What is the primary function of a distribution amplifier?

The primary function of a distribution amplifier is to split one input signal into multiple isolated outputs while maintaining the same signal level. This is particularly essential in audio and video systems, where a single source, such as a video camera or audio player, needs to be sent to multiple displays or speakers without degrading the original signal.

Distribution amplifiers are designed to preserve the integrity of the signal by ensuring that all outputs receive the same strength as the input signal. This is critical because if the signal were simply split without amplification, the individual outputs might suffer from signal loss and degradation, leading to poor performance and quality issues. The architecture of a distribution amplifier includes internal amplification components that counteract this potential loss, thereby ensuring that each output remains clear and consistent.

The other choices describe functions that a distribution amplifier does not primarily serve. For instance, amplifying a signal to a higher voltage pertains more to a standard amplifier, while combining inputs pertains to a mixer, and improving signal quality in a transmission line is generally associated with equalizers or signal processors, rather than distribution amplifiers.