TempScan / MultiScan User's Manual Chapter 12: System Configuration 181
• Auto Re-arm: This parameter is the feature which determines whether or not, after the initial
acquisition, the acquisition will be re-enabled automatically. If the Auto Re-arm feature is in use,
the TempScan/1100 or MultiScan/1200 unit will immediately begin looking for another Trigger
event once a Stop event and Post-Stop count are detected to indicate that the current acquisition
has terminated. When the next Trigger is detected, a new acquisition with the same channel
configuration will be enabled automatically. Otherwise, if this feature is not in use, and the initial
acquisition has terminated, a Set Trigger Configuration (
T) command must be issued after a Stop
event, before the unit can begin looking for a Trigger.
However, using Auto Re-arm does not allow you to change the Trigger configuration between
Triggers. Consequently, the initial configuration will be used until the Auto Re-arm is disabled.
To disable the Auto Re-arm flag, a Set Trigger Configuration (
T) command must be issued with
the
re-arm parameter set to zero. Data will still be available after the T command is issued.
• Trigger Synchronization: This parameter is a flag which determines whether or not the Trigger
(trigger start event) should be synchronized with the Pre-Trigger scan interval, provided that both
the Pre-Trigger count and normal scan interval are configured via the Set Counts (Y) and Set Scan
Interval (I) commands, respectively. If this flag is set, then the Trigger scans will begin on the
next "tick" of the Pre-Trigger scan interval, regardless of the exact point in time when the actual
Trigger occurred. So, if the actual Trigger occurs between "ticks" of the Pre-Trigger scan
interval, then the acquisition will not begin until the next "tick" of the Pre-Trigger scan interval.
Otherwise, the acquisition of Post-Trigger scans will begin independently at the exact point when
the Trigger (trigger start event) is detected.
Trigger Start & Stop Event Sources
As already mentioned, the TempScan/1100 or MultiScan/1200 can be configured so that the Trigger
and Stop are assigned different trigger sources. However, since the Set Trigger Configuration (
T
)
command governs the configuration of an acquisition, all other acquisition-dependent commands
should be sent before the trigger sources are assigned via the Set Trigger Configuration (
T) command.
The required acquisition-dependent commands will depend on the selected trigger sources. For
instance, if the unit is configured for Trigger On (
@) command, it will not be necessary to send the
unrelated Set Trigger Level (
L) command.
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