17
.
APPENDIX C: DC Restore
Appendix C. DC Restore to fix Green Shift
of AC Coupled Signals
The standard MultiView product is designed to function with DC coupled signals with
the black level referenced to 0 volts. Nearly all VGA cards function this way. However,
some media servers or digital camera devices provide AC coupled signals and can
cause a green color shift in the video. This is a result of the sync clamping on the Red
and Blue channels in the MultiView. The MultiView XRTx Universal transmitter has
been designed with full DC restore capability. A simple switch setting is all that is
required.
The following diagrams show the switch location and settings for the XRTx
Universal Transmitter assembly.
Note: Switch settings other than shown below may result in unpredictable performance
and are not supported by Magenta Research.
15
DC restore / AC coupling options:
Disable: AC Coupling to A
(Default) DC Restore to A
Internal SW5 position 1 OFF (default)
Mode 1 AC Coupling to B
Enable DC Restore to B
Internal SW5 position 1 OFF (default)
Mode 2 AC Coupling to B
Enable DC Restore to A
Internal SW5 position 1 ON
