A wireless video transmitter, or TV sender, is used to connect home entertainment and AV devices in a home or a business. These transmitters are also used to connect security cameras to displays and recorders. For instance, a home security system can be set up that utilises a video transmitter for cameras that monitor the front door, or a home theatre can be set up with wireless transmitters to allow video signals to be beamed to different TVs in the home.
A buyer can purchase a wireless video transmitter at a local electronics stores, some department stores, or at online venues such as eBay. Before buying a wireless video transmitter it is a good idea to understand the technology, what purposes wireless video transmitters are used for, and the different devices that can be used with a wireless video transmitter. eBay offers a wide section of wireless video transmitters for use with security and home entertainment systems.
What Is a Wireless Video Transmitter?
Wireless video transmitters are devices which allow a picture from a video source to be displayed on a screen that is not connected via wires to the transmitter. Video analogue and HD signals can be transmitted from a wireless transmitter along with the audio signal. However, video transmitters designed for security applications, or surveillance monitoring only, can only transmit video, not audio. Wireless video transmitters use radio waves to send signals. A receiver on the destination display converts these video signals into a picture.
Wireless video transmitters can connect satellite set-top boxes, DVD recorders or players, or a home security cameras with TVs and monitors. A wireless video transmitter can broadcast its signal through walls and is most effective over short distances.
To use a wireless video transmitter, one simply connects the transmitter to the output port on a set-top box, DVD player or other video source, and then connects the corresponding receiver to the second TV or destination screen. Digital signals can then be sent over the air to the receiver via the 2.4 GHz to 5.8 GHz radio bands. This bandwidth operates over a range of up to 80 metres. However, if the signal has to pass through several walls, the effective rage of the signal is reduced.
Security Camera Systems
Wireless video transmitters are used to send a video signal from any AV or HD video source to a receiver in another location. They are also used to connect security cameras to display monitors. No matter which type of wireless video transmitter one chooses, there are certain issues the buyer should be aware of when it comes to wireless video transmitters used for security. The signal and hence the quality of the images can be adversely affected by signal interference and physical obstructions. Understanding the ways in which to fix these issues certainly helps to alleviate any headaches down the line.
Radio frequency interference, or RF interference, is one of the major problems that can plague wireless setups. This is because there are so many wireless devices in operation today. Many of these wireless devices, like cordless phones, function using the same radio frequencies as video transmitters. To determine if this is the problem, one should turn on the wireless receiver without turning on the wireless video transmitter. If any symmetrical picture is displayed it is likely that there is interference. Analogue wireless video is more susceptible to interference than HD wireless transmitters.
If the security system is an analogue system, the simplest way to fix the interference is to switch the channel. If that has been tried and switching the channel fails to to fix the problem, consider buying a new wireless video transmitter, and if one owns an analogue security system and wants to upgrade, the wisest course of action at this point is to upgrade to a digital system.
An obstruction refers to anything that is between the transmitter and receiver and is obstructing the signal from reaching the receiver successfully. Although wireless videos can transmit through walls, there is always some degradation of the signal. If obstructions like walls or thick trees are unavoidable, the solution is to get the transmitting and receiving antennas up as high as possible, as many of the obstructions that the signal encounters include furniture and other items sitting on the floors.
TV senders eliminate the need to string cables through the house from a camera to a monitor or from a set-top box to a TV. However, they do require a power source, and either a power cord or batteries are required to operate the device. If the transmitter is used continuously, a dedicated power outlet is a better choice than batteries.
The most common use for wireless video transmitters is to connect cable or satellite boxes to other TVs in a home. This is particularly useful if one wants to watch TV in a room other than where the set-top box is situated. For instance, if the box is in the living room and one wants to watch TV in bed, a transmitter allows the user to access satellite programming without having to spend large amounts of money on running cables from the bedroom to the TV room. These cables can be difficult to install, and possibly dangerous if installed incorrectly. Wireless video transmitters, or AV senders, allow homes to become effectively wireless.
One disadvantage to using a wireless video transmitter is that the viewer is not close to the source equipment and so cannot change the channel or control the playback. For instance, if one is watching TV in the bedroom via the wireless video transmitter, the user does not have a clear line of sight to operate the remote control. Without the line of sight the remote cannot change the channel from the bedroom. However, there is a way around this dilemma. By using an infrared (IR) extender, the user can send the remote control signal back to the transmitter. In many cases the remote is able to work from the bedroom. If the system does not include an IR extender, a user can buy one from eBay.
Wireless HDMI Transmitters
Wireless HD, or WiHD, operates over high frequency radio bands and for this reason is able to transmit compressed and uncompressed high definition signals. The frequency at which it is transmitted has much more available bandwidth than that which is available at the analogue level. Wireless HD has the ability to work at 25 GBps, making it a very powerful signal. This type of technology requires the transmitter to be in line of sight of the receiver connected to the HD television.
A wireless HD signal can be sent from an HD transmitter to an HD television equipped with a receiver in the HDMI port. The signal sent by wireless HD is capable of passing through walls, however, a second type of wireless HD signal, the WHDI configuration, needs the transmitter to be in the same room as the receiver. Although this can seem like a huge disadvantage, the saving grace is that a WHDI home theatre can support 3D content while the WiHD system cannot.
HDMI wireless transmitters do not suffer the same inference that plagues TV senders. AV signals from DVDs, DVRs, CCD cameras, satellite set-top boxes, HDTV set-top boxes and Blu-ray devices are transmitted by radio waves and are received at the destination, decoded, and played as video on the television. Because this setup has the capability of transmitting over long distances, often the remote needs an IR extender to enable one to continue using it at a distance from the transmitter, however IR models require line of sight to operate properly.
How to Buy a Wireless Video Transmitter on eBay
When you are ready to get started, enter specific keywords such as 'wireless video sender' into the search bar at the top of eBay's homepage, and hundreds of listings will be generated. Or, if you are interested in an HD video transmitter, simply enter that phrase into the search bar and the results will be dramatically reduced, making it easier to find exactly what you want. If you have specific requirements, such as particular price range, you can modify the search to include various search criteria to filter the results.
While reviewing the listings generated, you do have the option to sort the listings based on the type of seller. There are sellers who are referred to as eBay Top-Sellers and have ribbons next to their usernames. These ribbons indicated that they have achieved Top-Seller status. Choosing a seller with this designation increases the likelihood of a positive shopping experience. Top-sellers are more likely to be able to help you should you have any questions about whether or not the wireless video sender they have listed is compatible with your equipment.
There are many uses for a wireless video transmitter today, so whether a security camera is needed or a home theatre setup for multiple televisions, there are specific wireless video transmitters for each purpose. There are many options available for wireless video transmitters, and having the ability to choose from hundreds of listings on eBay is a great benefit. With the eBay platform, one can interact not only with the seller, but with other buyers as well to ask questions about any item prior to finalising the purchase. This can prevent any mishaps that could happen from selecting the wrong wireless video transmitter.
The buyer should consider how far the devices are from each other, as well any other wireless devices in the home or business that could cause radio interference. By taking the time to review the product feedback, as well as the seller's feedback, a seller is better able to come to a final purchasing decision about the right wireless video transmitter for their home or business.