Epiphan Pearl - Manual (Page 162)

Pearl User Guide Configure a source
Value Description
Gain
The Gain and Offset parameters function as contrast control for an image. The
Gain controls the bright parts of the image and Offset controls the darker parts
of the image. Adjust both values to optimize image quality. Adjust the values
using small increments until the image is sharper. If you set Offset to a high
value, set a high value for the Gain to balance the two.
Aspect Ratio
Sets the aspect ratio of the captured image. The default is 4:3. Set the value to
Wide mode when capturing images that have a wide aspect ratio. Using the
incorrect setting causes the image to be distorted or stretched.
Configurable for VGA sources only.
HSync threshold Adjust horizontal sync detection.
VSync threshold Adjust vertical sync detection.
Rotate
This feature is useful when a source captures video that is rotated 90⁰ or is
displayed upside down. Choose one of the following values to change the video
orientation while streaming:
l
No rotation
l
90⁰ clockwise
l
90⁰ counter clockwise
l
180⁰
SDI Signals
The following options are available for signals via the SDI port.
Value Description
Rotate
This feature is useful when a source captures video that is rotated 90⁰ or is
displayed upside down. Choose one of the following values to change the video
orientation while streaming:
l
No rotation
l
90⁰ clockwise
l
90⁰ counter clockwise
l
180⁰
Enable dein- Enable this feature to convert an interlaced source signal to a non-interlaced sig-
149