Keithley 4200-SCS, Руководство пользователя

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1-32 Return to Section Topics 4200-900-01 Rev. K / February 2017
Section 1: Getting Started Model 4200-SCS User’s Manual
The waveforms for a calculation can be input channels (2) and waveforms that are stored in
memory as reference channels (4). For more information about ZTEC, refer to the 4200-SCS
Complete Reference, ZTEC User’s Manual, Chapter 2.
Ground unit (GNDU)
Basic characteristics
The ground unit (see Figure 1-26 ) provides convenient access to circuit COMMON, which is the
measurement ground signal shared by all installed 4200-SCS instrumentation. In addition, the
GNDU SENSE terminal provides access to the SMU SENSE LO signals.
Figure 1-26
Ground unit
Basic ground unit characteristics are summarized in Table 1-4 .
Basic circuit configurations
Ground unit connections
Figure 1-27 shows how the various GNDU signals are related to the SMU signals. Note that the
GNDU FORCE signal is circuit COMMON. The GNDU SENSE terminal is connected to each SMU
SENSE LO signal through a unique auto-sense resistor.
When the GNDU SENSE signal is connected to a DUT, all measurements will be made relative to
this DUT connection.
Table 1-4
Basic ground unit characteristics
Characteristic Description
Maximum current (FORCE triax connector) 2.6 A
Maximum current (COMMON binding post connector) 9 A
Maximum FORCE path/cable resistance 1
Ω
Maximum SENSE path/cable resistance 10
Ω
GNDU
S
E
N
S
E
F
O
R
C
E
C
O
M
M
O
N