Hdtv Antenna – A Bird’s Eye View
There has been a lot of hype lately about having a Hdtv antenna. Is it just hype or should you literally get it?
First, what is the hype about having a Hdtv antenna? The hype is that with the antenna, you can watch 1080i resolution broadcasts and will get better ability than satellite Tv. The truth is going to hurt if you already have bought a Hdtv antenna. There is literally no such as a Hdtv antenna.
Hdtv
How An Antenna Works
All an antenna does is pick up frequencies. The frequencies that you pick up for your Tv are Ultra High Frequencies (Uhf) and Very High Frequencies (Vhf). All Tv broadcasts take place in the Vhf and Uhf bands. High definition can be part of these frequencies and you do not need a special Hdtv antenna to pick them up. Your regular antenna could do the job just as well.
An Hdtv antenna and a regular antenna have the same electrical and spatial properties. They must have directivity, high front-to-back (F/B) ratio and low-noise amplification when the antenna has an amplifier. If they have the same properties, why pay more to get something that is the same?
People have this perception that they need a more powerful Hdtv antenna because of directivity and amplification. This is not true. Hdtv is literally more noise immune than analog television and will be able to produce high ability video at significantly lower signal-to-noise ratios. Digital Tv needs less antenna gain and can tolerate higher noise levels. A Hdtv antenna and a regular antenna have similar directivity/gain properties so you should receive analog or digital broadcasts with the same good quality.
Ghost Images
One question that an analog antenna and a Hdtv antenna have in common is that there is all the time a opening of a “ghost” creation. To get to your antenna, the signal must take many paths to get past tall structure or other reflective structures. An antenna has to have a high F/B ratio to overcome the creation of a ghost image. There is literally more opening of getting a ghost image with a high definition Tv since it has a slightly larger bandwidth. An analog antenna could deal with this image better than a Hdtv antenna. If the ghost images that could come up with an analog antenna or a Hdtv antenna bother you, you should probably get a satellite dish. There should be no ghost image because the signal does not have to take multiple paths to get to the satellite dish. The satellite’s signal goes directly up into the sky and the signal comes back from space. There are no structure or anyone else between the satellite dish and the sky.
A satellite dish can also supply more channels than an analog antenna or a Hdtv antenna can provide. All the channels will all come in crisp and clear with no opening of a ghost image.
If an analog antenna or a Hdtv antenna cannot supply you with the Tv image that you want, you might as well go with a satellite dish and that is the truth, not hype.
Hdtv Antenna – A Bird’s Eye View
Recommend : DaveClark Headsets Laser Range Finder
Did you enjoy this post? Why not leave a comment below and continue the conversation, or subscribe to my feed and get articles like this delivered automatically to your feed reader.
Comments
No comments yet.
Leave a comment