Analog CCTV cameras are traditional security cameras that capture video and send it as an analog electrical signal over a coaxial cable to a Digital Video Recorder (DVR), which then converts the signal to a digital format for storage and playback. They are known for being a cost-effective, simple, and reliable option, particularly for basic security needs.
How they work
- Signal transmission: The camera captures a video signal and sends it through a coaxial cable to a DVR.
- Recording: The DVR receives the analog signal, converts it to a digital format, compresses it, and stores it on a hard drive.
- Connectivity: Analog systems use a wired connection via a coaxial cable, often with a BNC connector.
Pros
- Cost-effective: Analog systems are generally cheaper for both the camera and the infrastructure.
- Simple setup: They have a straightforward installation and maintenance process, making them easy to use for basic applications.
- Reliable performance: They are a reliable and proven technology.
- Low bandwidth: Analog cameras require less network bandwidth compared to their digital counterparts.
Cons
- Limited resolution: Traditional analog cameras have lower resolution and may not capture fine details as clearly as modern digital cameras, though newer high-definition (HD) analog cameras are closing this gap.
- Limited features: They typically lack advanced features like remote access and advanced video analytics found in IP systems.
- Scalability challenges: Expanding an analog system can be more difficult, as it may require rewiring, especially in large installations.