Noise suppression methods are introduced in each example listed on the right. To view product details, click on any product below to go to the "EMIFIL®" catalog page for that product.	Noise Emission Status Noise Suppression Model     Improving the Shielding Improving the GND Installing EMI filters on the Clock Line Installing EMI filters on Bus Lines Installing EMI filters on Interface Cable Ports

The car navigator is shielded with a metal case to prevent noise being radiated from the body, as well as noise entering the body. EMI filters are installed on all lines of each interface cable to suppress noise conduction through the cable. The noise suppression effects obtained by a capacitor type EMI filter installed in the cable connector port varies widely depending on the GND connection. Therefore, attention must be paid to the GND connection. Improve the GND connection between the PCB and metal case, and design the circuitry to minimize the impedance at high frequencies between the metal case and the GND of the capacitor type EMI filter. Noise radiated from the car navigator can be most effectively suppressed by also installing EMI filters on the clock line, bus lines, and power supply line.