AV Technology - March 2008 - (Page 66)

avmo SETTING UP MULTIMEDIA PROJECTORS PHOTO COURTESY PSAV 9. Send a test signal to the projector from the laptop or video player. 10. When the image is displayed, center and level the projected image on the screen by adjusting the legs first. Use the projector’s zoom and focus features to fill the screen with the displayed image, minimally from side to side. 11. You may also need to use the keystone features on the projector to make all four sides of the image square on the screen. 12. Walk into the audience area to see if the image appears to be focused and square from the audience’s point of view. Setting up a projector for temporary use in a typical meeting room or ballroom is simple if you follow a few important guidelines. 1. Set up the projection screen in the proper location. Keep in mind the seating layout for the audience during this step. 2. Place the projector in the proper location. The size of the screen and the type of lens on the projector determine how far away the projector will be from the screen. This measurement is sometimes called “throw distance.” 3. Check to see that there are no chairs immediately next to the projector’s location. Projectors may generate large amounts of heat and fan noise, which might distract the audience. 4. Verify that there is adequate space for the projector. Areas around the projector should have good ventilation and not trap heat. If a projector overheats, it may automatically shut down so it can cool. 66 | AVTECHNOLOGY | march 2008 Source: InfoComm International FINDING THE THROW DISTANCE Multiply the screen width by two. This will approximate the distance from the screen to the projector’s appropriate location. Short on time? Estimate the throw distance this way: Knowing the screen width in feet, stand in front of the screen and take that many walking steps away from the screen. Center the projector cart on that spot. For example, if the screen you are using is 8 feet wide, take eight walking steps straight out from the screen. If you have time, calculate a more precise distance for your specific projector by multiplying the screen width in feet by the lens zoom ratio. For example, assume your screen is 10 feet wide and your lens ratio is 2.0. The distance from the screen to the projector would be 20 feet. 5. Secure the projector to the table or cart with a security cable and lock it to prevent theft. 6. Run all necessary cables to the projector’s location (HD15 for VGA, or RCA, and power cables). Note: Some projectors require substantial power. Use a separate power circuit if you can. 7. Connect the cables and turn on the projector. This may take several minutes. Some projectors have a countdown clock while warming up. 8. Verify that the correct input has been selected on the projector. The projector may have an “auto detect” or “auto image” button, or you may need to toggle through several inputs. Look for an indicator on the screen such as “PC1” or “VGA.” www.avtechnologyonline.com http://www.avtechnologyonline.com

Table of Contents Feed for the Digital Edition of AV Technology - March 2008

AV Technology - March 2008 Contents Precedent Corporate: Whose Job Is It Anyway? Education: There’s No Business Like Show Business Government: Technology and the New World Order Buying a Videoconference System They Will Actually Use AV After Hours The Sound of HD Conferencing Assembling the Design Team Concert Hall Acoustics on a High School Budget Audio Architecture Keeping a Watchful Eye Product Spotlight Tech Horizons Product Review New Products AV MO

AV Technology - March 2008

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