Question: How to save money while watching multi TVs in home?

Source: Question: How to save money while watching multi TVs in home?

In fact, there are many families have not just one television in their house, like living room have one, dining room have one, bedroom have one, and one cable box(set top box) can only connect one television. If need to watch three television in home, we need buy three cable box and running more long cables. That's not a good way!

But if there is a wireless device for transmitting the tv av signal from one cable box to multi room's TVs, then the problem will be resolved easily. Is there really a wireless device like this? Yes, it's av sender, also known as video sender, or wireless tv sender. There are two types of interface for it, they are RCA port and HDMI port.

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How to Read Wireless Audio/Video Transmitter Specifications

An audio video transmitter, known as av sender, sometimes called a wireless tv transmitter, can be used to share the satellite TV connection in the living room with a TV in the bedroom or kitchen without moving any devices, and one set av sender contain a transmitter and a receiver. This can be a great convenience for people who have multiple televisions in their houses, and do not want to have to move a device like a DVD player from room to room, unplugging and plugging in cables and power cords, just to watch a movie on a different TV. Instead, users can send the information to the other television using an audio/video transmitter.

Transmitters are devices that broadcast a signal from one device to another, creating a larger distribution network and allowing more devices to connect to the service. Because they combine wireless technology with basic television technology, the specifications listed can be difficult to understand. Below is an explanation of each specification area and what to look for when making a purchase.

History of Transmission

The modern audio/video transmission system did not begin until 1936, when Don Lee began demonstrations and prototype testing for a broadcasting system that transmitted 30 lines. These transmissions contained only black and white images. The first color transmissions began in 1954, when compatible TVs became available on the market. Black and white transmissions were completely ended in 1975. In the mid-1990s, many stations began updating to digital service, and offered users a digital option. In 2009, the United States eliminated analog video transmissions, and began transmitting solely in digital.

Different Specification Areas

There a variety of different specifications that a user needs to be familiar with before purchasing a wireless av sender.

Transmission Method

Today, there are two main types of transmission used, cable transmission and wireless transmission. Cable transmission uses common coaxial cable to connect the transmitter and the receiver. Wireless transmission systems use wireless radio signals, much like a wireless router, to transmit the information to the receiver. Some older video/audio transmitters also used infrared signals to transmit information. When using infrared technology, the transmitter and receiver had to be in direct line with one another without barriers for information to be transmitted. Wireless technology rapidly made these infrared devices obsolete. When looking at various audio/video transmitters, consider the transmission method that will work in the locations where the transmitter will be used.

Watts

Video transmission systems for home use are available in one, two, and five watt varieties. Long-distance systems designed for business use, however, are available in 10 and 20 watt as well. The number of watts relates to the amount of power needed for operation and can affect transmission distance; however, a two-watt system is capable of long distance transmission, so users need not be concerned with low wattage affecting performance. A low-watt system will save users money because they impact electrical bills less. Typically, one watt will transmit over 1000 feet, three watts will transmit over seven miles, and 20 watts will transmit over 50 miles. When looking at audio/video transmitters, choose the lowest wattage possible to save on electrical expenses while still covering the necessary distance.

Frequency

The system's frequency dictates what radio frequency is used to transmit information between the transmitter and the receiver on wireless transmission models. If the transmitter is running on the same frequency as other household devices, it will cause interference and degrade the quality of the sound and video being transmitted. Common frequencies include 900 MHz, 1.2 GHz, 1.3 GHz, 2.4 GHz, 5.4 GHz, and 5.8 GHz. Which frequency is best for a user depends on what else is being used in the space that could cause interference. Many radios run on the 2.4 GHz bandwidth, as do remote controls, microwaves, phones, and even wireless routers. It is illegal to use 1.2 GHz devices in the United States because it is a reserved bandwidth. As a general rule, the higher the frequency of the audio/video transmitter, the less likely it is to experience serious interference from other devices in the home, and the more robust it is, making it less likely to deteriorate as it passes through barrier objects. Because of this, buyers should consider higher frequency audio/video transmitters and those on frequencies that are not already being used in the home or office to avoid interference problems.

Range

Range determines the number of feet the audio/video transmitter will spread the information. All receivers working from the transmitter must be within this range to receive a strong and uninterrupted signal. Range is determined by a combination of the wattage, frequency, and signal strength emitted. Remember that the range given in the specifications section is a maximum range and is only an estimate. If there are barriers in between the transmitter and the receiver it will shorten the range; this happens because the signal strength will be lost to some degree as it passes through the barrier.

