded well and having a properly grounded system can alleviate a lot of headaches. However, these can act as antennas if designed wrong.