Model 2601B-PULSE System SourceMeter Instrument Reference Manual Section 7: Theory of operation
2601B-PULSE-901-01A April 2020 7-11
Voltage source sweep operation in current and power compliance
The following figure shows a voltage sweep on a resistive load of 800 Ω. For this example, the
2601B-PULSE is programmed to sweep voltage to 10 V, limit current (6 mA) and limit power (50 mW).
When sweeping, the actual source output varies according to the programmed source value until the
current limit is reached. As the figure shows, the output sources the programmed value until placed in
current compliance at the 6 mA limit. The sweep then continues. Programmed current source values
increase along the green sweep points line, but the output remains at the value it was at when the
instrument went into voltage compliance. This continues until the programmed source value sweeps
to a high enough level that the power limit line is reached (50 mW). At this point, the current and
voltage start to decrease, lowering the current and voltage values along the DUT load line. When the
last point is swept (10 V), the actual output is 10 V (at 5 mA).
Figure 107: Programmed voltage source sweep operation in current and power compliance
V-source sink operating boundaries
The quadrant within which the 2601B-PULSE operates depends on the device-under-test (DUT) that
is connected to the 2601B-PULSE output. The following example illustrates this operation using the
2601B-PULSE configured as a voltage source to discharge a 12 V power source (a battery).
Figure 108: Sourcing voltage while sinking current
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