Grass Valley Trinix NXT v.3.3.1 - Manual (Page 98)

98 Trinix NXT — Installation and Service Manual
Section 2 — Planning Guide
Planning
The following section describes the Protected path planning process.
Note The following discussion is based on a 1-based numbering scheme (Encore
Control system). If you are using a zero-based numbering system (Jupiter
AccuSwitch Control system), subtract 1 from all instances of input/output
numbers.
TRX-NXT-512x512
The recommended Protected path ranges for TRX-NXT-512x512 routers are
as follows:
For example, to protect an output in the range 1-128, choose a corre-
sponding input in the range 1-128; this will be the primary path. For the sec-
ondary (failover) path, choose an output in the range 257-384 and a
corresponding input in the range 257-384.
Alternatively, the high-range of connectors can be used for the primary
path and the low range for the secondary path, as shown in
Table 4 :
Using either of these schemes will provide the most independent possible
paths through a TRX-NXT-512x512. In other words, the primary path will
use one set of input, matrix, and output boards connected to one power
source while the secondary path will use a different set of boards connected
to a different power source.
The maximum number of Protected paths for a TRX-NXT-512x512 router is
256.
A more detailed example is shown in Table 5 . This table shows a sequential
wiring scheme for a system yet to be installed or a system where cables will
Table 3. Recommended Protected path Ranges
Primary Path Secondary Path
Output Input Output Input
1-256 1-256 257-512 257-512
Table 4. Alternative Protected Path Ranges
Primary Path Secondary Path
Output Input Output Input
257-384 257-384 1-128 1-128