Logging Triggered Pulse Power Measurements to File in CW Measurement Mode

Let us start by considering a scenario where you have an RF generator configured to output 100 W, 13.56 MHz at a pulse repetition rate of 1 kHz and a duty cycle of 25%. You plan to use the BDS to sample RF pulses for 30 s maximum and do not want to start capturing datasets until after the the generator is turned on and pulses are active. 

With the BDS configured for standard tracking mode, you can open the Configuration dialog and access the Free Run tab, then set the "No. Datasets to 15,000 and the "Display Data Rate" to 2 ms with "Continuous Scan" disabled, followed by clicking the Apply button.

Click on the Trigger tab to expose the trigger settings. Add a check to the box adjacent to the "Del Power" label, then set the logic control to greater than (>), followed by 90 in the Watts entry box and selecting 13.56 from the "Frequency" drop-down control. Additionally, specify the "Datasets to collect pre-trigger event" to 10 and the "Maximum time to collect" to 30 s. Complete the setup by clicking the Apply button, then OK. 

Switch over to the time plot by using the menu options to navigate to View->Time Plot. 

For now, set the number of points viewable in the plot to 6,000 (less than a third of the number of datasets you wish to collect) by right-clicking in the plot window and selecting Graph Options... then modifying the "No. Points" to 6000 followed by Apply then OK:

You can arm the BDS for the trigger event in either of two ways: by navigating the menu through Mode->Start Trigger or by clicking on the drop-down arrow of the Run button and selecting Trigger. 

At this point you will be presented with a dialog notifying you of the trigger status and conditions:

Looking at the measurements in the Time Plot view, you will see something similar to the following, where much of the dataset information indicates most "Delivered Power" points near 100 W, yet there are a number of apparent drop-outs to zero:

This is because the pre-trigger event data are collected. 

To capture just the pulse data at the top of the pulse waveform above the defined threshold, simply set the "Datasets to collect pre-trigger event" to 0:

Triggering in the same manner as described above, your resultant data should look as follows, with all captured datasets with power above the defined 90 W threshold:

To ensure your pulse measurement datasets are saved to file, ensure that your File Options are set appropriately. Below, the option configuration will...

1. Ensure the folder path established in the "Folder" field is used when creating/updating log files. 
2. Saving is performed automatically when either a) the data capture is complete or b) the maximum number of datasets written to a single file (100k) has been reached or exceeded.