Page 4.2
PXI/PXIe 2-POLE HIGH DENSITY MATRIX (40/42-588)
pickering
SECTION 4 - PROGRAMMING GUIDE
MODULE ARCHITECTURE
The 40/42-588 is a high density 2-pole switching matrix constructed from 16x8 matrix daughter cards linked with
an analog bus. It can be fitted with 1 or 2 matrix daughter cards and connections are made by operating crosspoint
relays between X and Y lines allowing single X-Y connections, or X-X connections using a Y line as a path. Isolation
switches are used to route Y signals between sub-matrix cards via the analog bus. When not in use, Y connections
are disconnected from the analog bus to preserve bandwidth and crosstalk performance. All signal connections are
2-wire and crosspoint and isolation relays are 2-pole. Both poles are operated simultaneously when a signal path is
enabled. An example configuration for the 32x8 matrix using 2 matrix daughter cards is shown in Figure 4.1.
Isolation
Switches
Isolation
Switches
X1
X16
Matrix Daughter Card 1
Analog
Bus
Y1
Y8
X17
X32
Matrix Daughter Card 2
Front Panel Connector
Ma
tri
x
Cr
os
sp
oin
t
Ma
tri
x
Cr
os
sp
oin
t
Y1
Y8
Front Panel Connector
Figure 4.1 - 40/42-588 32x8 2-Pole High Density Matrix Module - Switching Architecture
