1260-45 User Manual
Module Specific Syntax 3-10
EADS North America Defense
Test and Services, Inc. © 1993
Expansion and
Configuration
Internally, the 1260-45 consists of two PCBAs with identical, dual
4 x 16 matrices. Each PCB assembly can be configured, via
internal push-on jumpers, to connect the Rows and Columns of
the two matrices. If Row 0 of the first matrix is connected to Row
0 of the second matrix, Row 1 of the first is connected to Row 1
of the second, etc., the PCB assembly becomes a 4 x 32 matrix.
The difference between the 1260-45A and the 1260-45B is the -
45B module is shipped with these jumpers installed on both PCB
assemblies at the factory. Similarly, if Column 0 of the first
matrix is connected to Column 0 of the second matrix, etc., the
PCB assembly becomes an 8 x 16 matrix. The 1260-45C has
the columns of the two PCB assemblies connected in this
fashion when shipped from the factory. (Refer to
Figure 3-2
.
The jumpers are designated J7 and J8 for the columns, and J9
and J10 for the rows).
The 1260-45 module can also be configured externally. The P/N
407058, shown in
Figure 3-3
, is included in the ship kit of each
module for this purpose. Connector 3 is the regular user
interface. The mate to this connector can be a discrete wire
connector or a ribbon cable, depending upon user preferences.
Connectors 1 and 2 are connected in parallel across the ribbon
cable. When these are inserted into J200 and J201, the result is
a dual 4 x 32 array.
Unlike the 1260-45B configuration, the interconnected matrices
are on different PCBAs inside the module. This ribbon cable can
then be extended to adjacent 1260-45 modules in the VXI
mainframe to yield dual 4 x 64, dual 4 x 96, etc. matrices. The
dual arrays can be connected together using either the internal
jumpers in a 1260-45B module, jumpers in the user cabling, or a
"configuration" connector across the ribbon cable. The mate to
the configuration connector should be a discrete wire, loopback
connector; i.e., it connects Group 0 Row 0 to Group 2 Row 0,
Group 1 Row 1 to Group 1 Row 2, etc. This loopback
"configuration" connector would allow a single 1260-45A to
become a 4 x 64 matrix.
Columns can be connected in the same fashion to yield a single
16 x 16 matrix per module.
Table 3-2
shows some common
configurations. Refer to Application Note SWI002 for more
information on the 1260-45 configurations.
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