Section 7: Theory of operation Model 2601B-PULSE System SourceMeter Instrument Reference Manual
7-20 2601B-PULSE-901-01A April 2020
Source V
When configured to source voltage (V-source) as shown in the figure below, the 2601B-PULSE
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 monitor the output voltage continuously and make adjustments to the
V-source as needed. The V-meter senses the voltage at the HI / LO terminals (2-wire local sense) or
at the device-under-test (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. With 4-wire sensing enabled,
both remote sense leads must be connected or incorrect operation will occur. Use contact check to
verify that the sense leads are connected (see Contact check measurements (on page 4-12)).
Figure 118: Source V configuration
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