What type of equipment is used to provide high-frequency voltages for voice communication on high voltage transmission circuits?

The use of carrier equipment for providing high-frequency voltages in voice communication on high voltage transmission circuits is fundamental to the operation of Power Line Communication (PLC) systems. Carrier equipment allows voice or data to be superimposed onto the power transmission lines by modulating the signal onto a high-frequency carrier wave, enabling effective communication without interfering with the primary function of the power lines.

Carrier systems work by translating incoming voice signals into a form that can be efficiently transmitted over high voltage lines. This technology takes advantage of the existing electrical infrastructure, allowing for voice communication to occur simultaneously with high voltage power delivery. Thus, carrier equipment is specifically designed to handle the necessary modulation, transmission, and reception of these high-frequency signals, ensuring clear communication over long distances.

In contrast, modulators function mainly to encode information onto a carrier wave but do not encompass the entire functionality of transmitting those signals over power lines. Amplifiers increase the power of electrical signals but are not responsible for the initial modulation needed for voice communication. Transmitters are involved in sending signals but do not necessarily imply the integration with power line communication systems in the same specialized manner as carrier equipment does.