Now that HDMI sources and displays are commonly available many of us have bought components with these connections.
Due to high bit rates and their demanding specifications for signal integrity DVI and HDMI sources have inherent cable length limitations. For copper cables, there are two primary options to overcome these limitations: Repeaters and Extenders.Repeaters:
Repeaters actually receive, decode and retransmit the digital signal. In doing so they help minimize signal jitter and other degenerative effects intrinsic in long cables runs.Extenders:
The most common type of Extender today is a dynamic equalizer. Long cables suffer from high levels of insertion losses caused by cable capacitance. These devices help mitigate insertion losses by restoring lost high frequency components of the digital signal using adaptive equalizer technology. While equalizers are usually very effective for long cable runs, they do not digitally regenerate the signal as a repeater would.