I'm using http://www.amazon.com/gp/product/B00K919SHG?psc=1&redirect=true&ref_=oh_aui_detailpage_o00_s00 for a power adapter and have not had this issue at all with my huisun ptz. Have you all tried unplugging all your cams but the ptz? Are you running max bit rate at 4096? i-frame @ 20? Try...