shukri.re@gmail.com

hi, I m ciku from malaysia n i m running cctv project with my friends. Recently i've mounted 7 fixed cameras + 1 ptz cameras running on single dvr (8channels) and system works fine till last nite. now the ptz camera cannot be cntrol by dvr( failed to be pan/move/zoom) but the ptz picture is good. later on i tested the ptz with its stand alone cntrol unit(with 485), the ptz can be control, fully without any problems. The distance of cable from PTZ to the dvr is 10 meters. but still it, works fine for past three months. My question is where should i start troubleshooting? and... Do PTZ rs485 signal traveling issues(cable size, distance of cable, signal form and voltage) is highly significant in performance of ptz controlling. please anyone, Mr. Mrs. Ms. Sir Madam I need helpppppp............

hello......hi to all.