Sunday, November 28, 2010

Digital TV Aerial Installers - Don't Choose the Wrong Company

By James Sollis


Many people who are attempting to find digital TV aerial installers have been plagued by the same questions that you may be asking yourself during your hunt to find the high-quality digital TV aerial installers that you want working on your home or business TV set. What should the installation service cost? How long will the installation take? Does my aerial system just need an upgrade or does anew aerial need to be installed altogether? By doing your research ahead of time you'll be able to locate digital TV aerial installers who can answer your questions and provide you with the aerial installation of your dreams.

I'm sure that there are many digital TV aerial installers in your area. The only problem is how do you weed out the typical contractor whose only looking to line his own pockets versus the digital TV aerial installers who do a good job, at a fair price, and look out for your best interest? Well there are several steps that you can take to help protect yourself. The first and most important simply entails asking questions of the digital TV aerial installers that you are choosing from.

And even though there are many digital TV aerial installers in your area it can sometimes be difficult trying to weed out the good installers from the bad. Many factors play into this including quality of installation, warranty and pricing. A good technique for getting at whether or not this installer is capable of doing a good job or just trying to "take you for a ride" is simply asking questions. Not only should the digital TV aerial installers be willing and able to answer the questions that you have put in the end you should also be content with the answers given. If for some reason the answer seemed odd or if you feel like you're consistently being up-sold or pushed to buy now then this should prompt you to start looking with another company.

Another great indicator of quality digital TV aerial installer is their willingness to stand by their work. Whether it is for a home installation or business installation many good digital TV aerial installers will offer some sort of warranty behind the hardware and service that they have provided. It is always reassuring to know that with a simple phone call you will have the installer back at your home and doing the needed repairs without cost to you.

At the end of the day the choice of digital TV aerial installers is one that you must make on your own but by using the hints and tips provided above not only will you be more likely to pick a high quality digital TV aerial installer but you also rest easier with the knowledge that you've done your research and homework prior to picking an quality installer.




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Friday, November 12, 2010

What Is Satellite Radio Technology?

By Owen Jones

Satellite radio technology is the equivalent of cable or satellite TV and it is definitely here to stay. There are several reasons for this: the quality of the broadcasts is higher, the quality of the apparatus's reception is higher and the general coverage of the channel, that is to say the so-called satellite's footprint is much greater as well.

This means that if you drive long distances, you will be able to stick with the same station without having to look for a new one every forty or fifty miles as you need to do with AM or FM radio channels.

In order to reach this quality, the recording and playback speed needs to be around the 384 kbps level. The music tracks are catalogued in a similar way to the MP3 system, which uses names called ID3 tags.

Each station on satellite radio endevours to create its own identity. A music station might try this by playing music only of one sort or from only one era or decade. This means that you may get a satellite radio station called 1970's Punk music or Twentieth Century Classical Music.

On some stations, the music controller or disc jockey will choose, say, fifty minutes worth of music, will listen to it in order to ascertain that the quality and the order are correct and then let the computer play it over the airwaves. This allows ten minutes every hour for the news and then the programme can be repeated automatically.

Satellite transmission uses digital recordings and each channel is encoded on a different frequency. Similarly, each decoder, say, in your car or your home has to recognize and decode each channel separately as well. This coding and decoding is done very quickly, in fact in what is called 'real time'.

The resulting binary or digital code is then turned into into analogue signals so that your speakers can reproduce it. This process produces sound which is just about of CD quality.

The broadcasting satellites are in a geo-static orbit at 23,000 miles above the Earth and have a large footprint which is the name given to the region of ground that is capable of receiving their broadcasts.

In America, for example, the two fields concentrated on at first were the densely populated east and west coasts in order to maximize possible income. One satellite would be incapable of covering the whole of the United States in that orbit.

In order to receive satellite broadcasts, you will have to use a special antenna on your decoder. This antenna must be capable of picking up L-band transmissions for it to be of use.

These new antennas are a big improvement on the satellite dishes (similar to those used for satellite TV) that one used to have to have in order to take advantage of satellite radio technology

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Friday, November 5, 2010

Just What Is Satellite Radio?

By Owen Jones

Satellite radio has in fact been around for quite some time, but it was inaccessible to many people because the stations that were broadcasting were fairly unknown, the equipment was costly and the antennas, normally in the form of dishes were highly directional, which meant you needed to use expensive, experienced installers.

For proof of this you should look no further than bookmakers and betting shops who had specialized satellite broadcasts beamed to their establishments with the results of the races live.

The difference now is in cost and the power of the satellite radio transmission units as well as the receivers. In other words, satellite radio technology has advanced a long way since the Eighties. Satellite radio can also be received more easily these days, although the reception of satellite TV broadcasts still necessitates a directional receiving dish. This is why satellite TV cannot be received well on a boat or in a car, but you can still get satellite radio and you can still use your mobile phone.

Satellite radio broadcasts are digital so most of the benefits of using it are associated with digital technology. Some of these are: the ability to pick up signals from all around the wold through the satellite network and the lack off interference - that annoying hiss that you frequently could hear at night while listening to a distant broadcast. Reception is now consistently crystal clear due to the uncomplicated means that is digital - on and off or high and low.

Digital only makes use of two signals so they are not possible to mix up, whereas analogue needed millions of them allowing for mistakes due to bad weather or / and bad equipment. That has been largely eradicated.

The state of affairs in the US is that there is still competition between two contrasting systems: XM and Sirius and it is to be hoped that this situation will soon be resolved as it was thirty years ago between VHS and Betamax, because otherwise it will only be the public who lose out in the end - the clients of the firm that goes bankrupt.

There were initially problems with satellite radio in some areas because natural or man-made structures would block the line of sight from the antenna or dish to the satellite causing a break in transmission. Typical causes for this would be tunnels, mountains and sky scrapers.

However, the satellite radio service providers soon came up with a solution to the problem by bouncing the signal from the airborne satellite off terrestrial dishes, in other words, reflecting them at closer to ground level, thereby providing satellite radio to millions of inner city dwellers.

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