Sim2 Multimedia HTL40 Colour Temperature, Gamma Correction, Overscan, Position, Frequency/Phase

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PANORAMIC: stretches the 4:3 image, slightly cropping the upper and lower parts. Panoramic is ideal for displaying a 4:3 image on the 16:9 screen of the Display.

PIXEL TO PIXEL: displays the image as it is input without adapting it to the screen.

The image is projected in the centre of the screen and if its hori- zontal and/or vertical dimensions are smaller than the display, it is bounded by vertical and/or horizontal black bands.

USER 1, 2, 3: when none of the preset formulas are suitable, the User formulas are available, with the facility for continuous horizontal and vertical adjustment of picture size.

COLOUR TEMPERATURE

Changes the colour balance of the image and is referred to the co- lour temperature of white. Colours can be adjusted towards the red end of the spectrum (low colour temperature values - expressed in degrees Kelvin) or the blue end (high values). Colour temperature can be selected with three preset values: HIGH, MEDIUM and LOW. In addition, a USER setting is provided in which the user can set the white point by making separate adjustments for Red, Green and Blue.

Generally, the HIGH value is more suitable for displaying graphic images, while MEDIUM and LOW values are preferable for video images.

GAMMA CORRECTION

Determines the system’s response to the grey scale, emphasising or attenuating the different grades of brightness (blacks, dark, medium, light grey, whites) in the projected image. The GRAPHIC setting is more suitable for computer images, while the VIDEO and FILM settings are more suitable for video images.

OVERSCAN

Eliminates irregularities around the outer borders of the image. Certain relatively inaccurate sources can produce an image with more or less pronounced irregularities around the outer edges; thanks to the overscan function these imperfections can be moved to outside the displayed area. Overscan values can be between 0 (no overscanning) and 32 (maximum overscanning). The result- ing image always maintains the selected aspect irrespective of the selected overscan value.

POSITION

Use this adjustment to position the image vertically and horizontally. Determines the aspect of the displayed image.

These parameters do not normally require adjustment because the system examines the input signal and automatically sets the most suitable values. However, if the image is not perfectly centralised it may prove useful to repeat the input signal analysis and the consequent image positioning procedure. This automatic control procedure is activated by pressing key “A” on the remote control. When this procedure is called it is helpful to have a white or light coloured background on the screen in the current picture.

FREQUENCY/PHASE

These adjustments, available for progressive signals and for signals from a PC, ensure correspondence between the number of pixels making up the signal and the number of pixels that make up the projected image.

These parameters do not normally require adjustment because the system examines the input signal and automatically sets the most suitable values. However, if the image appears disturbed (loss of resolution within equidistant vertical bands or instability and lack of sharpness on narrow vertical lines) it may help to prompt the system to repeat the input signal analysis and consequent determination of the frequency and phase parameters. This automatic control proce- dure is activated by pressing key “A” on the remote control.

If the automatic procedure fails to have the required effect, enter the frequency and phase values manually and move sufficiently near to the screen to observe the effects of the adjustments.

Y/C DELAY

In the case of Video and S-Video signals, it may be necessary to correct horizontal colour misalignment within the projected image. For a given video standard (e.g. PAL or NTSC) the stored value does not normally require further fine-tuning, unless the source or connection cable is changed.

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