The purchase price of Coaxial cable+Sales in trade and export
This article will demonstrate some popular varieties and types of coaxial wire and cableto select and buy which are suitable forwiring the CCTV cameras and video surveillance systems.
Coaxial cable types
It is of the utmost importance to purchase a coaxial cable that is of the appropriate type and quality.
The foundation of a dependable CCTV system is a high-quality coaxial cable that has been tested and verified as meeting industry standards. This cable will deliver an excellent picture.
When installing surveillance cameras, you shouldn't make use of any old coaxial cable.
Before you make a purchase, carefully go over the product specifications. This tutorial is for security cameras that transmit video to DVRs and monitors using coaxial wires, and it applies to those cameras.
This encompasses both traditional analog CCTV cameras and the high-definition variants of security cameras known as HD-TVI, AHD, HD-SDI, and HD-CVI.
The building of a coaxial wire from scratch.
A form of transmission line known as a coaxial cable is used to send and receive electrical signals at high frequencies with little signal loss. It consists of an inner conductor that is surrounded by an insulating layer and then shielded by a conductive layer on all sides.
Additionally, they are outfitted with an insulated outer jacket.
The shielded design of the coaxial cable has been essential to its commercial success.
This design enables the copper core of the cable to quickly transport data without being hampered by electromagnetic interference or being damaged by the effects of the surrounding environment. The construction of a typical cable is depicted in the diagram that may be found below.
The center conductor is the conduit through which the electrical signal travels.
copper-clad steel is the conductor that is utilized for transmitting the signal.
polyethylene, which acts as an insulator, has dielectric properties.
shielding substance made of metal that is woven into a braid.
The cable is protected by a plastic sleeve.
The core conductor is shielded from any outside influence by the metallic shield, often known as the braid.
The dielectric insulator has two purposes: it shields the metallic conductor from the braid, which increases the cable's degree of pliability, and it protects the conductor from damage.
When installing surveillance cameras that make use of coaxial cabling, it is essential to select cables that contain almost pure metallic conducting material (it is suggested that the core be composed of 95% copper).
The caliber of the cable as well as its wall thickness determine the maximum length that it is capable of carrying data over.
There are many different kinds of coaxial cables, each of which is best suited for a particular type of CCTV installation job.
Different varieties of coaxial cables
RG59, RG6, and RG11 are the three most prevalent sizes of cable used today.
Radio guide is what "RG" stands for, and the numbers that accompany the various kinds of RG cable indicate its diameter (59 meaning .059, and 6 meaning .06, etc.).
You may also hear them referred to as RF cables, which is an abbreviation for "radio frequency." RG6 is the most common name for non-industrial coaxial wire these days.
The impedance of RG cables used in residential settings should be 75 ohms.
Siamese cable... what exactly is that?
The RG59 Siamese cable is a strongly insulated cable that incorporates RG59 coax cable for video transmission as well as a pair of 18 gauge power wires with two conductors into a single jacket.
In other words, you have a cable that transmits the television signal as well as a separate cable that transmits the power, both of which are joined together (like Siamese brothers, hence the name).
The use of RG59 cable for CCTV camera installation has a number of benefits, the most notable of which are that it is more resilient than the vast majority of pre-made camera cables and that it can be transported over greater distances without being disrupted.
Additionally, you may trim each cable run to the exact length that you require, which makes the cabling portion of the installation neat and tidy.
An up-close view of RG59 cable can be seen in the previous image.
There is no obscuring the view of the 18-gauge power cable or the RG59 coax component of the line at all.
RG59 Siamese cable can be purchased in spools of either 500 or 1000 feet in length.
In the event that your cable is visible to the naked eye and you have a preference in color, white and black cable are normally available to choose from.
What type of coaxial cable should I get for my surveillance system?
This is the information that you must have. Make sure to get RG59 cable that has a solid copper core or inner conductor and a braiding that is at least 95% copper. Take a look at the description in the image that is below.
These two components are highlighted, and arrows point to the sections of the cable that correspond to the components that they refer to.
75 ohms is the impedance that is associated with CCTV cameras.
You should make use of a coax cable that likewise has an impedance of 75 ohms if you want to experience the least amount of loss possible in terms of video.
There is also coaxial cable available at 93 ohm and 50-ohm resistance levels. These should not be used in any CCTV installations.
Always make sure to use a 75-ohm cable.
coaxial cable used for
What are your thoughts on using coaxial cable for high-definition CCTV (AHD, TVI, or CVI)?
RG6 is also suitable for use in CCTV systems. You can also have it with a solid copper core and inner conductor, as well as a copper braiding that is 95% copper.
RG6 cables are thicker and stiffer than RG59 cables, making them more difficult to work with.
However, RG6 cables can transmit video signals over greater distances than RG59 cables can (especially around corners).
When it comes to analog CCTV, RG59 has a rating of 700 feet and RG6 has a rating of 1000 feet.
RG59 is the cable that is most frequently utilized.
Similar to analog CCTV, high-definition closed-circuit television (HD CCTV) systems such as HD-CVI cameras, AHD cameras, and HD-TVI cameras operate at low frequencies.
For HD security camera installations, you should use the usage of RG59 or RG6 cable that has a solid copper core and a braided shielding of 95%.
These systems, which are known as "HD over coax," use the same cable as classic analog CCTV.
However, high-quality cable is even more critical for these systems because of the higher bandwidth requirements of the video because these systems use the same cable.
What about cable for resolutions of three megapixels, five megapixels, and four thousand kilobits per second?
The technology behind security camera systems that support "HD over coax" is continuing to advance and improve.
3 megapixel, 4 megapixel, 5 megapixel, and even 4K HD CCTV cameras are available.
DVRs that handle these resolutions and transmit HD video over coax are now also available.
If you wire your system using RG59 coax cable of high quality right now, it will be ready for an upgrade to any of these camera kinds at some point in the future.
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