Datasheet

62
SLES084C − August 2007TVP5146
Luma peak B: Use of the luma peak as a video amplitude reference for the front-end feedback
type AGC algorithm.
0 = Enabled (default)
1 = Disabled
Composite peak: Use of the composite peak as a video amplitude reference for the front-end
feedback type AGC algorithm.
NOTE: Required for CVBS and SCART (with color burst) video sources.
0 = Enabled (default)
1 = Disabled
Color burst B: Use of the color burst amplitude as a video amplitude reference for the front-end
feedback type AGC algorithm.
NOTE: Not available for SECAM, component, and B/W video sources.
0 = Enabled (default)
1 = Disabled
Sync height B: Use of the sync height as a video amplitude reference for the front-end feedback
type AGC algorithm.
0 = Enabled (default)
1 = Disabled
NOTE: If all 4 bits of the lower nibble are set to logic 1 (that is, no amplitude reference selected),
then the front-end analog and digital gains are automatically set to nominal values of 2 and
2304, respectively.
If all 4 bits of the upper nibble are set to logic 1 (that is, no amplitude reference selected), then
the back-end gain is set automatically to unity.
If the input sync height is greater than 100% and the AGC-adjusted output video amplitude
becomes less than 100%, then the back-end scale factor attempts to increase the contrast in the
back end to restore the video amplitude to 100%.
2.11.59 AGC Increment Speed Register
Subaddress 78h
Default 06h
7 6 5 4 3 2 1 0
Reserved AGC increment speed [3:0]
AGC increment speed: Adjusts gain increment speed.
111 = 7 (slowest)
110 = 6 (default)
L
000 = 0 (fastest)