Data Translation DT3152-LS, Руководство пользователя

Страница: 129 / 214

Programming Flowcharts
113
4
4
4
4
4
4
4
4
4
Set the Standard Controls for the Input Source (cont).
Continued from previous page.
Go to the next page.
Set the clamp start and end with
OlFgSetInputControlValue.
Use the key OLC_FG_CTL_CLAMP_START to set the
clamp start position and OLC_FG_CTL_CLAMP_END to
set the clamp end position of the active video area. For
area-scan mode, the default clamp start is 93 for 60 Hz
and 90 for 50 Hz; the default clamp end is 95 for 60 Hz
and 93 for 50 Hz. For line-scan mode, the default clamp
start is 90 and the default clamp end is 95.
Set the first active pixel with
OlFgSetInputControlValue.
Use the key OLC_FG_CTL_FIRST_ACTIVE_
PIXEL to set the first active pixel on the line. For
area-scan mode, the default is 125 for 60 Hz and 160 for
50 Hz. For line-scan mode, the default value depends on
the camera.
Set the active pixel count with
OlFgSetInputControlValue.
In area-scan mode only, use the key
OLC_FG_CTL_ACTIVE_PIXEL_COUNT to set the
number of pixels per line in the active area. The default
is 640 for 60 Hz and 768 for 50 Hz. This is not used for
line-scan mode.
Set the back porch start with
OlFgSetInputControlValue.
For area-scan mode only, use the key
OLC_FG_CTL_BACK_PORCH_START to set the back
porch start position in the horizontal signal. The default
value is 60 for 60 Hz, and 80 for 50 Hz. This is not
supported for line-scan mode.