Operation Manual

Niagara SCX User Guide
ViewCast 53
Tab
Description
of cameras and TV sets in broadcast use.
— This usually, however, does not match the needs of computer-
based applications or the response curves of computer monitors.
— Therefore, you often need a correction inverse to the original bias
and you may want to tune for the characteristics of a particular
monitor.
 When you disable the gamma correction filters:
— Set the gamma correction value to exactly 1.00.
— The software-based gamma filter works in pass-through mode with
no effect on the video and no processing bandwidth use.
— Uncheck the Gamma checkbox.
 When you enable gamma correction, the text box shows the factor
applied.
 If running preview video while adjusting the filter, you see adjustment
effects interactively.
 You can use one of three methods to adjust the gamma correction
value:
(1) Directly enter text in the numeric text box.
(2) Click [+] and [-].
(3) Select Signal field (NTSC, PAL, or SECAM) from the options list.
 Gamma correction applies to all filters and output pins on each device.
 The gamma correction can be different for different physical devices.
NOTE: These values represent the inverses of the gamma bias that you applied at the video
source per the video standard so the resulting video becomes gamma-neutral.
Tuning Utilities
Access the Tuning Utilities for a selected card.
NOTE: Refer to Chapter 11: Tuning Utilities for additional
diagnostics information.
Audio Settings
 View the input source options for selected audio devices (Figure 70).
 Makes left and right volume levels available for adjustments if the
audio capture device supports them.
 Fields remain available whether device runs or remains idle.