Hi, so i am doing measurements with a pulsed laser using an oscilliscope. The signal has been ok (stable) until this afternoon when I noticed the signal started pulsating. The baseline of the signal suddenly jumps up and the baseline becomes larger, and then go down to normal.. and it keeps "pulsating" like this. Any idea what could be wrong? There might be some disturbances from other work nearby, but I am unsure what it could be.