•Fine Sync: To
Figure 4-18: Fine Sync Sub-Menu
•V Position: This control adjusts the vertical position of the image within the designated image area, up to 25 per- cent of the image height up or down.
•H Position: This control adjusts the horizontal position of the image within the designated image area, up to 25 percent of the image width left or right.
•Phase (RGB or Component sources): This control adjusts the phase of the pixel sampling clock relative to the incoming signal. Adjust the phase when an RGB or Component image still shows shimmer or “noise” after Tracking has been optimized.
Adjust the Phase after adjusting Tracking (see below). If some shimmer from a video or HDTV
Tip source persists, use the Noise Reduction controls (described on page 44) to remove
For best results, use a good test pattern such as a smooth gray consisting of a clear pattern of black and white pixels, or a similar “half on, half off” graphic image. Adjust the slidebar until the image stabilizes and each pixel is clearly defined. You may notice that you can stabilize the image at more than one point. Use either setting in such cases.
•Tracking (RGB or Component sources): Tracking determines the frequency of the pixel sampling clock, indicat- ed by the number of incoming pixels per line, so that all pixels generated by a particular source are sampled. Steady flickering or several soft vertical stripes or bands across the entire image indicates poor pixel tracking. Proper pixel tracking helps ensure that the image quality is consistent across the screen, that aspect ratio is maintained and that pixel phase (see above) can be optimized.
•Sync Level (Component sources only): Select Sync Level to adjust the voltage level of the LED1081 Sync signal detection circuitry.
Sync Level adjustment is occasionally necessary when a DVD player or HDTV source signal drops “below black” (for example, during scenes with explosions or when subtitles are present) and causes the projector to temporarily lose sync. If the Sync Level from the source is persistently too low, the projector won’t sync with the source at all.
The range is from 50 to 256 millivolts (mV) inclusive. The default setting is 240 mV and should rarely require ad- justment.
operaTion 51
