Grass Valley XSwitch Feb 08 2006 - Manual (Page 43)

XSwitch Installation and Operations Manual 43
Appendix
B
C and D Position Example
The XSWITCH™ provided with dual Ignite systems and sold as a stand
alone unit is intended as an A to B mode of operation. This means that the
architectural intent is such that any problem with the natural on-line
system A has a one-switch operation to run from the backup system B. Fur-
thermore, the intent is for operators to control both systems from a single
control surface regardless of the on-line system. Architectural intent is for
the off-line system to be operationally active on a second control surface for
pre-production work in normal operations or used for troubleshooting a
system with problems off-line. Due to the architectural intent of the
XSWITCH it is sold with a minimum number of cards to design with your
system. Because some customers have special needs for their system, the
XSWITCH has a total of 5 switched selections an operator can choose from
for different operational functions. The individual switch cards can be pur-
chased separately for custom designs. Apart from the main frame which
contains the control panel, up to 3 expansion frames can be stacked, pro-
grammed and controlled by the main frame.
The following is an example of dual Ignite system with a GV XSWITCH
integration that utilizes the A, B, C and D positions.
Overview
A and B position functionality remains constant in this application but
added redundancy and functionality were desired. C position was created
to control the A system from the pre-production control surface. Consider-
ation for the C position was to compensate for the loss of a device on the
on-line control surface, i.e., computer monitor. In the event of such a failure,
the operator is able to depress the C button and all operations are switched
to the off-line control surface with no change in operational status. At the
time of the switch, the on-line control surface can be repaired, (monitor
swap out), without interfering with on-air operations. D position was
created to control the A system from the on-line control surface and the B
system from the off-line control surface with the exception that the B
system and off-line control surface are switched to air. Consideration for
the D position was to allow a show being pre-produced to be brought to air
without the file transfers and physical relocation of the operators to occur,