Keithley 6430, Instruction Manual

Page: 222 / 558

10-20 Triggering
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 17.
MEASURE Action
— During this phase of the SDM cycle, the measurement process takes
place. If the repeat fi lter is enabled, as shown in Figure 10-10, the instrument samples the
speci fi ed number of reading conversions to yield a single fi ltered reading (measurement). If
using the moving fi lter or if the fi lter is disabled, only a single reading conversion will yield a
reading.
CONV
CONV
CONV
CONV = Reading Conversion
MEASURE
Action
Filter Process
Offsest Comp. Ohms
Autorange
CALC1, CALC2
(Repeat)
Figure 10-10
Measure action