Number of Channels

Channels are labeled with letters rather than numbers, and do not refer to the number of television channels they can transmit; rather, changing the transmitter's channel means altering what air channel the transmitter is sending signals in. The transmitter and receiver must be set to the same channel for information to be appropriately transmitted. Small transmitters may only use one or two channels, while long-distance transmitters may have up to eight channels, such as PAKITE wireless av senders are 8 channels. By changing the channel that the audio/video transmitter is using, the user can eliminate part or all of any interference that is experienced and improve picture and sound quality.

Maximum Resolution

Resolution is a measure of lines being transmitted to a device. Keep in mind that the earliest transmissions had only 30 lines, and that the standard analog TV has 460 lines of color. Today, televisions typically have between 760 and 1080 lines. This number is also accompanied by a letter: p stands for progressive scan, and i stand for interlaced lines. Resolutions with progressive scan technology create a better picture than those with interlaced lines. It is important that the maximum resolution transmitted by the audio/video transmitter is at least as high as the resolution of the television being transmitted to. For example, if a television has a resolution of 760p, there is no need to have a transmitter that transmits at 1080. 1080p is the highest current resolution for high-definition televisions and transmitters.

Dimensions

The dimensions given, typically in millimeters (mm) or centimeters (cm), are the physical dimensions of the transmitter. These are important to know if the user has a specific space in mind for placing the transmitter and needs to make sure that the transmitter selected will fit. Dimensions are typically given in the LHW format, which means the first number given is the length, the second number given is the height, and the third number given is the width.

Transmitter Input Connection and Receiver Output Connections

The transmitter must be able to connect to the signal source, like the cable or satellite box, and the receiver must be able to connect to the television or viewing device. Below is a chart that shows the most common cable types, how they can be recognized, and what information they transmit. Make sure that the transmitter and receiver are fully compatible with the signal source and the viewing device before selecting a transmitter for purchase.

Cable Type	How to Recognize It	Information Carried
Coaxial Cable	This is a traditional antenna or satellite cable. It has a single pin in the center of a screw-on metal end.	Carries both audio and video in a single wire
Composite	RCA or AV port. Video is marked with a yellow end, and sound is marked with red and white, for the left and right sides.	Carries video and audio when all three cords are used in tandem. Some cord sets are individual and some are permanently bound by a plastic exterior.
S - Video	Has a 4-pin plug-in style connector.	Transmits video only; sound must be transmitted via composite sound cables.
Component	The cables are color-coded: blue, green, and red.	Three separate cables are used to carry brightness, color, and luminance. Red and white composite cables must be used for sound with this video system.
HDMI	Multi-pin, long flat connection used to connect most high-definition devices.	The highest quality, highest speed cable connection. It's just used for HDMI av sender. It is only compatible with high-definition devices.
USB	Rectangular USB end, like those on the end of flash drives and other computer products.	Sends both audio and video information using a high-speed USB cable. Useful in connecting to computers and projectors. Also necessary to load updates on updatable transmitters.

When selecting an audio/video transmitter, buyers should be sure to choose a transmitter with the right connections for both the signal source and the receiver television.

Repeater Specifications

Transmitters may or may not come with a repeater. A repeater is exactly what it sounds like, a device that repeats the single being transmitted. A repeater connects to the transmitter remotely, and sends out a duplicate transmission signal. This means that it expands the range and enables devices that are outside of the transmitter's range to pick up the repeater's signal and access the information. They must be programmed to the same channel as the transmitter and the receiver.

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Wireless Video Transmitters

How to Connect a PC to a TV by Wireless ?

Do you want to watch movies and videos on “big screen”? for family game night or music and social-media sharing with friends at parties. Or you might just want a bigger screen as you study or conduct research. Whatever your lifestyle or needs, it’s easier than ever to connect your PC to the TV, so here are a few ideas for making that a smooth process.

Basics

First, both your PC device and TV need to be on the same wireless network. That’s a priority common to both initial setup and any later troubleshooting. Confirming your equipment compatibility and correct routing also are keys to success, and that’s true regardless of which connection method you’re using. These methods may include Intel WiDi, HD wireless adapters, or simply direct connect with the increasingly common and hassle-free feature of built-in WiFi in your devices.

Intel WiDi

With Intel WiDi, you can stream directly from PC to HDTV, provided you have a certified WiDi receiver device. Intel Wireless Display features high-quality content delivery, with the ability to split screens and multitask. Tutorial videos are straightforward and offer simple walk-through menu pathways to add the device and activate projection. New, low-cost adapter options and Intel WiDi apps also make it possible to make the most of the wireless Intel WiDi connection.

