The proliferation of dazzling new display technologies has led to the development of new applications. Digital signage is one such application. Typically, a server receives digital video content over a network and then outputs the information through a VGA port on the server. A distribution amplifier (DA) may distribute the video content to multiple screens within the premises. Retail stores, airports, hotels and restaurant chains are some of the key users. Balun technology enables these multiple displays to be connected to the video server via Cat5 instead of coaxial AV cable yielding considerable cost savings and preserving the investment in pre-existing cable.
Figure 3: Typical Digital Signage Application
Active, or powered video baluns that amplify and equalize the video signal are capable of supporting extended cable lengths over Cat5 at image resolutions up to 1920 x 1440 pixels, thus placing new applications within distance reach. For example multi-screen video kiosks may be deployed in large stores or public areas more easily where pre-installed Cat5 cable is available.
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