GRASS VALLEY APEX -, Installation And Service Manual

Page: 52 / 132

52 APEX — Installation and Service Manual
Section 2 — Planning Guide
Dual References – Redundant Operation
In this arrangement ( Figure 18 ), the same video reference is brought to the
Primary and Secondary Matrix boards, and the same AES reference is
brought to both boards. If the Primary board fails the system will switch
automatically to the Secondary board.
The system will detect that the same reference signals are connected to both
boards and automatically combine Sync Bus 0 with Sync Bus 2 and Sync
Bus 1 with Sync bus 3. When configuring the output boards, only Bus 0 and
Bus 1 are valid selections.
Figure 18. Dual References – Redundant Operation
House Video Reference (used for AES sync)
AES REF A
VID REF A
AES REF B
VID REF B
House AES Reference
Input and output
board(s) on
AES Ref
Input and output
board(s) on
Video Ref
These connections require
Matrix board B to be present
0 1
Binary ID used for assigning
reference to input and output board
with XPT board DIP switch
To next Apex chassis (or terminate)
To next Apex chassis