Grass Valley Trinix NXT v.3.3.1 - Manual (Page 371)

Trinix NXT — Installation and Service Manual 371
Jupiter Configuration
Note With Encore systems, there is no “follow” level locking function; in other
words, it remains possible to inadvertently perform a breakaway switch.
Jupiter Configuration
As described earlier, the control system (for example, Encore or Jupiter)
must be operated so that the secondary path is always ready to provide a
copy of the protected signal.
To simplify operation, a Jupiter control system should be configured so that
the secondary path will be switched automatically; that is, “follow” the
primary path switch. This can be arranged using “logical level mapping,”
where the primary paths are assigned to one logical level and the secondary
paths to another logical level, but both logical levels are assigned to the
same physical level. Special Switcher Input and Switcher Output tables are
then created for each of these levels.
For example, the station engineer may want to set aside a 32 x 32 block in a
TRX-NXT-512x512 router for secondary path operation. This block would
consist of a dedicated input board with inputs 257-288, and a dedicated
HO-33120 output board with outputs 257-288.
Routing Switcher Description Table
In the Jupiter Switcher Description table, a 480 x 480 block would be
assigned to the “Primary” logical level, and assigned to physical level “1.”
See
Figure 263 .
Figure 263. The Jupiter Switcher Description Table
The remaining 32 x 32 block would be defined as the “Secondary” logical
level and also assigned to physical level “1.”
The “Follow” field for the Secondary level would list the name of the
primary logical level. This will prohibit breakaway switching.
Switcher Description
1
Switcher Board
2
3
CM1
CM1
PRIMARY
SECONDAR
MAINROUT
MAINROUT
Driver
Binary
Binary
Option Audio Follow Level
PRIMARY
VI RV MC #IN #OUT PLvl Level
DM 400
Off Time
512 512 1
512 512 1
3LI 3LO
None