Wireless HDMI Connection

Many laptops are HUMI-ready, and the port designated for HDMI cable use is available for wireless use, too. A number of kits on the market make it easy to connect without a cable by using a small, plug-in transmitter with a matching receiver. Other connection options between your TV screen and your PC -- or your handhelds, too -- include apps that are especially helpful for displaying and sharing content in the business networking or conference setting.

The Future of Wireless

At home, the TV is still the top screen choice for entertainment -- but more consumers are using it together with PCs and other devices, especially competing tablets and mobile handhelds common to “second screen” experiences. Experts expect more than 50 billion Internet-connected devices by 2020, twice the volume now, including refrigerators and appliances as well as TVs! So keep an eye on the Internet of Things future when considering your tech investments and capabilities today.


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How to Avoid Distortion in A/V Transmitters

Sources: CNBgear . How to Avoid Distortion in A/V Transmitters

An audio / video transmitter, or AV transmitter, is a wireless device that sends audio and video signals from one device to another. The simplest explanation of how it works is to think of a TV signal, but on a far smaller scale. Instead of the TV station transmitting a signal to everyone who has a TV aerial, the transmitter sends a signal only to a specific receiver. Using this type of equipment allows one to send an audio/video signal from one device to another without needing to run a cable between rooms or equipment. Simply connect the transmitter to one device and the receiver to another.

As with all wireless signals, one can experience distortion or signal loss. This is aggravated by factors such as objects blocking the signal and a loss of line of sight. Loose connections, or poor signal can further complicate matters. Poor signal can be the result of issues like low quality hardware, damaged devices, or other faults. In order to minimize distortion one should shop carefully, doing adequate research through customer and expert reviews. Consumers must understand which specifications to look for in audio/video transmitters. AV transmitters are available from electronics stores or online.

Unfortunately, AV sender have not evolved to the level where they are readily compatible with HD devices. In addition, they are never completely wireless and need a main source of power to function. They have to be plugged in and switched on to work. While wireless technology is convenient and fast, coaxial cable connections give consistently better results. However, fixed cabling systems may be unsightly, more expensive, and impractical.

How Audio/Video Transmitters Work

Connecting a wireless AV sender to a TV, DVD player, or other AV device turns the device into a broadcaster of video and audio signals. Connecting an AV receiver to another device within range turns that device into a receiver that is able to decode the signal sent out by the transmitter. Audio and video signals can be transmitted throughout one's home and some AV transmitters even allow one to change channels from a distance. However, one may need a remote control extender for this function. Installation is usually simple. Antennas are normally built into the sending and receiving units and all that is required is connecting the cable to the correct jack or connection. AV signals are usually transmitted via wideband FM (frequency modulation) signals that may help minimize interference from other transmitters.

The best way to avoid distortion in wireless video transmitter is to choose the right sender based on specifications and reviews. Specifications include the frequency it broadcasts on, the range it covers, and the type of antenna the device has.

Broadcast Frequencies

Many AV transmitters broadcast signals in the 2.4 GHz frequency band. Unfortunately, this is also the band used by 802.11b and g Wi-Fi devices, as well as microwave ovens, cordless phones, and a number of other consumer electronics. These devices can cause interference, which leads to distortion and signal degradation. Transmitters that broadcast on a different frequency, like 5.8 GHz, are far less prone to distortion caused by interference.

Some transmitters feature adjustable frequencies (or channels) to allow users to find the best settings with the least amount of interference and distortion. The transmitter and receiver must be on the same channel for the set to work effectively. Where reception is poor or there is a large amount of interference one can adjust the channel to eliminate interference from other electrical devices. Some devices, like microwave ovens, may cause interference on all channels. If buying a transmitter that works on a higher frequency is out of the question, the simple solution to this problem is to use only one device at a time.

Broadcast Range and Signal

As with most wireless devices, AV transmitters rely on line of sight for clear, strong signals. One should always place the transmitter and receiver in open, uncluttered, unobstructed areas where the sender and receiver can "see" each other. In other words, the two devices should be in each other's line of sight. To better understand this, think of listening to the radio while driving. The moment one enters a tunnel or drives between high hills or mountains, the car's radio antenna loses line of sight with the radio station's sender and the signal cuts out or distorts.

Some transmitters are marked with the maximum range over which signals can be transmitted without obstructions between the sender and receiver. These are often somewhat optimistic, but can be used as a guideline for comparison nevertheless. Few homes are obstruction-free over the distances quoted by manufacturers, but some may wish to broadcast signals to rooms or areas outside the house. Some units are designed for outside use, with waterproof coverings and a more robust design. These transmitters boast range distances of up to 20 times that of indoor transmitters, but the range drops off significantly the moment an obstruction is encountered.

