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Slave AdderView CATx
Master AdderView CATx
Master monitorSlave monitor
Computers fitted
with dual video
heads
Serial
synchronisation
cable
Multiple video head connections
Two or more AdderView CATx units can be
connected together so that they operate in a
synchronised manner. Synchronised operation
is useful for applications that require multiple
video signals to be switched together. This type of
operation is usually required where each computer is
fitted with multiple video cards or video cards with
multiple video heads. Whenever a AdderView CATx
channel is switched, it sends an RS232 command out
on its serial interface (marked COM1/UPGRADE on the rear panel).
An AdderView CATx will switch its channel if it receives the
same command on its serial interface. Consequently, by linking
the serial interfaces, a master unit may be made to automatically
switch one or more slave units as shown in the diagram.
It should be noted that the synchronisation cable deliberately does not have
the transmit pin of the Slave End connector linked to the receive pin of
the Master End connector. To do so would cause the Slave unit to be able
to switch the Master unit. This would setup an endless cyclical switching
sequence that would prevent the AdderView CATx devices from operating
correctly. For more details about the serial synchronisation cables, see
Appendix 7.
The local user ports can also
be used to view multiple
video head installations.
Notes
It is recommended that the
second CAM in each pair is a
USB-type and that it is plugged
to a vacant USB port on the host
computer to derive its power.
Pairs of CAMs can be strapped
back-to-back with cable ties to
create a tidy installation.