Hi if you were to use our software then the answer is no! Whilst you can view your data in XY mode in our software you cannot control it to go on and off based on an input voltage.
If you were however to write your own software then this may be achievable, you may need a 4 channel oscilloscope and use the third channel as your source
3424
http://www.picotech.com/4-channel-oscilloscope.html
4424
http://www.picotech.com/picoscope4000-s ... tions.html
or use a 2 channel scope that has an external trigger source.
http://www.picotech.com/computer-oscilloscope.html
Kind regards