Antenna Types

The majority of transmitter types come with built-in antennas, but some transmitters feature adjustable antennas. These may need to be adjusted to find the best signal, or realigned to eliminate distortion. Where one is using more than one sender or receiver, antennas may need to adjusted every time one swaps between devices.

Using Customer and Expert Reviews to Choose an AV Transmitter

In addition to taking the factors above into consideration when choosing an av sender, one should also do research by reading customer and expert product reviews. Customer reviews should, in some cases, be taken with a grain of salt as people are more inclined to post about negative experiences than they are about positive ones. However, this can be read in conjunction with expert reviews to see how devices perform in real life situations, and how the features and benefits highlighted by manufacturers compare during day-to-day use.

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How to Transmit Cable TVs by Wireless?

Wireless technology is seemingly ubiquitous, but many people still use tangles of cables to connect TV sets to cable outlets. Homes that have more TVs than cable outlets or in situations where an outlet is far away from the TV, transmitting cable wirelessly can be a great solution — not to mention a terrific way to clear up all those cords. Transmitters are easy to set up and use, banishing messy wires for good.

Wireless Cable Transmission to a TV

To send cable signals to a TV, users can hook up a wireless video transmitter. Most transmitter receivers can pick up signals from 50 to 100 yards away.

Necessary Supplies

Wireless video transmitters(what is it?) have two components, a transmitter and a receiver. The transmitter hooks up to a video source such as a cable box, DVD player, or Blu-ray player, and the receiver hooks up to the TV.
There two kinds of wireless transmitters available, RCA transmitters and HDMI transmitters. RCA systems, such as the RF-Link Wireless Audio/Video System and the Terk Leapfrog Wireless Audio/Video System, connect to TVs, set top boxes, and other video sources using three-pronged RCA cables, which are compatible with most TV models. HDMI transmitters, such as the PAKITE Wireless HDMI Digital Kit, connect to other devices using HDMI cables, which can transmit HD video signals.

Setup Steps

To set up the system, plug the receiver into the RCA or HDMI port on the TV. Plug the cable box into the transmitter. If the transmitter has multiple inputs, then users can also connect other video devices, such as Blu-ray players and video streamers.


Article from: http://www.ebay.com/gds/How-to-Transmit-Cable-TV-Wirelessly-/10000000205355025/g.html


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How to Convert a Home Theater to Wireless

How to Convert a Home Theater to Wireless

Sources: How to Convert a Home Theater to Wireless

 

Home theaters can quickly bury a room in wires. Even if the wires connecting the television to the video equipment are well-hidden, surround-sound speakers need to be placed all around the room for a full home-theater experience. These speakers all require separate wires, which can quickly make for a mess. Thankfully, converting a home theater to wireless sound is quite easy. Wireless video is another story, with technology still being developed. With a few investments in transmitters, you can get rid of many of the wires in your home theater space.

Wireless Home Theater Audio

Convert your existing speakers to wireless. This can be done by purchasing powered transmitters and receivers. Disconnect the speaker wires and use shorter ones to connect your home theater's audio output to a transmitter. The receiver is a small unit that sits next to the speakers on the other side of the room. These speakers must be plugged into the receiver with short audio cables, and the receiver still needs to be plugged into the wall, making this option not 100 percent wireless.

Buy purpose-built wireless speakers. These will still need to be connected to a wall outlet for power, but have the receiver built in to eliminate clutter. Some also offer more flexible adjustment of sound delay settings, which can make for a more realistic surround sound effect.

Place battery-powered speakers around the room. Battery-powered wireless speakers do exist, and eliminate the need for a power outlet connection. They function in the same way as other wireless systems, with a transmitter connected by audio cables to your system's sound output. Most home theater enthusiasts regard these as an ineffective solution, as the limited power provided by batteries doesn't give the speakers enough volume to be truly effective in a home theater context. If you can tolerate quiet and the need to change batteries, though, they can make the system fully wireless.



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How to Convert Cable TV to Wireless

How to Convert Cable TV to Wireless

 

Hardwiring a television to a cable outlet seems antiquated when more and more electronics are moving toward wireless technology. Convert your cable TV to wireless by using a wireless RF transmitter and receiver ( wireless av transmitter and receiver fit for RCA port device, and HDMI av sender fit for HDMI port device ) to transmit signals from the cable box to the TV. This gives you the freedom to move a television to the other side of the room or house without having to move the outlet as well. By choosing the right equipment, connecting the wireless transmitter and receiver, and configuring the wireless signal, you can enjoy cable television free from wires.

