Whether recording video or trying to view it, there are times when it is inconvenient to run wires. Anyone who has ever been in a television recording studio knows that there are wires running everywhere. But that is not the only place where video tends to require a lot of wires. A system with security cameras can require thousands of feet of wire, and even a home entertainment system requires cables for everything.
Running cables in an existing building can be extremely challenging, as walls and ceilings get in the way. Often, running a simple video cable can require making a mess of the wall, cutting the drywall or plaster, and having to repair it. This is time consuming and expensive work which inconveniences everyone while it is in process.
Cordless video connections can be a solution to this problem, providing a means of connecting video from the source to where it is needed, without tearing up walls or running cables. There are three different video applications where this is done, each of which has its own needs and equipment. The three are video production studios, security camera systems, and remote home usage. While the equipment used for each of these applications is slightly different, the concept is the same. It allows the video to be seen at a location that is remote from the source, without having to run cables to get the signal from one point to the other. Buyers should think about the type of system they have and its purpose in order to properly find a cordless transmitter to send video. It is important to know what exactly a cordless video system is, how it is used, and the basic differences between the cordless systems that are used in these three primary applications.
A Basic Cordless Video System
A cordless video system consists of four basic components: the video source, a transmitter, a matching receiver, and a monitor to view the video. Additional receivers can be added for additional locations, but the concept stays the same. Likewise recorders can be added into the system without any major change to how the system works.
When a cordless video system is purchased, it consists of a matching transmitter and receiver. These can be connected to any video source and monitor, special ones are not required. The source could be a video camera, DVD and Blu-ray players, or video receiver. The monitor can either be a regular television or a video monitor that is used for video production work.
Connecting the Cordless Video System
While a cordless video transmitter does not need a cord to go from the video source to the monitor or recorder, that does not mean that there are no cables in the system at all. In fact, the system does require two video cables. The first of these cables needs to go from the video source to the cordless system’s sending unit. A second video cable needs to connect the receiving part of the cordless system to the monitor or recorder. There is no cable between the two parts of the cordless system.
Connecting to Multiple Monitors
It is possible to use multiple receivers to capture the video signal in different places for use on different monitors or recorders. All that is required is to have multiple receivers on the same frequency. However, there is an easier and less expensive way to use the same video signal on multiple devices, and it involves splitting the output signal from the receiver to these various devices.
While it may be possible to connect the output signal to two devices without noticeable degradation of image quality, that would be the maximum. To use the video signal in multiple devices, a video amplifier and splitter needs to be added into the circuit. Failure to add this amplifier results in loss of colour depth in the image. If this goes far enough, the image might appear to be black and white.
Different Cordless Systems for Different Uses
As already mentioned, there are three different uses for cordless video systems. While it is possible to use the same cordless system for all three applications, there are actually separate systems developed for each of these applications.
Video Production Studios
The cordless video systems used in video production are of a necessity more complex than those used for other applications. While professional videographers and producers prefer wired systems for their greater security and lower possibility of interference, there are some applications where running cables just is not practical. This is especially true in cases where shots have to be made in awkward positions or that require a high degree of mobility on the part of the videographer.
There is another question which faces professional production studios, the one of high definition. While some professional work is still produced in standard definition, high definition is taking over more and more of the video world. Cordless systems for high definition video require a broader bandwidth to transmit their greater quantity of video information. These systems are of course more costly to purchase.
Another major difference in systems which are used for professional video recording is that they often have manual frequency adjustment with several different frequencies to choose from. This allows using multiple cameras on cordless video transmitters without the problem of one camera’s signal overriding another. The frequency range of these systems is also different than that used for other purposes.
Security Camera Systems
Cordless video systems used with security camera systems are probably the simplest of all. They allow cameras in remote locations to send their signal back to the security office without the trouble and expense of running lengthy cables. In this way, they are excellent for temporary set-ups or for external cameras, which are harder to run cables for.
Of all the types of cordless video systems, the ones used for video surveillance and security systems are probably the simplest. In many cases, the entire system is black and white, reducing signal bandwidth. The need for audio channels and remote control channels is also eliminated.
Remote Home Theatre Usage
Many homes now have entertainment centres in them. They centre around a large, flat-screen television, with a satellite or cable receiver, Blu-ray device and possibly even video games connected to it. The receiver also provides audio amplification for 5.1 surround sound speakers, increasing the theatre-like environment. All this is great when one is in that room watching a movie, but it does not help viewers if they are in another room watching on another telly.
A cordless video transmitter can solve this problem, allowing for remote viewing of all video sources on another TV. Systems designed for this type of usage also transmits the sound channels and often have a channel for remote control of the receiver and video player. While this adds to the complexity and cost of the system, it is much more convenient than having to constantly walk from one room to another in order to change channels, pause a movie, or rewind to review a segment again.
These types of systems can also be used for transmitting video from a computer for video streaming or remote viewing of a presentation which is on the computer. Installing a cordless video system of this type is much less expensive than paying the extra charge for a second cable box. There is no monthly fee for the second television, and the cost of the cordless unit is lower than the cost of a second cable box.
Buying Cordless Video Transmitters on eBay
You can find an extensive assortment of cordless video transmitter and receivers on eBay. They are easily located by typing the words "wireless video transmitter" into the search bar at the top of all eBay pages. The results you receive are probably predominantly systems for use in home theatre applications. The systems come packaged with a transmitter and receiver, which are designed to work together. There are also some systems that come with one transmitter and two receivers so that televisions in two remote locations can be fed a signal from the home’s central entertainment system.
The majority of these systems are new although there are some used systems as well. There is no problem with buying a used system, as there is nothing in these systems which can wear out. A used unit should work just as well as a new one. To be sure, you can ask the seller if they guarantee that the system can function upon arrival.
Cordless video transmission systems are a great convenience for viewing video in locations that are separated from the video source. It is much easier and less expensive than running the necessary cables through an existing building. The video quality is not degraded in any way and in some cases, remote controls can still be used through the same system.
It should be noted that like anything else transmitted over the airwaves, anyone with the right equipment can pick up the signal and watch it. Therefore, these systems should not be used to transmit private video footage that should not be available for anyone to view.
There are three primary ways in which these systems are used: professional video production, security camera systems, and home entertainment systems. Of the three, home entertainment is the most prevalent and least expensive. These systems also provide audio channels which the other types do not. In some systems, provisions are made for using a remote control through the cordless transmitter as well. When buyers are aware of the applications of cordless transmitters, they can painlessly find the right ones on eBay.