It's not the probe, and measuring ground is quiet. -----Original Message----- From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu] On Behalf Of= Sean Breheny Sent: Friday, August 25, 2017 7:07 AM To: Microcontroller discussion list - Public. Subject: Re: [EE] Pic24FJ128 "Hair" on ADC pin You might also try connecting the scope probe gnd and tip together and touc= hing both to the same ground node you are using for your measurement and se= e if the fuzz is still there. -- http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/chang= e your membership options at http://mailman.mit.edu/mailman/listinfo/piclis= t --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .