2400 Series SourceMeter
®
User’s Manual Triggering 11-15
Trigger delay
A programmable delay is available before the Source Action. The Trigger Delay can be
manually set from 0.00000 to 999.99990 seconds. Note that this delay is separate from the
Delay Action of the SDM cycle. The Delay Action is discussed next.
Source, delay, and measure actions
The SDM cycle of the SourceMeter consists of three actions: Source, Delay, and Measure:
SOURCE Action — Any programmed output voltage or current level changes are
performed.
DELAY Action — This programmable delay is used to allow the source to settle before a
measurement is performed. It can be manually set from 0.00000 to 9999.99900 seconds,
or Auto Delay can be enabled. With Auto Delay enabled, the SourceMeter automatically
selects a nominal delay period based on the selected function and range.
NOTE In the :SYSTem:RCMode MULTiple mode, the soak time programmed with
:SOURce[1]:SOAK takes the place of the delay time only during the first SDM
cycle after the initial sweep trigger. See Section 18.
MEASURE Action — During this phase of the SDM cycle, the measurement process
takes place. If the repeat filter is enabled, as shown in Figure 11-4, the instrument samples
the specified number of reading conversions to yield a single filtered reading (measure-
ment). If using the moving filter or if the filter is disabled, only a single reading conversion
will yield a reading.
Figure 11-4
Measure action
CONV
CONV
CONV
CONV = Reading Conversion
MEASURE
Action
Filter Process
Offsest Comp. Ohms
Autorange
CALC1, CALC2
(Repeat)
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