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OPERATION
5.
6.
Connect one end of a Model 7G78-TRX-3 or -10 3-lug
triaxial cable to row A of the Model 7072.
Connect the other end of the triax cable to the Model
617 INPUT connector.
Connect the triax end of a prepared triaxibanana
cable
to row B of the Model 7072.
Connect the banana plug end of the triaxibanana
cable
to the COM terminal of the Model 617. The shorting link
between COM and chassis ground should be removed
for this application.
Place the GUARD switch in the OFF position.
To connect the voltage source to the Model 7072, con-
nect the V-SOURCE HI and LO connectors of the Model
617 to the desired row connectors on the matrix card.
Figure 2-6 shows connections
to rows C and D.
Model 196 DMM
Connections
Connect the Model 196 or other similar DMM to the matrix
card using the general configuration
shown in Figure Z-i!
The VOLTS OHMS HI and LO terminals
should be con-
nected to the desired rows using the prepared t&w/banana
cables discussed above. For 4wire
ohms measurements,
the OHMS SENSE HI and LO terminals
should be con-
nected to two addtional rows using the same type of cables.
-
NOTE
For low-level voltage measurements,
connect the
inner shield of the HI cable to VOLT OHMS Lo
to minimize
noise.
Model 230 Voltage Source Connections
Connect the Model
230 OUTPUT
and COMMON
ter-
minals to the desired rows using the prepared triaxibanana
plug cables, as shown in Figure 2-8. For remote sensing
applications, the SENSE OUTl'UT
and SENSE COMMON
connectors
can be routed through
two additional
rows
using similar cables.
Model 590 CV Analyzer
Connections
The Model 590 CV Analyzer
should be connected to rows
G and H (CV rows), or any column as shown in Figure
2-9. The BNC cables that are supplied with the Model 590
can be used; however, Model 7078~TRX-BNC triax-to-BNC
adapters must be used at the Model 7072 end.
Model
220 Current
Source Connections
The Model 220 Current Source can be connected to the
matrix card using the Model 6167 Guarded
Adapter, as
shown in Figure Z-10. This configuration
guards the out-
put signal to minimize the effects of distributed capacitance
and leakage current.
NOTE
The Model 6167 Adapter must be modified
by in-
ternally disconnecting
the inner shield connection
of
the
input
jack
from
the
GUARDED/
UNGUARDED
selection
switch.
Otherwise,
in-
strument IO will be connected to chassis ground
through
the adapter.
z-12
I
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