Doss Catalogue 2018

12 Analog CCTV - Accessories Common Image Issues BNC Accessories f f Ground signal cables/equipment only at one point – ie the recording system / monitoring end. This also means not grounding the camera bodies or brackets. f f Keep runs of cable as short as possible and away from interference sources such as high voltage lines. f f Use quality connectors and cables with correct specifications. f f Use twisted pair baluns and cabling – this will massively resist electromagnetic interference. Tips for a great picture Ground loops occur when two points, assumed to be the same voltage potential (ie. ground), are in fact different. It generally happens when the camera is not grounded at the monitoring/recording equipment, but at the point it is mounted (or even both locations). This can result in “hum bars”, picture tearing, cross-talk (or ghosting) and image rolling. Fitting a Ground Loop Isolator or rectifying incorrect grounding will fix most issues. Recommended Product: GLI02 Ground Loop Isolator Ground loops This occurs when cables pick up high frequency EMI – this can even be RF. High frequency sources can also be light switches/ dimmers, fluorescent lighting, TVs or CRT monitors, or any other device that switches power quickly. It can cause symptoms that range from rolling coloured bands, to wavy, dynamic patterns over the image. Using twisted pair or balanced cabling is usually the best way to combat such interference. Recommended Product: Doss Passive UTP Video Baluns High Frequency Interference 1 30256113 PA6113 BNC PLUG TO RCA SOCKET 2 30255720 PA5720 BNC SOCKET TO RCA SOCKET 3 30255701 PA5701 BNC SOCKET TO RCA PLUG 4 30256001 PA6001 BNC PLUG TO BNC PLUG 5 30255990 PA5990 BNC PLUG TO 'F' SOCKET 6 30521038 PG1038 CRIMP PLUG TO SUIT RG59U 7 30256117 PA6117 BNC PLUG TO RIGHT ANGLE BNC SOCKET 8 30521092 PG1092 COMPRESSION BNC PLUG TO SUIT RG59 9 30521001 PG1001 RIGHT ANGLE BNC PLUG SCREW TERMINATED 43158110 CEL5M 43158115 CEL10M 43158120 CEL15M 43158125 CEL20M 43158130 CEL30M BNC CAMERA EXTENSION LEAD WITH POWER f f Tamper-proof & Weather Resistant f f High Quality Connectors f f BNC Plug to BNC Plug f f 2.1mm DC Socket to 2.1mm DC Plug 1 7 4 2 8 5 3 9 6 43151078 VSP01 COAXIAL VIDEO SURGE PROTECTOR f f Lower insertion loss & quicker response time f f Large through-flow capacity, long life f f Easy installation and convenient maintenance 43151075 GLI02 VIDEO GROUND LOOP ISOLATOR f f Reduce picture rolling, tearing and noise f f Weather-proof design. No power required f f Solve ground loop issues without tracing inaccessible cables