Section 7: Theory of operation Model 2601B-PULSE System SourceMeter Instrument Reference Manual
7-16 2601B-PULSE-901-01A April 2020
Figure 113: Current source operation in voltage compliance
Current source operation in power compliance
The following figure shows the results when a power limit of 600 mW is applied. As the instrument
attempts to output the programmed source value of 100 mA, the power limited voltage compliance
limit line is reached, placing the instrument in power compliance. The instrument enforces the power
compliance limit by setting the voltage compliance limit line to the new power limited voltage
compliance limit line setting (in this case, 6 V). In compliance, the instrument cannot source its
programmed current (100 mA). For a 200 Ω DUT, the instrument only outputs 30 mA (at the 6 V limit).
In this example, voltage will never exceed the programmed compliance of 10 V or the programmed
power compliance of 600 mW under any load.
Figure 114: Current source operation in power compliance
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