1 - Choose Wireless Transmitter-Receiver Equipment
Several brands and models of wireless transmitters and receivers that deliver RF signals are available, and each model offers different features and capabilities. These systems work on frequencies that do not interfere with other devices in the home, such as microwaves and cordless telephones. They typically operate at frequencies of 2.4 GHz and 5.8 GHz. Choose one that operates at a frequency different than the frequency of other devices in your home to achieve a good signal and a clear picture.

While many wireless transmitters and receivers work for a single television, there are a handful that offer expandability options. To connect several televisions to a single cable outlet wirelessly, choose a system that has multiple receivers and a transmitter that can accommodate them.

2 - Connect the Wireless Transmitter to the Cable Box
The wireless transmitter connects directly to the wall outlet or the cable box. Connect the coaxial cable from the wall to the "RF IN" port on the transmitter. If you are connecting it to a cable box, connect a line from the "RF OUT" connector on the cable box to the "RF IN" port on the transmitter. Connect the AC adapter to the transmitter and plug it into a standard outlet. Power the device on and select the channel output.

3 - Connect the Wireless Receiver to the TV
The wireless receiver connects directly to the television using either an HDMI cable or a coaxial cable. Choose a short cable so that it is easy to conceal the receiver behind the television. Choose a longer cable to conceal the receiver inside an entertainment system.

Connect one end of the cable to the receiver and the other end to the appropriate HDMI or coaxial port on the television. Connect the AC adapter to the receiver and plug it into an outlet. Power the device on and select the channel output that matches the channel you selected on the transmitter. Repeat this process for all receivers.

4 - Set Up Your Television
When connecting an external device to a television, like a DVD player, VCR, or cable box, always plug them into the proper inputs. From the input menu on the screen, select the one that you connected the receiver to. If you use a coaxial connection, tune the television to the channel selected on the devices. For many televisions, this is channel 3. If you connect the receiver using an HDMI cable, tune the television to the appropriate HDMI input.

5 - Configure Your Wireless Signal
The transmitter and receiver each have a paddle or antenna that allows the two devices to communicate with each other. You may need to adjust the paddles on occasion to get a clearer signal. When first installing the system, point the paddles toward one another. After initial installation and turning on the television, make minor adjustments to the receiver until you obtain the clearest picture.

6 - Install the IR Remote Extender
If the television is in a different room and the cable outlet or box in another, install an IR remote extender so that you can use the standard remote. This boosts the IR sensitivity so that you do not have to worry about furniture or walls blocking the signal. Install the IR extender to the wireless transmitter and then place the receiver in an open area. Typical placement is near the IR receiver of the cable box. You can use the remote as normal to control the television.




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How to Install your Wireless Cable TV

It seems that any home you visit has at least two smart devices. Now, smart technology has been integrated into everyday home appliances like the stove and refrigerator, but the most popular smart appliance today is the smart TV. These TVs are capable of doing anything from streaming videos to downloading apps, and they're a lot sleeker than they used to be. This is why so many smart TV owners mount their televisions.

When it comes to mounting, there isn't much one can do with bulky cable boxes other than hide them away. However, you can purchase a wireless cable box that will at least eliminate the need for cords. If you plan to buy one, here are a few easy setup instructions.

Connecting Your Wireless Cable TV Box

First, let's assume you're not going to place the wireless cable TV transmitter near the television itself. Start by moving your cable box to a place that has some space alongside it. Next, place the wireless cable TV transmitter next to it. Then connect the two boxes together using the HDMI cord supplied with either. The HDMI cord enables video and audio transmission from one source to the other. To check that the connection is working, plug both boxes into the wall. If the lights come on, the connection is intact.

If you wish to hide those two boxes from sight, you can. Just make sure the infrared area is easy to see. The transmitter sends information to the receiver using the infrared.

For the second step, plug the HDMI into the back of the wireless cable TV receiver then bring it close to your television. Connect the open end of the HDMI cord to the back of the TV. If you have multiple connections for HDMI cords on the back of your HDTV, use the one that says Output.

Lastly, plug the power cord for the wireless cable receiver box into the wall and power it on.

Setting Up the Wireless Cable TV Box

The first step to setting up your wireless cable TV box is to turn on your HDTV and navigate to the Menu. Next, find the System option. Here you'll find lots of options, select the option that says Video Input. If you don't see that option on your TV, select Video then Video Input.

Scroll to HDMI and select the one that's highlighted. The receiver's connection is here. Now your television should be on the HDMI channel. Exit the menu.

Use the Source button on the transmitter to select the HDMI option. You may have to press it a few times before reaching this option. Next, press the Channel button until you get to Channel 1. Repeat this last step on the receiver box as well. That's it.

At this stage you can use your cable TV remote to switch between channels and options as you normally would.

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