Analog CCTV cameras are a form of security camera that record video surveillance footage using an analog video signal (CVBS / Composite Video Baseband Signal). Using coax cable, such as RG59, analog CCTV cameras are hard linked to surveillance DVRs and monitors. We also provide 4-in-1 HD-over-Coax security cameras, which use the same coax connection as analog cameras but support 1080p video resolution (in addition to analog resolution). With no need to change cameras or cables, you may use an analog DVR right away and upgrade to an HD security DVR later.