Technical data

Chapter 2 31
Analyzer List Sequencer Parameter Definitions
Analysis Interval Parameters
Analyzer List Sequencer Parameter
Definitions
Analysis Interval Parameters
Each acquisition can include a number of analysis intervals. The intervals are time segments within an
acquisition, during which a specific set of measurements is made. An acquisition can include as many
analysis intervals as necessary, and the intervals can overlap in time (see Figure 1-7 on page 17).
Unlike the first 16 parameters of the sequence, which must remain unchanged during an acquisition, the
last 5 parameters (described below) can be changed as many times as necessary during the same
acquisition (however, any change does require a new analysis interval).
1: Analysis Number
The analysis intervals within an acquisition are numbered (1 through n); this parameter identifies the
analysis interval by number.
This parameter has no purpose beyond identification of a particular analysis interval. The numerical
order of the analysis intervals does not affect measurement timing (for example, the second interval can
start before the first, or after it, or at the same time).
2: Analysis Offset
This parameter sets the delay between the start of the acquisition and the start of the analysis interval.
The actual start of the acquisition is not necessarily coincident with the trigger, unless Input Trigger
Delay (the 13th parameter) is set to zero. Therefore, the trigger delay must be taken into account when
choosing a value for Analysis Offset.
NOTE Although different time units can be used in setting the analysis offset from the front
panel, the parameter value as entered in the sequence is always in ms.
The key path for setting the Analysis Offset from the front panel menus is:
[Meas Setup], Acquisition Setup, Analysis Step Setup, Analysis Offset
3: Analysis Interval
This parameter sets the length of the analysis interval (that is, the time period during which
measurements are made on the acquired data). Measuring from the start of the acquisition, the analysis
interval begins after the delay specified by the Analysis Offset parameter, and ends after the length
specified by the Analysis Interval parameter.
NOTE Although different time units can be used in setting the analysis interval from the front
panel, the parameter value as entered in the sequence is always in ms.
The key path for setting the Analysis Interval from the front panel menus is:
[Meas Setup], Acquisition Setup, Analysis Step Setup, Analysis Interval