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6-32
Source-Measure Concepts
2400 Series SourceMeter
®
User’s Manual
Source V
When configured to source voltage (V-Source) as shown in
Figure 6-16
, the SourceMeter
functions as a low-impedance voltage source with current limit capability and can measure
current (I-Meter) or voltage (V-Meter).
Sense circuitry is used to continuously monitor the output voltage and make adjustments
to the V-Source as needed. The V-Meter senses the voltage at the Input/Output terminals
(2-wire local sense) or at the DUT (4-wire remote sense using the sense terminals) and
compares it to the programmed voltage level. If the sensed level and the programmed
value are not the same, the V-Source is adjusted accordingly. Remote sense eliminates the
effect of voltage drops in the test leads ensuring that the exact programmed voltage
appears at the DUT.
NOTE
The voltage error feedback to the V-Source is an analog function. The source
error amplifier is used to compensate for IR drop in the test leads.
Figure 6-16
Source V
Remote
SENSE HI
IN/OUT HI
Remote
I-Meter
IN/OUT LO
V-Meter
Sense Output
Adjust V-Source
(Feedback)
SENSE LO
Local
Local
x1
GUARD SENSE
GUARD
+
–
V-Source
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Summary of Contents for SourceMeter 2400
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