Model 2601B-PULSE System SourceMeter Instrument Reference Manual Section 4: Sourcing and measuring
2601B-PULSE-901-01A April 2020 4-83
Front panel
To enable high-capacitance mode from the front panel:
1. Press the CONFIG key.
2. Press the SRC key and then select HIGHC-MODE.
3. Select SRC-ENABLE and then press the navigation wheel (or the ENTER key).
4. Select ENABLE and then press the navigation wheel (or the ENTER key).
5. Press the EXIT (LOCAL) key to back out of the menu structure.
Command interface
Turning on high-capacitance mode has the following effects on the SMU settings:
• smua.measure.autorangei is set to smua.AUTORANGE_FOLLOW_LIMIT and cannot
be changed.
• Current ranges below 1 μA are not accessible.
• If smua.source.limiti is less than 1 μA, it is raised to 1 μA.
• If smua.source.rangei is less than 1 μA, it is raised to 1 μA.
• If smua.source.lowrangei is less than 1 μA, it is raised to 1 μA.
• If smua.measure.lowrangei is less than 1 μA, it is raised to 1 μA.
Measuring current
The following inputs are required to test leakage using the factory leakage script, as shown in the
script example below.
â–ª SMU: Sets the 2601B-PULSE source-measure unit to use
â–ª levelv: Sets the output voltage level
â–ª limiti: Sets the current limit for discharging or charging the capacitor
â–ª sourcedelay: Solve the following equation to determine the amount of time before making a
current reading:
Where: i is the limiti setting (current limit)
â–ª measurei: Sets the current measure range
â–ª measuredelay: Defines the delay to wait after lowering the current limit before taking
the measurement
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