Controlling the Switcher
12
7.3 Adding Inputs
Up to eight
OMX-SW6x1B
switchers can be interconnected to function as a
12x1 or an 18x1 switcher, as follows:
1. Make sure that jumper J35 in at least one of the switchers is set to its factory
located position. If necessary, carefully remove the covers of the switchers to
do so.
2. Connect a straight, 9-wire flat cable from the "To Next" DB-9 connector on
the first switcher to the "To Next" DB-9 connector on the second switcher,
from the second to the third and so on, until all the required switchers are
interconnected. Make sure that the interconnecting lengths of cable are as short
as possible.
3. Interconnect the switchers via their RS-485 ports ("A" to "A", "B" to "B", and
so on).
4. Assign a unique machine number to each of the switchers (see Table ).
5. On all the units, set the Dipswitch "Reply" option to ON.
6. To feed the sync information from one of the units to all the others,
interconnect the units via their "To Next" connectors using a flat cable. In this
case, jumper J34 must be set in its factory located position in the unit with the
Sync source, but in its alternate position in the others.
7. For RS-232 control of the system, connect the PC to the Master switcher via
the null modem adapter. Each switcher in the configuration should be
allocated a unique machine number and the "Reply" option should be to “ON”
(see Table ). The system may also be controlled via RS-485.
8. Connect the sources to the appropriate switcher inputs.
9. Connect the power cable of each switcher to the mains supply and turn ON the
power on each switcher.
10. You now have a 12 or 18, input switcher complex, with one output.
7.4 Video Component and YC Switching
An important application for interconnected switchers is in professional
component video switching, where smooth switching is required, free from
transient effects. Four switchers of the same type are required for RGBS
systems, three for RGB or YUV systems, and two for YC systems. The
following describes how to set up the RGB video component application with
five professional video sources, each with Red, Green and Blue (RGB)
outputs (Sync on Green).
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