4: Sourcing and measuring 2470 High Voltage SourceMeter Instrument
4-44 2470-901-01 Rev. A / May 2019
Source readback
You can set the instrument to record and display the voltage or current of the configured source value
or the actual source value. When you use the configured source value, the instrument records and
displays the value that was configured. When you use the actual source value, the instrument
measures the actual source value immediately before making the measurement of the device under
test.
Using source readback results in more accurate measurements, at the cost of a reduction in
measurement speed.
When source readback is on, the front-panel display shows the measured source value and the buffer
records the measured source value immediately before the device under test measurement. For
example, if you have the source set to 60 V, you will see something like +059.998 V in the SOURCE
VOLTAGE area of the home screen.
When source readback is off, the front-panel display shows the configured source value and the
buffer records the configured source value immediately before the measurement of the device under
test. For example, if the source is set to 60 V, you will see something like +060.000 V in t
he
S
OURCE VOLTAGE area of the home screen.
Setting source readback
Using the front panel:
1. Press the MENU key.
2. Under Source, select Settings.
3. Set Source Readback to On or Off.
4. Select HOME to return to the operating display.
Using a remote interface:
• SCPI commands: Refer to :SOURce[1]:<function>:READ:BACK (on page 12-84).
• TSP commands: Refer to smu.source.readback (on page 14-167).
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