RF Modulation, Providing Easy Access to Distributed Video
By Steve Briggs
Balance in RF modulation is an important concept for just about any audiovisual technician to master. Especially if they are going to be getting into home technology integration or want to become a home theater installer. Clients are asking for the ability to watch video on multiple televisions throughout the home utilizing the home’s existing wiring. This video could be a source such as their Blu-ray player, Satellite Receiver (high definition modulation over Co-ax cable is available and reliable) or standard analog devices such a basic security camera outside the front door. Proper AV training can help inform the technician about which devices are available for this application. Signal injection and modulation play an important role in this process as well as balancing of the signal that is being split up and fed to different sources. If the modulator being used does not meet signal strength requirements picture quality issues can occur. After the signal is modulated it will need to be combined with the client’s cable or off air signals. The AV training that is offered here at MMI will address this and other areas of concern in regard to whole-house video.
Basic Wiring Diagram for Modulated System