Signal Capture
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VGA Grid User Guide
VGA input sources are connected to a DVI Single-Link port using the VGA to DVI
cable, Figure 6 VGA to DVI cable.
HDMI input sources are connected using the HDMI to DVI adapter, Figure 8 HDMI to
DVI Adapter should only be non-copy protected content.
6.1.2
Connecting Audio Input Sources
All audio sources are connected to the VGA Grid using the audio input port.
6.2
Sources Setup
This section explains how to configure the digital and composite sources connected
to the VGA Grid.
6.2.1
Digital source setup
A frame grabber is an electronic device that captures individual still frames from a
video source and transmits them in a digital form. The number and technical
characteristics of the Epiphan frame grabbers (VGA and/or DVI) installed in the VGA
Grid depend on the ordered product configuration. They capture video from the
local sources, are subsystem components in the VGA Grid and can be configured
separately. Serial numbers of the internal frame grabbers installed in the VGA Grid
are displayed under the Sources title in the left part of the Web admin interface. In
our example it is D2P83385.
The VGA Grid automatically adjusts image capture settings every time it starts up.
The automatic image adjustment is repeated every 60 seconds during operation.
The interval between automatic adjustments can be changed to have them occur
more or less often. The capture settings attempt to produce the best quality
captured image for the equipment being used.
Normally, making manual image adjustments should not be necessary. This means
that there are no default Frame Grabber adjustment settings. However, special
requirements may exist that produce image quality problems that can only be fixed
by making image adjustments.
The Frame Grabber adjustments page within the Web admin interface contains
most of the information needed to make image adjustments. This includes a brief
description of the effect created as a result of each adjustment and the adjustment
range.
