Matrix Configuration
2-2
The three-pole analog backplane of the mainframe is shown
in Figure 2-2. It is through this analog backplane where the
rows of a Model 7022 card installed in one slot can be con-
nected to the rows (or banks) of a compatible card installed
in the adjacent slot of the mainframe.
Figure 2-3 shows how each row of the Model 7022 is con-
nected to the backplane. Since the Model 7022 is a two-pole
card, it does not provide a connection to the Guard terminal
of the backplane. The Model 7022 is shipped from the fac-
tory with the backplane row jumpers installed.
Figure 2-3
Matrix row connections to backplane
Removing (cutting) the backplane jumpers isolates the card
from the backplane, and subsequently, any card installed in
the adjacent slot. For information on removing the jumpers,
refer to Section 4.
NOTE
The Model 7001/7002 does not provide an
analog backplane for the non-701X/702X/
703X series cards. As a result, any of these
cards installed in one slot in the main-
frame is electrically isolated from any card
installed in the adjacent slot. The only way
to connect a Model 7022 to one of these
cards is to wire them together.
Typical matrix switching schemes
The following paragraphs describe some basic switching
schemes that are possible with a two-pole switching matrix.
These switching schemes include some various shielding
configurations to help minimize noise pickup in sensitive
measurement applications. These shields are shown con-
nected to chassis ground. For some test configurations,
shielding may prove to be more effective connected to circuit
common. Chassis ground is accessible at the rear panel of the
Model 7001/7002.
7001/7002
Analog
Backplane
H
L
G
H
L
7022
Matrix Row
(1 of 4)
Backplane
Jumpers
H = High
L = Low
Analog
Backplane
Card 1
Card 2
Model 7001/7002
H
L
G
Row A
H
L
G
H
L
G
Row B
H
L
G
H
L
G
H
L
G
H
L
G
H
L
G
Row = Matrix (7022)
Note:
Row E does not
connect to the
analog backplane.
H = High
L = Low
G = Guard
Row C
Row D
Figure 2-2
Model 7001/7002 analog backplane
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Summary of Contents for 7022
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