Keithley 7022, Instruction Manual

Page: 28 / 107

Matrix Configuration
2-8
Mixing card types
Different types of cards can be used together to create some
unique switching systems. For example, you could have a
Model 7022 matrix-digital I/O card installed in one slot and
a Model 7011 card installed in the adjacent slot.
Figure 2-11 shows a possible switching system using a
Model 7011 and a Model 7022. The backplane jumpers for
both cards must be installed. This allows matrix rows to be
connected to multiplexer banks. On the Model 7011, the
bank-to-bank jumpers must be removed to maintain isolation
between matrix rows. See the instruction manual for the
Model 7011 for complete multiplexer information.
Mainframe matrix expansion
A 12-card matrix is possible by using six Model 7001 main-
frames together, which provides 360 crosspoints. Also, a 60-
card matrix is possible by using six Model 7002 mainframes
together, which provides 1800 crosspoints. The limits on the
number of cards in the Model 7001/7002 switch system are
due to triggering.
In general, connecting the rows of a card in one mainframe
to the rows of a card in a second mainframe increases the col-
umn numbers of the matrix. For example, if the rows of a
4
×
12 matrix in one mainframe are connected to the rows of
a 4
×
12 matrix in a second mainframe, the resulting matrix
would be 4
×
24. Section 4 explains how to connect a test
system using two mainframes.
Figure 2-11
Mixed card type example
A
B
C
D
1 6
Columns
7022
Rows
7001/7002
Backplane
Card 1
5
×
6 Matrix
Notes : 1. Models 7011 and 7022 backplane jumpers must be installed.
2. Model 7011 bank-to-bank jumpers must be removed.
1
10
7011
Card 2
Quad 1
×
10 Mux
1
10
Bank A
Bank B
Inputs
E
Bank C
Bank D
10
10
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