Measurement-computing TempScan/1100 Manual de usuario Pagina 73

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TempScan / MultiScan User's Manual 879596 System Configuration 4-15
If the Post-Stop stop parameter of the Set Counts (Y) command is set to a non-zero value, the
TempScan/1100 or MultiScan/1200 will begin sampling Post-Stop data upon the occurrence of the Stop
event, and will acquire the specified number of Post-Stop scans.
When the specified number of Post-Stop scans have been collected, the unit will terminate the current
acquisition and return to a non-acquiring state. If, however, the Post-Stop
stop parameter of the Set
Counts (
Y) command is zero, the unit will return immediately to a non-acquiring state upon the occurrence
of the Stop event (unless the Auto Re-arm feature is used).
The Post-Stop state may be detected by querying the Stop Event Bit (Bit 1) and the Acquisition Complete
Bit (Bit 0) of the Event Status Register (
ESR). If and only if the Stopped Bit (Bit 1) of the ESR is set, and
the Acquisition Complete Bit (Bit 0) of the
ESR is not set, then the TempScan/1100 or MultiScan/1200 unit
is in the Post-Stop state. The unit will exit the Post-Stop state when the specified number of Post-Stop
scans have been acquired. When this occurs, the Acquisition Complete Bit (Bit 0) of the
ESR will be set
and the unit will return to a non-acquiring state (unless the Auto Re-arm feature is used).
Continuous, Gap-Free Acquisition with Two Timebases
The TempScan/1100 or MultiScan/1200 unit can be configured to have different timebases for its Pre-
Trigger (normal scan interval) and Post-Trigger (acquisition scan interval) states. When the user-specified
Trigger condition is satisfied, the unit switches from the Pre-Trigger to the Post-Trigger state, changing its
timebase if configured to do so. This feature, along with Auto Re-arm, can be used to collect continuous,
gap-free data at two different timebases.
To ensure that the collected data is gap-free, the Pre-Trigger
pre parameter of the Set Counts (Y)
command must be set to
-1. If a value of 0 or higher is used as the Pre-Trigger pre value, then that value
is the maximum number of Pre-Trigger scans that can be placed in the Acquisition Buffer after the Trigger
condition is satisfied.
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