Posts Tagged ‘Through’

Distributing Video Over Cat5 and Cat7: Things You Need to Know About Video Distribution Through Cat5 or Cat7

When thinking of setting up your home video system, it means that you should know something about distributing video over CAT5 and CAT7 because it is the kind of system that will broadcast optimum performance. It also means that you can now have your source from a distance away from the display device, television or monitor.

There are three (3) general types of video distribution system:
1) Analog or Baseband
2) Internet Protocol
3) Radio Frequency

Any of these types may use coaxial cables, category 5 or more commonly known as CAT5 cables, CAT5e, CAT6, CAT6e or CAT7 cables. What are the differences between them?

1) CAT-5 distributes video up to 100M.
2) CAT-5e 350M.
3) CAT-6 and CAT6e distributes video as far as 550M to 1000M
4) CAT-7 is rated from 700M to 1000M.

Viewing Video Over CAT5 or CAT7

Video over CAT5 or CAT7 like those delivered by CATV, data, and telephone are all distributed in similar wiring closets. It delivers videos that may run along a distance of 100M for CAT 5 or even up to 1000M for CAT7. Video over CAT5 or CAT7 all goes out on the same cabling system. The system is channeled in a passive broadband balun that converts any uneven coaxial signal into a balanced signal through the video over CAT5 or CAT7. Even when distributed to different channels simultaneously, it will not slow down the network because the air analog signals do not travel on that similar network, and thus, it does not rely on the bandwidth of the video signals.

Presently, the use of FTP or UTP cables for audio and video needs is prevalent. Instead of using coaxial cables, CAT5 and CAT7 cables are used. Coax are first installed into the hubs and everything else is distributed through the FTP/UTP. Video over CAT7 or CAT5 for that matter are now possible at a limited cost. There is ease in the installation and location change is not a big deal. All one needs to do is connect patch cords from the distribution hub to the patch panel and have a single port converter connected to the television.

Advantages of a Video System Using CAT5 and CAT7

1) Video over CAT5 or CAT7 is cost effective as it eliminates the need for additional coaxial cables.
2) Configuration of video over CAT5 or CAT7 is much easier than having multiple splitter taps, amplifiers and combiners of coax.
3) A high quality signal is maintained as the distribution system of video over CAT5 or video over CAT7 uses active RF video hubs. It makes automatic slope adjustments hence all video channels’ image quality is sustained.
4) The video distribution system of CAT5 or CAT7 can carry out voice and auxiliary signals simultaneously. There are no interferences between the voice and video data.
5) A system with video over CAT5 or CAT7 allows video streaming from the computer and it is made possible through a broadband video system.

Distributing video over CAT5 and CAT7 is made possible through an RF broadband system. It broadcasts CATV, HDTV, internally generated video, video-on-demand services, and satellite videos through twisted pairs of CAT5 or CAT7 cables.

Know the difference of how your video system will work. Systems working with video over CAT5 and systems running video over CAT7 will have their own advantages and disadvantages that you have to evaluate.

Be the first to comment - What do you think?  Posted by admin - March 23, 2011 at 3:55 am

Categories: Video   Tags: , , , , , , , , , ,

Sound Wave Transmission Through Surfaces

We are so accustomed to the many sounds audible to us at any given time that we hardly pause to distinguish what we are actually hearing or why. Hearing a combination of sounds around your home, such as the dishwasher running, cars passing by and a neighbor mowing the lawn is so commonplace that it does not generally warrant a second thought. However, there is an intricate science behind sound behavior that explains why we hear certain sounds and with what intensity.

A sound wave is an organized vibration which passes energy from particle to particle through any molecular structure. You hear the voice of someone in the same room speaking to you because the energy travels through the molecules of the air and reaches your ear. Likewise, you perceive sounds from outside such as traffic or a lawn mower because the vibrations produced by these sound sources travel through the molecules of the air and through the structure of your home to deliver a portion of the sound energy to your ears.

In this illustration, when the sound vibrations produced by the neighbor’s lawn mower change mediums, a portion of the sound is reflected off of the outer surface of your home while the remainder transfers through the surface and becomes audible within your home. The energy bouncing off of your home and remaining outside is sound reflection, while the energy traveling through the structure and into your home demonstrates sound transmission. Since wood, drywall, concrete and water are made up of molecules, sound energy travels as easily through such structures as it does through air.

Sound transmission can be measured using a metric known as the Sound Transmission Coefficient (STC). The STC rating is a numeric value which describes a wall, floor or ceiling’s propensity to prevent sound transmission. The typical wall with studs and drywall averages an STC rating of 38. A room with an STC rating of 38, for instance, would affect a 38 decibel drop in the audibility of incoming sound in a controlled environment.

While decibels describe the intensity of a sound wave, Hertz is a measure of its frequency, or the number of cycles occurring over a specified time. One Hertz is one vibration, or cycle, per second. Sounds with higher frequencies have a higher pitch. Low frequency sounds, such as bass, have flatter, longer sound waves which travel more easily through surfaces than do higher pitch sounds. Higher frequency sound waves, having a high Hertz value and thus more up and down movement in the cycle, are less successful at traveling through surfaces because they must overcome more distance and time within the structure. Comprehending frequency allows you to better understand why you are able to hear the low pitch lawn mower next door yet you cannot hear the neighbors having a conversation from the same distance.

The behavior of sound waves of differing decibel levels and frequencies accounts for the highly individualized nature of soundproofing and sound reduction projects. It is advised to consult with a reputable soundproofing supplier prior to any soundproofing endeavor so as to ensure that an effective solution for your application is reached.

About the Author: Mark Rustad is President of NetWell Noise Control, based in Minneapolis, MN. Founded in 1991, NetWell is a leading supplier of soundproofing products including acoustic foam as well as online acoustical consulting services. NetWell?s sound management skills are packaged into the industry?s premier website. Discover first hand why so much of NetWell?s business stems from the referrals and repeat orders they receive from satisfied clients around the world.

Be the first to comment - What do you think?  Posted by admin - February 28, 2010 at 3:03 pm

Categories: Audio   Tags: , , , ,

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