RG6 and RG11 coaxial cables have a nominal impedance of

RG6 and RG11 coaxial cables have a nominal impedance of

• A. 50 Ohms
• B. 60 Ohms
• C. 100 Ohms
• D. 75 Ohms

Answer: (D)

Coax cables have a characteristic impedance set by their size and dielectric, and a system works best when the source, line, and load all share that impedance. RG6 and RG11 are designed for video, cable TV, and satellite signals, so they use 75 ohms. Matching the line to 75 ohms minimizes reflections and preserves signal integrity across the frequencies used in these applications. The other values correspond to different uses: 50 ohms is typical for many RF transmitter/receiver systems, 100 ohms is common in some twisted-pair Ethernet and balanced audio, and 60 ohms is not a standard for modern consumer coax.

Coax cables have a characteristic impedance set by their size and dielectric, and a system works best when the source, line, and load all share that impedance. RG6 and RG11 are designed for video, cable TV, and satellite signals, so they use 75 ohms. Matching the line to 75 ohms minimizes reflections and preserves signal integrity across the frequencies used in these applications. The other values correspond to different uses: 50 ohms is typical for many RF transmitter/receiver systems, 100 ohms is common in some twisted-pair Ethernet and balanced audio, and 60 ohms is not a standard for modern consumer coax.