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Operation
2.4
Card installation and removal
Before making connections, the Model 7174A should be
installed within the Model 707A Switching Matrix, as sum-
marized below. Figure 2-1 shows the installation procedure.
WARNING
Turn off the system power before install-
ing or removing matrix cards.
NOTE
The coaxial jumpers used to expand the
matrix with two or more Model 7174A
cards can not be installed before card
insertion; an access door on top of the
mainframe allows access to the connectors
after the card is installed.
Figure 2-1
Model 7174A installation
1. Before installing the card, make sure the access door on
top of the Model 707A Switching Matrix is fully closed
and secured. The access door contains tracks for the card
slots and must be in place to properly install the card.
CAUTION
Do not touch the card surfaces or any
components to avoid contamination
that could degrade card performance.
2-2
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2. With one hand grasping the handle, and the other hold-
3. Slide the card into the mainframe until it is properly
4. To remove a card, first turn off the system power. Dis-
2.5
Card connectors, recommended cables and adapters, and
Model 707A
typical connections to test instruments are discussed in the
Switching Matrix
following paragraphs.
Model 7174A Low
Current Matrix Card
2.5.1 Card connectors
The card connectors are shown in Figure 2-2. Each pin is
equipped with a 3-lug triax connector. As shown in Figure
2-3, the center conductor is signal, the inner shield is guard,
and the outer shield is chassis ground.
The Model 7174A has 12 columns (labeled 1 through 12)
and 8 rows (labeled A through H).
ing the bottom of the card, line up the card with the
tracks in the desired slot. Make certain that the compo-
nent side of the card is facing the fan on the mainframe.
seated in the edge connectors at the back of the slot.
Once the card is properly seated, secure it to the main-
frame by finger tightening the spring-loaded screws.
WARNING
The mounting screws must be secured to
ensure proper chassis ground connec-
tions between the card and the main-
frame. Failure to properly secure this
ground connection may result in per-
sonal injury or death due to electric
shock.
connect all external and internal jumper cables (internal
cables can be reached through the access door). Loosen
the mounting screws, then pull the card out of the main-
frame by the handle. When the back edge of the card
clears the mainframe, support it by grasping the bottom
edge near the back or back edge.
Connections
CAUTION
Do not exceed 200V between any two
pins or between any pin and chassis.
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