AMETEK Lx Series II Programming Manual - Manual (Page 139)

Programming Manual Lx \ Ls Series II
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4. Determine the number of times the list is repeated before it completes. For example, to repeat
a list 10 times use:
LIST:COUNt 10
Entering INFinity makes the list repeat indefinitely. At *RST, the count is set to 1.
5. Determines how the list sequencing responds to triggers. For a closely controlled sequence of
output levels, you can use a dwell-paced list. To cause the list to be paced by dwell time use:
LIST:STEP AUTO
As each dwell time elapses, the next point is immediately output. This is the *RST setting.
If you need the output to closely follow asynchronous events, then a trigger-paced list is more
appropriate. In a trigger-paced list, the list advances one point for each trigger received. To
enable trigger-paced lists use:
LIST:STEP ONCE
The dwell time associated with each point determines the minimum time that the output
remains at that point. If a trigger is received before the previous dwell time completes, the
trigger is ignored. Therefore, to ensure that no triggers are lost, program the dwell time to
zero.
6. Use the transient trigger system to trigger the list. This is described in detail under "Triggering
Output Changes" (Section 6.7).
6.7 Triggering Output Changes
The AC source has two independent trigger systems. One is used for generating output changes,
and the other is used for triggering measurements. This section describes the output trigger
system. The measurement trigger system is described under "Triggering Measurements".
The basic components of both systems are the same, but the transient trigger system has
additional delay and phase synchronization features that the measurement trigger system does
not have.
The following transient trigger sources can be selected:
IMMediate generates a trigger when the trigger system is initiated.
BUS selects IEEE-488 bus triggers.
EXTernal selects the external Trigger In1 SMA connector.
6.7.1 SCPI Triggering Nomenclature
In SCPI terms, trigger systems are called sequences. When more than one trigger system exists,
they are differentiated by naming them SEQuence1, SEQuence2, ... etc. In the AC source,
SEQuence1 is the transient trigger system, SEQuence2 is the phase synchronization trigger
system, and SEQuence3 is the measurement trigger system.
The AC source uses aliases with more descriptive names for these sequences. These aliases can
be used instead of the sequence forms.
Sequence Form Alias
SEQuence1 TRANsient
SEQuence2 SYNChronize
SEQuence3 ACQuire