Model 2657A High Power System SourceMeter® Instrument Reference Manual Section 2: General operation
2657A-901-01 Rev. B/December 2012 2-21
When using the I-Source as a sink, always set the voltage compliance limit and configure overvoltage
protection (OVP) (on page 2-65) to levels that are higher than the external voltage level. Failure to do
so could result in excessive current flow into the Model 2657A and incorrect measurements.
The sink operating limits are shown in Continuous power operating boundaries (on page 4-4).
Sink mode
When operating as a sink, limit inaccuracies are introduced. Enabling sink mode reduces the source
limit inaccuracy seen when operating in quadrants II and IV (quadrants I and III will show this source
limit inaccuracy).
Setting the sink mode using the front panel
To enable or disable the sink mode from the front panel:
1. Press the CONFIG key and then the SRC key.
2. Select SINK-MODE.
3. Select ENABLE or DISABLE.
4. Push the ENTER key. Sink mode is enabled or disabled, as applicable.
5. Press the EXIT (LOCAL) key to return to the main display.
Setting the sink mode from the remote interface
To enable or disable sink mode from the remote interface:
The programming example below illustrates how to enable sink mode (to disable, set the attribute to
smua.DISABLE):
smua.source.sink = smua.ENABLE
Fundamental circuit configurations
The fundamental source-measure configurations for the Model 2657A are shown in the figure below.
When sourcing voltage, you can measure current or voltage (see A: Source V). When sourcing
current, you can measure voltage or current (see B: Source I). See Basic circuit configurations
(on
page 4-18) for detailed information.
CAUTION
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