Series 2280 Precision DC Power Supply Reference Manual Section 3: Functions and features
077085503 / March 2019 3-27
Source, source delay, and measure actions
The source-delay-measure (SDM) cycle consists of the following actions:
Source: Programmed output current or voltage level changes are performed. It also performs the
programmed slew rate during the level changes when the slew function is enabled.
Delay: This programmable delay is used to allow the source to settle before a measurement is
performed. It can be manually set from 0.0000 s to 99.9999 s.
Measure: During this phase of the SDM cycle, the measurement process takes place. It makes
the voltage or current measurements as determined by different measurement functions. For
details about the measurement function, refer to Select a measurement function (on page 2-74).
Counter
Programmable counters are used to repeat operations within the trigger model layers. For example, if
using a 10-point list, the trigger counter is set to 10 and measure counter to 1. Operation stays in the
Trigger Layer until the 10 source-delay-measure points of the list are completed.
If you wanted to repeat the list three times, set the arm counter to three. Three 10-point sweeps can
then be performed for a total of 30 source-delay-measure actions.
Meter complete
The instrument can be programmed to output a trigger through the rear-panel digital I/O line after the
measurement completes. An output trigger can be used to trigger another instrument to perform an
operation.
You can specify one pin to generate the meter complete output pulse. For details, see Digital I/O (on
page 3-19).
Figure 66: Meter complete output signal
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