Black Box ServSwitch Wizard VGA (USB) Manual De Usuario
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Chapter 3: Installation
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Page 21
3.2.5 Synchronizing multiple units
ServSwitch Wizard VGA (USB) units can be connected together so that they operate in a synchronized manner. Thus, two
KV3004A units can be made to switch two video heads in a similar manner to an KV3204A. Additionally, two KV3204A units
could be made to resemble an KV3404A, while two KV3404A units could be combined in order to switch up to eight video
heads simultaneously.
KV3004A units can be made to switch two video heads in a similar manner to an KV3204A. Additionally, two KV3204A units
could be made to resemble an KV3404A, while two KV3404A units could be combined in order to switch up to eight video
heads simultaneously.
Whenever an ServSwitch Wizard VGA (USB) channel is switched, it sends an RS232 command out on its serial interface (marked
OPTIONS
on the rear panel). A ServSwitch Wizard VGA (USB) unit 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 Figure 3-15.
slave units as shown in Figure 3-15.
It should be noted that the synchronization 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 ServSwitch Wizard VGA (USB) devices from operating cor-
rectly. For more details about the serial synchronization cables, see Appendix C.
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 ServSwitch Wizard VGA (USB) devices from operating cor-
rectly. For more details about the serial synchronization cables, see Appendix C.
4
3
2
1
USB2.0
SWITCHED
USB 1
USB 2
5V
2.5A
INDOOR
USE
ONLY
USER
CONSOLE
OPTIONS
4
3
2
1
USB2.0
SWITCHED
USB 1
USB 2
5V
2.5A
INDOOR
USE
ONLY
USER
CONSOLE
OPTIONS
Slave unit
Master unit
Master
monitor
monitor
Slave
monitor
monitor
Computers fitted
with multiple
video heads
with multiple
video heads
Serial
synchronization
cable
Figure 3-15. Connections for synchronizing two units