Grass Valley XSwitch Feb 08 2006 - Manual (Page 10)

10 XSWITCH Installation and Operation Manual
Section 1 — Introduction
Figure 4. KVM XSWITCH Module
In a typical application, the KVM module switches VGA, keyboard, and
mouse connections between two Ignite systems. Switching for optional
ScriptViewer connections is also provided.
Switching of the VGA signal groups is handled actively, while all other
signals in this group are switched passively. This is done to maintain integ-
rity and cable drive capability of the signals. Typical video signal switching
time is 5 ns. This is an insignificant time span relative to the switching time
of the VGA signal groups as a whole.
The keyboard and mouse switching is primarily passive, but does employ
some semiconductor based power coupling circuitry. Contact closure times
do not exceed 6 ms for any portion of the KVM Module.
Expansion Module
The XSWITCH can also be expanded vertically by adding up to 3 Expan-
sion Modules to any Master Module. The Expansion Module is 4 Rack
Units high and holds up to 10 switch cards. The individual Expansion
Modules communicate with each other through a multi-pin (SCSI-type)
connection.
Normal Path
Switched Path
VGA In
PS2 Out
PS2 Out
KVM XSwitch
VGA Out
PS2 In
PS2 In
PS2 In
PS2 In
VGA Out VGA In
PS2 Out
PS2 Out
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