Analog Coaxial

Analog coaxial CCTV systems have been a staple in the security industry for decades. They are still a common technology for video surveillance. These systems use a 75-ohm coaxial cable, typically RG59 or RG6, to directly transmit video data from a security camera to a localized Digital Video Recorder (DVR). Consequently, this direct transmission method ensures a stable and reliable connection. It makes analog coaxial CCTV a popular choice for security professionals.

One of the major improvements in modern analog installations is the use of HD-over-Coax protocols. These can deliver up to 4K Ultra HD video resolution, synchronized audio signals, and telemetry control over existing infrastructure. As a result, without needing to run new network lines, analog systems are now capable of capturing high-quality footage. This footage can rival IP systems. Because of this, analog systems are a more cost-effective option for those looking to upgrade their video surveillance capabilities.

The advancement of analog technology has also led to the development of “4-in-1” or “hybrid” hardware. This allows for easy switching between the primary communication standards used in modern analog systems. These standards include HD-TVI (High Definition Transport Video Interface), HD-CVI (High Definition Composite Video Interface), AHD (Analog High Definition), and CVBS (Composite Video Baseband Signal). Each of these standards has its advantages. Therefore, it is crucial for security professionals to understand the differences and choose the one that best suits their specific needs.

The core components of an analog coaxial CCTV system include the coaxial cabling, BNC connectors, and the DVR. RG59 Siamese Cable is the industry standard for general runs up to 800 feet (0.24 km). Additionally, for greater high-frequency shield integrity or longer distances, heavier RG6 lines are utilized. BNC connectors must be crimped or compressed onto both cable ends securely to connect cameras to the recording panel. The DVR acts as the brain of the network. It captures incoming analog electrical voltage waveforms, processes them, compresses the feeds, and stores the digital data onto internal surveillance drives.