DLV1280-DX User Manual - Christie Digital Systems

GLOSSARYscreens with gain more than 1 direct more incident light to the audience but have anarrow viewing angle. For example: An image reflecting off a 10 gain screen appears10 times brighter than it would if reflected off a matte white wall. Curved screensusually have larger gain than flat screens.Help Screen 'Horizontal Frequency 'Horizontal Offset 'Hot Spot 'A display of help information regarding the current task or presentation.The frequency at which scan lines are generated, which varies amongst sources. Alsocalled horizontal scan rate or line rate.The difference between the center of the projected image and the center of theprojector lens. For this projector, this value is expressed as the maximum percentageof the image that can be projected to one side of the lens center without degrading theimage quality. Horizontal offset ranges can be affected by the type of lens in use, andwhether or not the image is offset vertically at the same time.A circular area of a screen where the image appears brighter than elsewhere on thescreen. A hot spot appears along the line of sight and "moves" with the line of sight.High gain screens and rear screens designed for slide or movie projection usuallyhave a hot spot.ILS ®'The VistaGRAPHX Intelligent Lens System ® describes the ability of VistaGRAPHXprojectors to automatically return to lens settings previously defined for a particularchannel.Input 'Input Signal 'Interface 'Interlace 'Keypad 'Keystone 'Linearity 'Line of Best Viewing 'Loopthrough '(Loopthru)A physical connection route for a source signal, described by a 2-digit numberrepresenting 1) its switcher/projector location and 2) its slot in the switcher/projector.Signal sent from a source device to the projector.A device, such as the Serial Digital Input Module, that accepts an input signal fordisplay by the projector.A method used by video tape players and some computers to double the verticalresolution without increasing the horizontal line rate. If the resulting frame/field rateis too low, the image may flicker depending on the image content.A small push-button device for controlling most projector settings and operation. Formore information, refer to 3.3, Using the Keypad.A distortion of the image which occurs when the top and bottom borders of the imageare unequal in length. Side borders both slant in or out, producing a “keyhole” shapedimage. It is caused when the screen and lens surface are not parallel.The reproduction of the horizontal and vertical size of characters and/or shapes overthe entire screen.When light from a projector is incident on a screen, the light reflects from the screensuch that the angle of reflection equals the angle of incidence. The Line of BestViewing is along the line of reflection.The method of feeding a series of high impedance inputs from a single video sourcewith a coaxial transmission line in such a manner that the line is terminated with itscharacteristic impedance at the last input on the line.DLV1280 DX User’s Manual A-3