Thick coaxial cables are difficult to install in all sites – especially if you have tight spaces or sharp corners.As video transmission is analog, the cybersecurity threat is far less than that of IP cameras and network video recorders, which use an internet connection to transmit video.Similarly, DVR systems are more versatile if you want to mix and match different CCTV camera types and brands.It is possible to make affordable improvements to your existing system by changing features such as cables, connectors, encoders, and even the software you use to monitor video data. DVR systems are useful if you have an existing security system that you don’t plan to fully upgrade in the near future.Investing in a DVR recorder for cameras is a more cost-effective option. These are not the latest security camera system available, so they tend to be cheaper to buy – an important consideration if you are on a budget. A DVR system uses analog security cameras.Using these cables can increase the number of audio streams transmitted to your digital video recorder, without being limited by the number of audio ports. There is a type of cable known as audio-over-coaxial cable, which simplifies installation and removes the need for multiple ports, cables and additional connectors. These can be added to your system, but the number of audio streams you can record is limited to the number of audio input ports available on your DVR camera recorder. It is not possible to transmit audio over DVR security systems unless the security camera recorder has audio input ports, and the camera system is able to record audio. Once encoded, it can be stored or viewed.Ī nearby power source is also needed to power the camera system the power can either be carried by a separate cable, or by a siamese cable that can simultaneously supply power and transmit video. This signal is not digital, and only becomes so when it is encoded in the digital video recorder. The section on NVR systems below describes this equipment in more detail.Īs the diagram shows, DVR systems rely on a coaxial cable to transmit the raw data, or unprocessed video signal. This is an important factor to bear in mind when considering the size and layout of your DVR system.īoth types of coaxial cable can be bulky, so consider where you plan to set up your analog security cameras if it involves running cables around corners or through very tight spaces, IP cameras and more flexible ethernet cables might be a better choice. This type of coaxial cable supplies power to an analog camera, whilst also carrying the signal to the DVR camera recorder.Ĭoaxial cables can reach a maximum distance of 90m or 300ft in length any longer than this and the signal begins to degrade, compromising the video quality. It is possible to run power cables to analog cameras from a nearby power outlet, but there is a second cable type that offers a more streamlined option.Ī siamese cable combines a coaxial cable and a power cable into one casing, reducing the hassle and mess of numerous cables. However, these DVR security cameras also need a power supply to work. The first are standard coaxial cables, which only transmit analog signal as a frequency. There are two kinds of coaxial cable that you can use to connect an analog camera with DVR recorder technology. It is converted by a piece of equipment known as an analog-to-digital converter (ADC), also known as an AD encoder. Along with an analog camera, DVR recorder and coaxial cable, some more advanced hardware is needed to encode the signal. CCTV DVR systems tend to be analog cameras, connected to the security camera recorder via coaxial cables. DVR system components: analog security cameras and coaxial cablesĭigital video recorders convert analog video signal into a digital format. Analog video signal needs to be digitally encoded before it can be stored, so a DVR camera recorder encodes the signal, stores it, and also decodes it for remote viewing on demand. A digital video recorder, or DVR, is generally used with analog security cameras.
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