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3.4.2 Two-card system
Both Figure 3-13 and Figure 3-14 show a system using two
multiplexer cards installed in one Model 7001 mainframe to
configure a single 1 × 80 multiplexer system. Each card is
configured as a single 1 × 40 multiplexer. All bank-to-bank
jumpers (both cards) are installed to connect Banks A, B, C,
and D together. By leaving the backplane jumpers of both
cards installed, the banks of Card 1 are connected to the
banks of Card 2 through the analog backplane of the Model
7001 mainframe resulting in the 1 × 80 configuration.
Figure 3-13 shows how external connections can be made for
the multi-pin connector cards. In this example, a single Mod-
el 7011-MTC-2 round cable assembly is cut in half to pro-
vide two cables, each of which is unterminated at one end.
The unterminated ends of the two cables are hard-wired to
the instrument and DUT as shown in the drawing. The other
ends of these cables mate directly to the Model 7015-C mul-
tiplexer card assemblies.
Figure 3-14 shows how external connections can be made for
the screw terminal connector card. Single conductor connec-
tions are made directly from the screw terminals of the con-
nector card to the instrument and DUT.
3.4.3 Multiple-card systems
The same general system configuration shown in Figure 3-13
and Figure 3-14 can be expanded further by substituting a
Model 7002 mainframe for the Model 7001. Since a single
Model 7002 can hold 10 cards, a 1 × 400 multiplexer can be
configured using 10 Model 7015 cards in a single main-
frame.
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Card Connections & Installation
3.4.4 Two-mainframe system
Both Figure 3-15 and Figure 3-16 show a system using three
multiplexer cards installed in two Model 7001 mainframes to
configure a single 1 × 120 multiplexer system. Each card is
configured as a single 1 × 40 multiplexer. Bank-to-bank
jumpers of all three cards must be installed to connect Banks
A, B, C, and D together.
By leaving the backplane jumpers of the cards in mainframe
#1 installed, the banks of Card 1 are connected to the banks
of Card 2 through the analog backplane of the Model 7001
mainframe resulting in a 1 × 80 configuration. External bank
connections from the instrument to the card in the second
mainframe connect the banks of all three cards together to
form the 1 × 120 multiplexer system. This system is similar
to the Two-card System (see previous paragraph) except that
a third multiplexer card (installed in a second mainframe) is
added.
Figure 3-15 shows the connection scheme for the multi-pin
connector cards. External circuit connections to the Model
7001 #1 mainframe are identical to the ones used for the
Two-card System. The third multiplexer card (installed in
Model 7001 #2 mainframe) shows how a custom-built cable
can be used to make connections to external circuitry. A suit-
able round cable can be constructed using a 96-pin female
DIN connector (Model 7011-KIT-R) with two lengths of Hi-
tachi cable P/N N2807-P/D-50TAB. This cable contains 50
conductors; two lengths provide 100 conductors. This cable
will mate to the Model 7015-C multiplexer card assembly.
The unterminated end of the cable is connected directly to
the instrument and DUT. Notice that the bank connections
for the third multiplexer card are made at the instruments.
Figure 3-16 shows connections for the screw terminal con-
nector card. Single conductor connections are made directly
from the screw terminals of the connector card to the instru-
ment and DUT.
3-13
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