In-Line Termination Resistors are typically used when:

In-Line Termination Resistors are typically used when:

• A. For short runs
• B. For distance less than 2 meters
• C. There are cable runs greater than 6 meters up a mast or tower.
• D. For any network

Answer: (C)

In this bus system, keeping the signal clean is all about proper termination to prevent reflections on the line. NMEA 2000 uses a CAN-like backbone that wants a specific impedance, typically matched with terminators at the ends of the backbone. When cable runs are unusually long or run up a mast or tower, the electrical length increases and the risk of reflections grows, which can distort data on the network. An inline termination resistor helps by providing a proper load along that long run, helping maintain the correct impedance and dampen reflections where the line is extended. For shorter runs, the standard end-terminals at the ends of the backbone are usually enough, and inline terminations aren’t typically needed. So when you have cable runs greater than about 6 meters up a mast or tower, inline termination becomes the sensible choice to preserve signal integrity.

In this bus system, keeping the signal clean is all about proper termination to prevent reflections on the line. NMEA 2000 uses a CAN-like backbone that wants a specific impedance, typically matched with terminators at the ends of the backbone. When cable runs are unusually long or run up a mast or tower, the electrical length increases and the risk of reflections grows, which can distort data on the network. An inline termination resistor helps by providing a proper load along that long run, helping maintain the correct impedance and dampen reflections where the line is extended. For shorter runs, the standard end-terminals at the ends of the backbone are usually enough, and inline terminations aren’t typically needed. So when you have cable runs greater than about 6 meters up a mast or tower, inline termination becomes the sensible choice to preserve signal integrity.