2
Matrix Configuration
2-1
Introduction
This section covers the basics for matrix switching and is
arranged as follows:
•
Basic matrix configuration (5
×
6) —
Covers the basic
5
×
6 matrix configuration. The significance of the
backplane jumpers is also covered here.
•
Typical matrix switching schemes —
Explains some
of the basic ways a matrix can be used to source or mea-
sure. Covers single-ended switching, differential (float-
ing) switching, and sensing.
•
Matrix expansion —
Discusses the various matrix
configurations possible using multiple cards.
Basic matrix configuration (5
×
6)
A simplified schematic of the Model 7022 matrix is shown
in Figure 2-1. The card is configured as a 5
×
6 matrix. Each
of the 30 crosspoints is made up of a two-pole switch. By
closing the appropriate crosspoint switch, any matrix row
can be connected to any column in the matrix.
Figure 2-1
Model 7022 simplified schematic
Backplane jumpers
In Figure 2-1, the four pairs of backplane jumpers shown are
located on the relay card. With the jumpers installed, the
matrix is connected to the analog backplane of the Model
7001/7002 to allow matrix expansion with a second card
installed in the mainframe. With the jumpers removed (cut),
the matrix is isolated from an adjacent card installed in the
mainframe. Note that row E does not connect to the analog
backplane.
Rows
Columns
To 7001/7002
Analog
Backplane
Backplane
Jumpers
(4 pairs)
1
A
B
C
D
2
3
4
5
6
E
HI
LO
Crosspoint (1 of 30)
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Summary of Contents for 7022
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