Sony BVMF250A User Manual (Operating Instructions - BVM-F250A / BVM-F170A) - Page 39
Brightness/Contrast Adjustment, HD signal
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Chapter 2 Preparations Brightness/Contrast Adjustment As an image on a color video monitor is seen differently according to the ambient light (environmental brightness), adjust the brightness (black level) according to the ambient light and the black level of the image to be reproduced and adjust the contrast (white level) according to the ambient light. Adjust the brightness/contrast with an external reference signal of a multi format color-bar signal or SMPTE colorbar signal. 1 Input the multi format color-bar signal or SMPTE color-bar signal to the monitor. The following are explained as the example when the multi format color-bar signal is used for adjustment. 2 Select the Manual Adjust menu (page 51) in the Picture Adj menu of the Adjustment menu. 3 Adjust the -2%, 0% and +2% ranges or the 0%, +2% and +4% ranges of the PLUGE signal section of the color-bar with the BRIGHT knob. HD signal Adjust so that the -2% and 0% ranges are seen as equal and the +2% and 0% ranges are more distinctive. SD signal Adjust so that the 0% and +2% ranges are seen as equal and the +2% and +4% ranges are more distinctive. 5 As the brightness and contrast adjustments affect each other, repeat the adjustments of step 3 and 4. 6 Press the ENTER or Ent button. Note You can access manual adjustment without opening the Adjustment menu. To access it, press the MANUAL button located below the BRIGHT or CONTRAST knob of the controller. If manual adjustment is accessed by this method, the adjusted value is common to all channels and valid only when the lamp of the MANUAL button is lit. To turn off the lamp of the MANUAL button, press the button again. SD HD +4% 0% -2% +2% 0% 4 Adjust so that the luminance of the 100% white signal of the color-bar is set to the desired value with the CONTRAST knob. We recommend adjusting the luminance to 100 [cd/ m2] when Preset1 to Preset5 is selected in the Picture Preset menu of the Channel Configuration menu. 39 Adjusting