I was curious if anyone else is having the same problem as me?
When Im using my 4ch pico and my HP laptop is plugged in into the charger, my signals get really distorted, and when I unplug my laptops power supply/charger, then the signal get way better?? But I need or want my laptop plugged in so It doesn't die while im diagnosing?
Some laptop power supplies do not have an earth connection and produce large amounts of interference. If you have problems when the laptop is run off it's mains adaptor, but not on battery, you can try earthing the laptop. There is often a screw on the back of the laptop that can be used for this purpose. Alternatively run a wire from the USB connector shell to mains earth.
I have 3 HP chargers and 2 HP/compaq laptops.
1 charger is genuine HP, the other 2 are cheap chinese copy's, both of the cheap ones cause interferance, noticable when working close to a radio or TV, the HP one doesn't cause any interferance. I would recommend a genuine HP charger from personal experience.