One of the most common reasons for needing a cable TV signal amplifier would be that you are using a digital TV signal and the content bears too much to handle on its own. Think of it as if it were dial up internet and you wanted faster speed. You would need something else in between.
A TV distribution amplifier is used to distribute television signals, such as cable TV signals, to several TVs, without losing power or signal coherency. Many for indoor use resemble simple signal splitters, but actually amplify the signal where needed before passing it on.
A biderectional cable amplifier with a bypass is excellent for use with digital TV, because it amplifies the return signal. Using a unidirectional cable amplifier can result in some channels that do not work because the return signal is not amplified.
For the best possible signal, a TV amplifier should be placed as close to the antenna as possible, ideally within a few feet. This minimizes the loss of signal strength that can occur over long cable runs. If you're using a coaxial cable from the antenna to the amplifier, ensure the connections are secure and that the amplifier is powered if it's an active model. Additionally, avoid placing the amplifier near electronic devices that could cause interference.
Most likely it's because the satellite amplifier doen't have the bandwidth or frequency range to cover the DTV signal.
The signal will move down the cable at from about 1/3 the speed of light to about 9/10 the speed of light, depending on the type of cable used. If there is a booster amplifier in the cable between the antenna and the TV set this will add more delay. You will need to know the length and types of cable used (and look up their signal propagation speed) as well as the delay of your booster amplifier if your system has one to calculate the answer to your question.
it extracts the video signal amplify it & sends it to picture tube for display.
TV amplifiers can be purchased at many electronics stores. Best Buy, Fry's Electronics, Radio Shack, Amazon, and Staples all have this product for sale.
Try rescanning the set. Did the antenna get turned to a wrong direction?
an RCA splitter can be purchased at your local TV store or music store. If you want to drive several TV's with one signal, you will need a video distribution amplifier, available at electronic stores and sites like Monoprice.
There are many things that cause the snow effect on the TV such as a loss of signal or electromagnetic interference. These things can usually be resolved by adjusting cords or cables on the TV.
There are three ways that PC sound can be routed through a separate audio system. The first method is to simply take an analog audio output from the computer and feed it to the stereo system. Normally, a 1/8" jack to RCA lead will suffice. The next is to use a multimedia amplifier and feed the HDMI signal into the amplifier before it goes to the television. The amplifier can extract the audio signal before passing the video signal on to the television. Both of these solutions have a potential problem. HDMI is a digitally encoded signal and decoding it for display takes time. By extracting the sound from the signal or using an analog source, the delays inherent in displaying an image are not followed by the sound. Therefore, the sound can be heard before the picture. Depending on the way the signal is handled throughout the signal path, this may be disturbing. Sometimes, the delay may not be noticeable but it's a matter of trying it to find out. The third method is to take the sound signal from the television itself and route it to the amplifier. Some televisions have RCA jacks (called phono connectors in Europe) or a 1/8" headphone jack. The output from either of these will always be timed with the vision and delays are then not noticed. The best method depends entirely on the set up of the whole system but be prepared to experiment to get the best results.