Sirius 800 Series User Manual
Sirius 840/850: Video Crosspoint Arrangement
Crosspoint Modules 10.3
Iss 5 Rev 7
Page 162
© 2017 SAM
10.3 Sirius 840/850: Video Crosspoint Arrangement
The Sirius 840 router has five crosspoint modules situated below the input modules mounted
horizontally, that send signals to the output modules, four are used as actual crosspoint
modules, the fifth is optional and for redundancy. For Sirius 840 video crosspoint module
locations see section 8.3.1.
The Sirius 850 has the same video crosspoint module configuration as the Sirius 840 and
also has a second set of video crosspoint modules mounted above the input modules that
send signals to the expansion modules, four are used as actual crosspoint modules, the fifth
is optional and for redundancy. For Sirius 850 video crosspoint module locations see section
8.3.3.
The crosspoint modules are mapped to inputs or outputs as shown in Table 35 The redundant
crosspoint module can take the place of any of the four main crosspoints in the unlikely event
of a failure. If the redundant crosspoint has become active due to the failure of another
crosspoint, the system is no longer redundant.
If the redundant video crosspoint module has become active due to a failure of another
crosspoint module, the system is no longer redundant. When the failed crosspoint is replaced,
the user must move routes from the redundant crosspoint back to the main crosspoint, see
section 10.4.1 for details.
Note:
•
In order to route any input to any output a minimum of four crosspoint modules
must be fitted.
•
Fitting a fifth crosspoint will give the router redundancy.
•
Video signals passing through the main crosspoint modules are routed to output
channels 1 to 576.
•
Video signals passing through the expansion crosspoint modules are routed to
expansion output channels 577 to 1152.
Crosspoint
Input
Output
1
Odd
Odd
2
Even
Odd
R
Any
Any
3
Odd
Even
4
Even
Even
Table 35
Sirius 840/850 Crosspoint Arrangement
