Lumagen VisionHDQ - Manual (Page 35)

VisionHDQ ™
User Manual and Installer Guide
© 2004-2007 Lumagen®, Inc. 32 Rev 1.14
For Optimal Picture Quality
• Proper calibration is as important for attaining the best picture as deinterlacing and scaling. If
you don’t have one, purchase a DVD setup disc, such as AVIA ® or Digital Video Essentials ® and
watch the training lessons provided. Then follow the calibration instructions on the disc and in
this manual.
• Using high-quality cables is a very important part of video quality.
• Use a power conditioner for the video source, video processor and the display. Power line noise
is at least as important an issue for video as it is for audio.
• Use the DVI-D output if supported by the display. For analog displays, RGBHV is preferable to
component.
• For display of PC generated data, such as spreadsheets, the PC resolution should be set to
match the native resolution of the display and the Lumagen should be in “pass-through” mode
(MENU
→ IN → CONFIG → ADJ → SCALE → [ˆ, ‡] OK).
• Avoid running video signals through the video switch inside receivers, as these tend to degrade
video quality. Also, the Lumagen provides independent configuration memories for each input.
Using the Lumagen to switch the video allows these configuration memories to be
automatically selected for each source.
• Component inputs on some displays do not work with standard width HSync pulses. When
using component video to drive the display, if there is a “green cast”, the likely cause is the
circuitry inside the display. Making the HSync pulse narrower with the Lumagen HSync Width
command (MENU 0 9 4 0) may eliminate this problem.
• A system’s “ground loop noise” can cause visible horizontal banding, or other problems. Since
the Lumagen case “floats” with reference to ground, it may need to be grounded to the video
source or display. Use approximately 18-guage wire to connect the case of the Lumagen to a
chassis ground on the video source or display. Eliminating the ground connection on the
Lumagen wall plug can also resolve the issue, but check local electrical codes before trying
this.
• For standard definition programming using cable/satellite set top boxes, it is best to have the
set top box output standard definition interlaced video (480i or 576i). This allows the Lumagen
to deinterlace and scale the video rather than the set top box. If this is not supported, use
480p output for standard definition programming. When the set top box outputs standard
definition material as 1080i or 720p, the Lumagen can do much less to improve the quality of
the image.
• Each input has four configuration memories. These are memory A (MEMA ), memory B
(MEMB), Memory C (MEMC), memory D (MEMD). These memories can be used to have four
independent configurations, such as for day (bright room) and night (dark room). In this
example, the black level would be set higher for viewing in a bright room than for viewing in a
darkened room. To use MEMA and MEMB for day/night, first setup MEMA normally, SAVE the
settings. Then use the input copy command to copy the setup to MEMB. Then adjust MEMB as
desired for a different black level setting.