Keithley 7012-S, Instruction Manual, Page: 23 / 93

Matrix Switching Basics
2-6
Separate switching systems
Two single-card systems can be con Þ gured by remov-
ing the backplane jumpers from one of the cards. The
two cards will be controlled by the same mainframe,
but they will be electrically isolated from each other.
Figure 2-8 shows an example using two Model 7012
matrix cards.
Narrow matrix expansion (4
×
20 matrix)
A narrow 4 row
×
20 column matrix is con Þ gured by
simply installing two “as shipped” Model 7012s in the
Model 7001 mainframe. By leaving the backplane
jumpers installed, the rows of the matrix card installed
in slot 1 (CARD 1) are automatically connected to the
rows of the matrix card installed in slot 2 (CARD 2)
through the analog backplane. The 4
×
20 matrix is
shown in Figure 2-9.
Figure 2-8
Two separate 4
×
10 matrices
1
2
3
4
1 10
Columns
7012
Rows
7001
Analog
Backplane
Card 1
1 10
7012
Card 2
4 x 10 Matrix
Columns
4 x 10 Matrix
1
2
3
4
Rows
Jumpers
Removed
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