In many CCTV installations that use DVR, the customer wants to see the images through a monitor connected directly to the recorder.
For this type of installation it is necessary to use monitors and HDMI or VGA cables, and today the best choice has been the first one.
Many technicians are faced with different types of situations when they are installing the cables, and in this article I will explain a little about the standards of HDMI technology and its versions.
Let's learn how to choose the best HDMI cable for CCTV.
All cables have their distance-related limitations, and in the case of HDMI the maximum distance recommended by the pattern's engineers is 50 feet.
There is a lot of discussion about qualities of HDMI cables and obviously there are big differences in prices, in the market it is possible to find the so famous xing lings, and also others that sell their cables at very high prices, stating that they provide better image.
The question is actually simple, the cables deliver the video or not, that is, if that cheap cable you bought at Santa Ifigência allows you to get a picture of your DVR on a FullHD monitor, the other cable that costs a lot more will not make a Work, it's just a question of whether or not to display the image on the screen.
Should I Always Buy Cheap HDMI Cables?
I do not recommend buying those poor quality HDMI cables because there are other factors involved besides showing the image as explained above.
Depending on the physical quality of the cable, maneuvering movements can damage it. So you can stay between the cheaper and more expensive cable, that is, you do not have to spend something very expensive, but you do not have to be a wobbler to the point where you buy cables of very poor quality
Be very careful when buying cables on the market that have poor quality material that causes the pins to be damaged when inserted into equipment such as DVRs or TVs.
More details about the HDMI standard
The HDMI standard was created for multimedia transport in high definition, hence its name High Definition Multimedia Interface which means that it can transport audio and video in high definition in digital format, this pattern has evolved with time for different versions.
I will not go into many technical details here, but basically the standards created for HDMI are related to the speed that can transmit multimedia content (audio and video) and other features like the use of images in 4K (HDMI version 1.4) or transmission Of two simultaneous images (HDMI version 2.0) which also allows higher frame rate (4K at 60FPS).
In the market it is possible to find equipment with different versions of the HDMI standard, ie the product manufacturer's manual should indicate which version of HDMI is available (although most manuals do not mention anything about it)
But pay close attention to what I'm saying ... HDMI versions like 1.4 and 2.0 are related to the equipment,
I'm not talking about the cables, that is, do not fall for the tale of buying a cable that some vendor pushes you saying it's cable HDMI 2.0, this is not correct. It means that your I own a cable that I use in devices that have version 1.4 as a Blue Ray player and a TV and want to use that same cable in new devices that are version 2.0, like the modern TV for example, this cable goes serve ?
Exactly, your old cable will serve because the pin patterns are the same, do not think you have something super special on a new cable that the seller wants to push you, the default is on the devices and not on the cables, so it is not necessary to swap for new and more expensive ones.
HDMI cables that used for versions like 1.4 will work for version 2.0, buy good quality cables but do not pay to high for them, keep in mind the recommendation of 15 meters and do not fall for someone pushing you ninjas HDMI cables that exceed this distance at more expensive prices, if you need to go beyond this distance use repeaters.
More details on standards and versions can be found on HDMI.org's own website (www.hdmi.org), they are reliable information as they are the engineers and creators of the standard. (Though you'll always find that salesman who thinks he knows more than everyone else and will continue with daunting explanations to push you on another cable
Claudemir Martins is a former Samsung Engineer with 15+ experience in the surveillance industry. He has been traveling around 17 different countries to teach people how to design, and install CCTV systems.