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Hdtv signals can arrive at your home straight through a amount of broadcast mediums:
Over the air straight through an antenna you setup in your or on your home Cable service in Case,granted by a line off the electrical pole or similar location Satellite Broadcast straight through a satellite antenna on or near your home.
For Hdtv digital broadcasting, a schedule is first recorded at the source in the Hd format using Hd-formatted cameras and equipment. This Hd signal is then broadcast over the air and simultaneously captured and re-broadcast by service providers such as cable and satellite services.
In order for your television to receive, decode, format and display the signal, you must have an Hdtv-compatible Tv. What is that? An Hdtv television is a Monitor that can provide the proper display of the Hdtv signal. It must have an Hdtv-capable tuner or receiver to decode the digital signal. That is it. Your Hdtv is ready. Sit back and enjoy.
Well, not quite. Some Hdtv sets are naturally a Monitor just like the one attached to your personal Computer. It is naturally a disply - it does not have the capability to decode and format the signal to display. These will be listed as a Hdtv Monitor or Hdtv "ready". This is fine if you are going to provide an Hdtv formatted signal from other expedient such as a cable or satellite tuner box or Dvd/Hdtv Dvd player. I do not propose this as the prices and availability of Hdtv sets with receivers built in are becoming coarse place and very competitively prices with the monitor-only units.
Antenna, Digital Cable or Satellite?
The biggest advantage of going with broadcast via home antenna is that you programming is free of monthly charges. You will even note that each local broadcast channel has additional digital programming for you to view. For example, if you received the analog Channel 5 in the past, you will get Channel 5-1 digitally. But you will also note that most channels offer additional channels. Channel 5-2, 5-3 will also be ready with more to come in the time to come (based entirely on each stations schedule.
The drawback is the dinky amount of channels and choice available. Not only that, but if you are not able to receive the broadcast channels clearly, you may have to achieve some 'antenna gymnastics' to be able to receive and watch some or all local channels.
Satellite
For satellite reception, the former drawback is 'rain-fade'. A close used to be the actual premise but for most providers, they will provide the premise service as part of your signup package.
If you choose to go with satellite option, you must be able to expose the antenna so that it has a southern 'line-of-sight' to the satellite. Sometimes, the beam from the satellite is blocked by terrain, a tree or building for example. Before you opt for satellite, it is very advisable to visit to check first by contacting the satellite supplier for your location.
Rain fade is caused by the attenuation (reduction of received signal strength) caused by large rain clouds and the rain drops as they fall. This causes a reception disruption as long as the heavy rain is placed in the middle of your antenna and the satellite. These are normally short interruptions but can be very frustrating, especially if it occurs while your popular show or sporting event and must be carefully if you live in an area where there are frequent heavy rains or storms
Cable
Cable is similar to satellite in that it you pay for monthly subscription to give you way to a huge amount of broadcast channels.
The drawback to cable is outages caused by down cable lines. This can happen in your front yard (from falling tree limbs for example) or some miles away due to damage from the electrical pole on which the cable is installed or electrical storm surge/strikes nearby. This does not happen often but oftentimes sufficient to be a concern when deciding on which way you want to go.
As for my family, we have satellite. But we also have a quarterly broadcast antenna in our attic that will provide Hdtv signals to us in the event of rain outage so that we can closely monitor storms or risky weather (the exact type weather that will interrupt our satellite reception!) It is ideal to have a backup antenna for just such event, regardless of either you choose satellite or cable.)
Next in Part 4, I will discuss the basic discrepancy in the middle of the old analog theory and today's digital broadcast plus dispel some myths versus facts.
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