Hi Gary,
You can stop the spectrogram by single stepping the measurements, by pressing the “Single” button in the toolbar. This will stop both the sweep and spectrogram. There is no way currently to stop just the spectrogram.
Also, keep an eye out in the next 2 weeks for version 3.1.8 where we will have revisited the spectrogram display, giving you the ability to scroll through past history (up to several thousand traces) and view the amplitude/frequency/time of any event in the spectrogram.
Let me know if you have additional questions.
Regards,
Andrew
