Description
PVP adjusts the vertical position of the RGB PIP.
Argument
The allowable range is 0-600 base10. The position of the PIP is based on a relative location system. Every two display pixels is equal to “1” relative location increment. The origin (0,0) is the upper-left hand corner of the display, with 800,0 being the upper-right, 0,600 is the lower-left, and 800,600 being the lower-right. Taking into account the 2:1 ratio a value of 300 will place the RGB PIP’s upper-left hand corner at the half way point vertically on the display.
NTSC PIP
The following commands are those that act on the NTSC PIPs contained in the display confi guration.
PCK
Description
PCK toggles the chroma key feature ON/OFF.
Argument
Provide a “1” for ON and a “0” for OFF.
PDS
Description
PDS has the display place all of the NTSC picture-in-picture settings back to the factory defaults.
Argument
No arguments.
PHB
Description
PHB sets the upper-bound of the blue portion of the RGB value used for chroma key. The upper-bound of the color is determined by taking the color value that is desired (0-255) and adding a guardband value to take into account accuracy limitations of the hardware. The upper-bound limit is still 255 even with the guardband.
Argument
The allowable range is 0-255 base10. The default value is dependent on which one of the PIPs being addressed. There are currently four chroma key colors used as default colors they are the following:
default for PIP 1 = Cyan (R:0,G:255,B:255)
default for PIP 2 = Magenta (R:255,G:0,B:255)
default for PIP 3 = Chartreuse (R:135,G:255,B:0)
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Doc# 27-0023UM Rev 1.0 Issued 09/04