User`s guide

1 Data Processing
To extract a subset of time-domain data and save it as a new data set:
1 Import time-domain data into the System Identification Tool GUI, as
described i n “R epresenting Da ta in the GUI” o n page 1-13.
2 Drag the data set you want to subset to the Working Data area.
3 If your data contains multiple I/O channels, in the Channel menu, select
thechannelpairyouwanttoview.Theupperplotcorrespondstotheinput
signal, and the lower plot corresponds to the output signal.
Although you view only one I/O channel pair at a time, your data selection
is applied to all chann els in this data set.
4 Select the data of interest in either of th e following ways:
• Graphically — Draw a rectangle on either the input-signal or the
output-signal plot w ith the mouse to select the desired time interval.
Your selection app ea r s on both plots regard le ss of the plot on which you
draw the rectangle. The Time span and Samples fields are updated to
match the selected region.
• By specifying the Tim e span — Edit the beginning and the end times
in seconds. The Samples fi eldisupdatedtomatchtheselectedregion.
For example:
28.5 56.8
• By specifying the Samp les range — Edit the beginning and the end
indices of the sample range. The Time span field is updated to match
the selected region. For example:
342 654
Note To clear your selection, click Revert.
5 In the Data name field, enter the name of the data set containing the
selected data.
6 Click Insert. This action saves the sele ction as a new data set and adds
it to the Data Board.
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