User manual ZENITH PRO880X

[. . . ] These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: · Reorient or relocate the receiving antenna. [. . . ] VERTICAL - - Max duty cycle of sync pulse (Vsync in = 0. 7Vp-p) = 15% Max duty cycle of sync pulse (Vsync in 1. 4Vp-p) = 30%. 3276-A PAGE 15 NOTES PAGE 16 3276-A SCREEN SIZE SELECTION Courtesy of Draper Shade & Screen One of the most important decisions in screen selection is to determine the correct size of screen based upon1. In some situations, these two questions yield the same answer; in others they do not and compromises must be made. Here are the key considerations: Audience Area-In determining the correct size of screen in relation to the audience area, the goal is to make the size large enough so those in the rear of the audience area can see the subject matter easily, but not so large that those in the front of the audience area have difficulty seeing the full width of the projected image. Width-The generally accepted guideline in determining the screen width is the Two and Six Rule: A. Screen width should equal the distance from the screen to the first row of seats, divided by two. Screen width should equal the distance from the screen to the last row of seats, divided by six. In case of a difference between these two guidelines, the one yielding the larger size should prevail. Height-As a rule of thumb, the screen height should equal or exceeding the distance from the screen to the last row of seats, divided by eight. Ceiling height and projection format considerations may modify this standard. Ceiling Height-The bottom of the screen should be approximately 48" above the floor to allow all members of the audience to see the bottom of the projected image. Projection Format-Once you have determined the correct size of the screen based upon the audience area, that size may be based upon the type, or types, of projection equipment to be used. If the display size is changed, to other than 80" width or the unit is to be floor-mounted, completion of the full setup procedure is required. Replacement of a CRT usually requires minor alignment steps (yoke, astigmatator, focus, and re-convergence only for that color). Replacement of modules, in the vertical, horizontal deflection, or convergence systems, usually requires that most all alignment steps are to be performed. Note: The PRO880X unit is shipped with spacer shims between the CRT and lens assemblies, these must be removed to set up the "Scheimpflug (spring/edge)" focus. Mount the PRO880X system according to the prearranged plans agreed upon between the installer and end user. Verify the mounting point, hardware, signal connections, and power connections. Note: It is recommended that preliminary setup be done on the floor before hanging a ceiling-configured system. Adjust the projector's position for no horizontal skew to the display screen. Verify that the Green CRT center is centered to the screen horizontal center. Verify that the setup of steps "a" through "d" has not changed. PRO880X Check Out Before Changes to Configuration IMPORTANT Do Not Connect Power until you verify correct setup of the 120/230 VAC jumper on the 9-1500 power supply. [. . . ] Set for straight bottom edge, line G-H (corners G & H move, center B is stable. ) Set for straight bottom edge, line G-H (middle areas K & M move in opposite direction, center B; and ends G & H are stable). Adjust for straightest line G-H (middle areas K & M move in same direction, center B and ends G & H are stationary). Set right edge F-H straight with respect to screen border (top and bottom move in opposite directions; center D is stable. ) Set for straight right edge, line F-H (corner F&H move, center D is stable. ) Set for straight right edge, line F-H (middle areas O & Q move opposite and center D and ends F & H are stable. ) H. `S' 206-3634 PAGE 25 PAGE 26 206-3634 SYSTEM ALIGNMENT DIGITAL DISPLAY SETUP PROCEDURE CONVERGENCE OF RED AND BLUE ONTO GREEN It is desirable to Mute color you are not adjusting. [. . . ]