Sync Reference Connections
Planning and Installation Manual 107
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-synchro-
nous.) For SMS 7000 and Encore systems, sync must be connected to the
Sync 1 input.
Note Some DV-33512 power supply units are not labelled correctly. See
drawing on page 102 for correct REF IN connector labelling.
The SR-33000 Sync Reference / OPM board, the NR-33000 NIC/Sync/
OPM board, or (in DV-33512 units) the SR-33500 Sync Reference board
can be used to lock the system to reference sync. Video standard
(NTSC/PAL/HDTV) operation is auto-detected by the system. The
sync signal can be video, black burst, 2 V composite sync, 4 V com-
posite, or tri-level (HD). Each sync input uses looping 75 ohm BNC con-
nectors; 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
page 98 (128 x 128); page 100 (256 x 256); or page 102 (512 x 512).
The sync source must also be selected on each output board (as
described on page 123.)
The “Sync Redundant” switch mentioned in the following system
drawings is on the rear panel of the chassis.
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