Which technology led to the expansion of cable system channel capacity in the 1980s?

Which technology led to the expansion of cable system channel capacity in the 1980s?

• A. Fiber optic technology
• B. Microwave relay
• C. Satellite downlink
• D. Coaxial upgrades

Answer: (A)

The growth in cable system channel capacity during the 1980s came from fiber optic technology because it delivers vastly higher bandwidth with far lower signal loss than copper. Replacing or supplementing copper trunks with fiber lets the backbone carry many more channels, especially as techniques like wavelength-division multiplexing multiply the information carried on a single fiber. This shift provided the scalable, high-capacity backbone that enabled a rapid expansion of available channels. Microwave relay and satellite downlink played important roles in distribution but don’t offer the same scalable backbone capacity as fiber. Upgrading coaxial cable helps, but copper’s bandwidth and loss limitations cap how far you can push capacity. Fiber’s ability to carry far more data over long distances is what unlocked the expansion.

The growth in cable system channel capacity during the 1980s came from fiber optic technology because it delivers vastly higher bandwidth with far lower signal loss than copper. Replacing or supplementing copper trunks with fiber lets the backbone carry many more channels, especially as techniques like wavelength-division multiplexing multiply the information carried on a single fiber. This shift provided the scalable, high-capacity backbone that enabled a rapid expansion of available channels.

Microwave relay and satellite downlink played important roles in distribution but don’t offer the same scalable backbone capacity as fiber. Upgrading coaxial cable helps, but copper’s bandwidth and loss limitations cap how far you can push capacity. Fiber’s ability to carry far more data over long distances is what unlocked the expansion.