Grass Valley Trinix NXT v.3.3.1 - Manual (Page 157)

Trinix NXT — Installation and Service Manual 157
Sync Reference Connections
Sync Reference Connections
For synchronous vertical interval switching, the same sync reference signal
must be sent to the control system and to the Trinix. (Trinix will operate
without a sync connection but switching will be non-synchronous.) For
SMS 7000 and Encore systems, sync must be connected to the Sync 1 input.
Note Some TRX-NXT-512x512 power supply units are not labeled correctly. See
Figure 68 on page 141 for correct REF IN connector labeling.
The SR-33000 Sync Reference / OPM board
The following can be used to lock the system to Reference sync:
• The NR-33000 NIC/Sync/OPM board
• The SR-33500 Sync Reference board (in TRX-NXT-512x512 units)
• The TRX-SR board (in the Trinix Asymmetrical frames).
The video standard operation (That is, NTSC, PAL, or HDTV.) is auto-
detected by the system. The sync signal can be video, black burst, 2 V com-
posite sync, 4 V composite, or tri-level (HD). Each sync input uses looping
75-ohm BNC connectors; if a loop through is not used, the loop BNC should
have a 75-ohm termination.
For an illustration of the rear panel connectors, see Figure 63 on page 136
(128 x 128); Figure 65 on page 138 (256 x 256); Figure 68 on page 141 (512 x
512); Figure 70 on page 143 (128 x 256); or Figure 72 on page 145 (256 x 512).
For the TRX-OPM Board DIP switch setting, see Configuring Each Output
Monitor on the TRX-OPM Boards
on page 130 .
The sync source must also be selected on each output board (as described
in the
Output Board Configuration section on page 185.)
The Sync Redundant switch mentioned in the system drawings below is on
the rear panel of the frame.
Frames with Single Sync Reference
In the example shown in Figure 79 on page 158 , the Single-Sync reference
is sent to Encore and Jupiter control system and to a single connection on
the Trinix router. For example, TRX-NXT-128x128, TRX-NXT-256x256, and
TRX-NXT-512x1024.
The sync redundant switch is located between the OP Expand and INT XPT
switches on the rear of the Router chassis.