Output mode – global presets, Exact output timing, Cms menu – Lumagen Radiance 2144/2124 User Manual

Page 23: Gamma factor, Color gamut, Grayscale and gamma, Color decoder, Black level

Section 5 – Video Configuration

Radiance 2124 and 2144, Rev 051514

Output Mode – Global Presets

This command is not generally needed. However, it can be useful when driving displays that do not report EDID

and where no video is visible until a specific format is sent. It changes the

Output Mode for all Inputs and input

memories. Select the

Output Mode from the table below. The command is:

MENU → Output → Custom Modes→ [Custom] → Select Mode → OK

The direct commands to select output resolution are:

480p60: MENU 0 2 1 OK

540p60: MENU 0 2 2 OK

720p60: MENU 0 2 4 OK

768p60: MENU 0 2 5 OK

1080p60: MENU 0 2 7 OK

Exact Output Timing

After selecting a Custom Output Mode, its timing can be modified on a pixel basis. Do not change the timing using

this menu unless it is really needed. Some digital displays lose picture if timing is changed by even a single pixel.

The command is:

MENU → Output → Custom Modes → [Custom] → Timing → Mode Timing

CMS Menu

The Color Management System (CMS) stores settings used to calibrate the color of the display. There are menus to

calibrate the position of the primary/secondary color points, calibrate grayscale tracking, calibrate the gamma

curve, and compensate for red/green push errors.

Gamma Factor

The Gamma Factor adjusts the gamma of the video output up or down. Since the Radiance is in the middle of the

video chain, its default goal is to not affect the image Gamma and so the default Radiance gamma is 1.00.

Changing the Gamma Factor allows the Radiance a “coarse correction” control for display Gamma. It should be set

to (Desired_Gamma / Measured_Gamma). The command is:

MENU → Output → CMS’s → [CMS] → Gamma Factor → OK

Color Gamut

Allows primary and secondary color point calibration, or calibration of 729-points throughout the linear-Gamma

RGB color cube, using a linear-Gamma 3D color lookup table (LUT). A color probe and appropriate calibration

software is necessary for proper adjustment. The command is:

MENU → Output → CMS’s → [CMS] → Color Gamut

Grayscale and Gamma

Allows the parametric adjustment of 2, 5, 11, 12 or 21 color temperature points to adjust the grayscale and

gamma for the display. The command is:

MENU → Output → CMS’s → [CMS] → Gray/Gamma

Color Decoder

Used to correct color decoder errors in the display that have red and/or green push. This adjustment should

generally

not be used in conjunction with Color Gamut. The command is:

MENU → Output → CMS’s → [CMS] → Color Decoder

Black Level

Used to set the black level for the display. Normally the “Brightness” or “Black Level” control in the display is used

to set the black level. However, some displays cannot be set accurately. This command allows for accurate

calibration when the display controls are not adequate. It is recommended that the Radiance Contrast Pattern 2

(dark contrast) be used to set the display’s black level. This command is also useful when a second black level is

desired (using a second output CMS) for a “day” or “night” mode. The command is:

MENU → Output → CMS’s → [CMS] → Black → Ok