Ross Opengear UDC-8625A Series, Руководство пользователя, Страница: 34 / 174

2–14 • Installation UDC-8625A Series User Manual (Iss. 11)
When the Auto Change Over feature is disabled, either SDI IN 1 or SDI IN 2 can be
used as a format conversion source, and the user can cleanly transition between them.
2.
When using the 8310AR-033, 8320AR-033, or the 8320AR-055 rear modules, the
Bypass Relay source will be routed to SDI OUT 1 if the card is unavailable. You may
want to provide a valid input of the desired output format on SDI IN 1.
3.
SDI IN 3 and SDI IN 4 only provide Line Sync functionality when the output format is
1080p (3G). SDI IN 3 and SDI IN 4 provide Frame Sync capability for other output
formats.
4.
When using the 8310AR-033, 8320AR-033, or 8320AR-055 rear modules, SDI IN 1 and
SDI OUT 1 are connected to a Bypass Relay, and do not meet 3G return loss
specifications.
5.
When using SDI IN 1 or SDI IN 2 for the Wings source, the Wings will be fed from
before the format converter. Refer to
Figure 1.1 .
Cabling a Reference Source
Use the following procedure to cable the reference source for your card:
1.
If you wish to use the frame reference input, connect the reference input to the
REF1
or
REF2
input on the openGear frame.
2.
If you wish to use an local reference input, connect the reference input source to the
REF IN
connector on your rear module.
3.
If you are using the local reference input on the rear module, you must also configure
J7
on the card-edge. Choose from the following:
• Pin 1 (left) + Pin 2 (center) position — In this position, the reference is terminated
with an 75ohm resistor. This configuration is to be used for point-to-point cabling,
or on the last card of a daisy chain topology. This is the default position. (
Figure
2.2 )
• Pin 2 (center) + Pin 3 (right) position — In this position, the 75ohm terminator is
removed and the reference is not terminated. This configuration is used in a daisy
chain cabling topology where only the last card is to be terminated.
For More Information on...
• configuring your reference source in DashBoard, refer to the section “ Selecting the
Reference Source ” on page 3-4.