Section 7: Theory of operation Model 2601B-PULSE System SourceMeter Instrument Reference Manual
7-10 2601B-PULSE-901-01A April 2020
Figure 105: Voltage source operation in current compliance
Voltage source operation in power compliance
The figure below shows what happens if a power limit of 60 mW is applied. As the instrument
attempts to output the programmed source value of 10 V, the power compliance limit line is reached,
placing the 2601B-PULSE in power compliance. The 2601B-PULSE enforces the power compliance
limit by setting the current compliance limit line to the new power limited current compliance limit line
setting, which in this case is 8.66 mA. In compliance, the 2601B-PULSE cannot source its
programmed voltage (10 V). For the 800 Ω DUT, the 2601B-PULSE only outputs 6.928 V (at the
60 mW limit). In this example, current never exceeds the programmed compliance of 10 mA, or the
programmed power compliance of 60 mW, under any load.
Figure 106: Voltage source operation in power compliance
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