Viewing and Analyzing a Logged Signal

After you log a signal, you can switch to the Playback work area to play back and analyze the logged signal. The Playback work area is similar to the Monitor/Record work area except that the Data View tab appears with a time bar and various buttons you can use to navigate a logged signal, and you can use logged signals as step inputs. Complete the following steps to view a logged signal in the Playback work area and run the logged signal through a Processing or Analysis step.

1. In the Monitor/Record work area, log a signal.
2. Select Playback or the name of the log you want to play back from the pull-down menu that appears above the Project View to switch to the Playback work area. You also can select View»Work Areas»Playback to switch to the Playback work area.

Note  If you select a specific log from the pull-down menu above the Project View, LabVIEW SignalExpress makes that log the active log when you switch to the Playback work area.

2. Drag a logged signal from the Logged Data window to the Data View tab.
3. Click the Run button. LabVIEW SignalExpress plays back the logged signal at the speed at which you recorded the signal.
4. (Optional) Use the buttons and the pull-down menu on the time bar to adjust how LabVIEW SignalExpress plays back the logged signal. You can change the playback speed, play back the signal repeatedly, play back the signal from a specific point in time, or run one iteration (block) of the logged signal at a time. You also can move the pointer on the time bar to navigate through the logged signal manually.
5. Add a step that requires an input signal, such as the Filter step, to the Project View. LabVIEW SignalExpress automatically selects the active log as the step input.
6. Drag the output of the step to the Data View tab and click the Run button. LabVIEW SignalExpress runs the logged signal through the step block by block and displays the results on the Data View tab.

You can use the Playback Options tab to configure advanced playback options. For example, you can use the Playback Options tab to select subsets of logged signals to play back and analyze, change the block size of logged signals, and to configure overlap of blocks of signal data.