A switcher allows you to switch between your sources. A scaler takes all of your video signals and scales them up to a higher resolution to match your computer's resolution (which should also be the native resolution of your projector). Be warned! There are several consumer grade switcher/scalers on the market that use low quality scaling engines; your image quality can be significantly impacted by using one of these.

When using a switcher/scaler you can choose to go with a single scaler or a dual. Single scalers allow simple dip to black transitions, whereas a dual scaler will allow for all of your effects like cross fades, wipes, cuts, etc. Again the one best suited for your needs will be determined by the direction you want to go with your system - the use of cameras being the biggest question. With cameras we always recommend a dual scaler. Whether or not you are doing High Def will determine which dual scaler.

Some people try to save a little money and use their projector as the switcher. They simply plug their sources into the projector and then switch sources using the remote. The downside is that your projector will not do the scaling as well and remotes can be unreliable (if you do this make sure you hard wire your remote). Delays, glitches and unwanted on-screen text often occur, and most projectors don't even allow you to easily select the source you need - you have to hit the input button until you get to the source you're looking for.

Traditionally, if you planned on using cameras, you could use a video mixer instead of a switcher/scaler. The primary difference is that rather than scaling all of your sources up to a higher resolution, you will need a scan converter to convert all of your signals down to video. If you do this though, the quality of your computer images will suffer. But now that switcher/scalers are available, this isn't even an issue.

6. Develop Your Infrastructure:

The infrastructure of your media system is HUGE when it comes to the quality and success of your entire system. You can install a $100,000 projector with low quality cable or leave out a distribution amplifier and your image will look terrible! And a lack of planning on your infrastructure will hinder your ability to add to your system in the future. So, decide now - will you ever want to add:

Cameras

Choir confidence monitors

Multiple screens

Digital signage in the lobby

Recording and duplicating equipment

If so, do you only want camera feed or will you want everything that's on the screen?

Your infrastructure may cost as much as your projector and screen, but you want to do it right the first time. You should only have to plan routes and pull cables once; after that it will be very simple to add to the system as your ministry grows.

7. Choose The Best Sources: