Ross Opengear UDC-8625A Series, User Manual, Page: 33 / 174

UDC-8625A Series User Manual (Iss. 11) Installation • 2–13
Video Cabling Overview
This section provide information on cabling the video inputs, video outputs, and reference signal
for your card.
For More Information on...
• equalization specifications when using Belden 1694A or equivalent coaxial cable for SDI
connections, refer to “ Appendix B. Specifications ” on page 10-1.
Power Fail Relay (8310AR-033, 8320AR-033, and 8320AR-055)
There is a power fail relay from the SDI IN 1 to SDI OUT 1 on the 8310AR-033, 8320AR-033,
and 8320AR-055 rear modules only. The purpose of this relay is as follows:
• When the card is removed from the frame, the relay passes video from the SDI IN 1 to
SDI OUT 1 of the card. This allows the card to be serviced with minimum interruption to
the video signal.
• If the card loses power, or the frame loses power, the video still passes through.
• When the card boots, the relay will be left in Bypass mode until the card can generate a
valid output. Once the card is functional, the relay is disabled.
SDI Input Cabling Overview
There are more input functions than there are SDI IN connections. Before cabling the
UDC-8625A series card, consider the following functionality and limitations provided in
Table 2.2 .
Table Notes
1. When the Auto Change Over feature is enabled in the On Air Control tab, SDI IN 1 is
the primary format conversion source, and SDI IN 2 is the backup format conversion
source. When SDI IN 1 is unavailable, the card will automatically switch to SDI IN 2.
Table 2.2 Input Designations
Function
SDI IN
1
4 2 3
4
a
a. SDI IN 4 is unavailable when using the 8322AR-065 rear module.
Conversion Source
1
 
Primary Source
1

Backup Source
1

Relay Source
2

Wing Source

5

5

3

3
Key Video Source

3
Key Alpha Source

3