Only time will tell if AHD will become more widely used then CCTV systems. CCTV technology is currently very stable and installing systems is very, very affordable. Interestingly, some people in the CCTV industry thought that analogue CCTV systems would have fallen out of favour years ago.
In 2007 megapixel resolution cameras were catching attention. Despite the attention, a lot of people found that IP cameras were difficult to install and maintain; the pricing never came down either, so people lost interest, as the technology never justified the price-tag.
AHD CCTV is an analogue, extremely high-definition, closed-circuit TV surveillance system that incorporates a coax cable in order to broadcast a sharp HD video from certain security cameras to DVRs. AHD works symbiotically with 720p and 1080p HD video resolutions. Importantly, you can use varying types of AHD CCTV cameras, dependent on what you need.
What type of cable do AHD cameras use?
AHD CCTV systems are joined to DVRs as they use the same coaxial cable as older, more traditional CCTV systems – these are typically RG59 or RG6 coax cables. One of the main advantages of AHD systems over simpler HD-SDI, is that RG59 coax cables can be installed to run along longer lengths without degrading the quality of the image seen on the camera. From research, installers can use a RG69 coax cable up to an impressive distance of 800 feet for all AHD cameras. Alternatively, AHD cameras can also use UTP cable, which include video baluns; this means cable can be ran up to 320 metres (960 feet) with a CAT5 cable.
HD-SDI entered surveillance industry around 2010, despite being used to make films and HDTV for eons. Although people really like using HD-SDI cameras, the general acceptance of them, as a concept, has been severely limited. Many say that HD-SDI cameras are fundamentally flawed because you cannot run a coax cable long distances; plus, there is no assistance for video baluns. Despite all these drawbacks, the picture quality of HD-SDI is not matched by anything else on the market.