.USR File  right click and save as... this is a text file. Qi.USR

To load this ,without installing as a new menu item, use
"File".."Load Settings" from SL's main window .


I used the Generator and a black box filter to test the concept of measuring a filter.



The filter shown is designed to 150 Hz bandwidth centered on 1000 Hz. The calculated Q is 6.7777777

The test measured it as 147 Hz bandwidth and Q as 6.7999.

There is a button (write LTA) that will export the LTA trace, although I did not find it very useful.  

The Plotter was used to observe the samples and displays the first  7  iterations. I knew the frequencies and expected results, so the settings are to minimize the time needed to get a complete a sweep of the passband. These can be changed if an unknown filter is being tested.

It takes about 4 passes to get reasonable results, so this is not a very fast method. Compared to post processing an exported file, it is not unreasonable.

I also tried using the noise generator rather than sweeping a generator. This  worked, but needs more sampling to average out the random noise.