What is monitor loopthrough?
An output on the projector or large-screen monitor that allows you to connect additional monitors or projectors to display the same image. A loopthrough output is commonly used to run a desktop computer monitor at the same time the computer image is being projected–thus allowing you to sit or stand at the computer and always face your audience. Another way to accomplish this goal is to supply a Y-cable with the projector, which allows you to split the signal between your monitor and your large-screen device. Note that this type of Y-cable must be designed specifically for your projector by the manufacturer. Use of the wrong Y-cable with computer signals can damage your equipment. Generally, monitor loopthrough is not helpful if you’re using a laptop computer. The laptop’s internal circuitry must split the signal between the laptop’s monitor and the external device. Most laptops have such circuitry; some do not.
