With a small device connected to your television’s USB port, you can scan for new TV channels by entering specific criteria into the device’s web browser. If you are connecting a high-definition DVR or an HDTV to your TV set, you can use a software CD or a downloadable video player to do the job. However, if you have a traditional TV set, you will need an antenna to receive the digital signal and a TV tuner to decode the signal.I strongly suggest you to visit more info here
If you do not have an HDTV, you might want to scan for new channels using a lNB type TV Tuner. If you have an analog TV tuner and wish to upgrade to a digital signal, then this is a cheaper alternative to a satellite antenna. The only difference with a lNB type tuner is that it does not need an antenna. It works by scanning all channels in the market for a particular program and playing them on its internal TV tuner. It has been designed specifically for the absence of an antenna, so it is ideal for people living in apartments or have a low view angle.
If you prefer to use an antenna, then you should try getting a set-top box. This is similar to a satellite receiver – the only difference is that the set-top box does not need an external antenna. In order to receive a signal, it scans channels and shows them on its display. A stand alone unit is best for people who have a large area to scan because it can scan hundreds of channels at once, whereas a satellite receiver requires connection to several satellites in order to deliver programs to a single receiver.