Section 4: Theory of operation
2606B System SourceMeter® Instrument Reference Manual
4-12
2606B-901-01 Rev. B / May 2018
Basic circuit configurations
Source V
When configured to source voltage (V-source) as shown in the figure below, the 2606B 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
(on page 2-50)).
Figure 90: Source V configuration