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OPERATION
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Note : Rows C - F jumpered through backplane.
Rows A. 8, G. and H require installation of coaxial jumpers (shown heavily shaded).
Figure 2-14. Connecting
Three Cards for 6 x 36 Matrix
Rows
C through
F are automatically
connected together
through the backplane of the mainframe.
The mainframe
can be configured
for two sets of three cards each by
removing jumpers from the backplane of the mainframe;
-
see Section 3 of the Model
707 Instruction
Manual
for
details on removing
the jumpers. With the row jumpers
removed, rows C through
F of Model 7072 cards in slots
1 through 3 are connected, and rows C through F of Model
7072 cards in slots 4 through
6 are connected together.
Because of more critical signal paths, rows A, B, G, and
H are not jumpered
through the backplane. Instead, you
must install
the supplied
coaxial jumpers between ap-
propriate connectors on Model 7072 cards (for critical signal
paths, rows can be isolated from other cards by not install-
ing these cables). Each card has two SMB coaxial connec-
tors for each row, allowing
daisy chaining
of card rows.
These connectors can be reached by lifting the access door
on the top of the mainframe;
it is not necessary to remove
cards to install the jumpers. Figure 2-15 shows an edge-on
view of the jumper connectors with row numbers mark-
ed for convenience.
Figure 2-16 demonstrates
how three
cards can be daisy chained
together using the coaxial
jumpers.
WARNING
The SMB coaxial shields are at guard potential.
To avoid a posslble shock hazard, always
disconnect all cables from the row and column
jacks before removing or installing jumpers.
Figure 2-16. Jumper Connector
Locations
2-21
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