Keithley 7035, Инструкция по эксплуатации

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Multiplexer Configuration
2-2
Figure 2-2
Single-ended switching example
Typical multiplexer switching schemes
The following paragraphs describe some basic switching
schemes that are possible with a two-pole switching multi-
plexer. These switching schemes include some various
shielding configurations to help minimize noise pick-up in
sensitive measurement applications. These shields are shown
connected 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 mainframe.
Single-ended switching
In the single-ended switching configuration, the source or
measure instrument is connected to the DUT through a
single pathway as shown in Figure 2-2. The instrument is
connected to the output of one of the banks, and the DUT is
shown connected to one of the inputs for that bank.
Differential switching
The differential or floating switching configuration is shown
in Figure 2-3. The advantage of using this configuration is
that the terminals of the source or measure instrument are not
confined to the same pathway. Each terminal of the instru-
ment can be switched to any available input in the test
system.
Figure 2-3
Differential switching example
Source or
Measure
Bank A-I
Input 1-4
7035
H
L
HI
LO
DUT
Optional
Shield
Out In
HI
LO
Source or
Measure
Bank A
Input 1-4
7035
H
L
H
L
DUT
Out
Out
In
In
Bank B
Input 5-8