With nowadays technology, the price of satellite receiver is down the earth price. Many makes of low-end receivers has surpassed the value you are paying.
The digital receiver, in fact, is a specialized computer with built in
The high-end receiver called PVR, personal video recorder has built in hard drive can allow you record and playback later.
Our experience found that different makes of receivers has different quality. Below are some tips to select your receiver.
The larger the dish, the stronger is the signal you could receive, that is, the less intermittent is the picture. However, the risk of wind disturbance, cost, and space is proportionally higher. There are two bands of microwave signal normally used for TV. C band is the older generation; it requires a huge dish. Ku band is the modern generation, requires a smaller dish. Many pay TV provide you strong signal by aiming at a smaller coverage area, such that a smaller fixed position dish is good enough. For FTA signal, because of broadcaster is aiming at larger coverage area, so you must use a bigger dish than those pay TV. You might found that not all stations on the same satellite are equal. Different transponder on same satellite can give different signal quality. It is very depending on how much power that transponder is transmitting and which coverage area it is pointing to. Satellite is using solar energy. Power is precious in space.
Depending on how far you are away from the equator. We recommend 39” or 100cm dishes. This is the biggest dish size, which can be driven by a standard sized rotor. For northern or southern territory, you might need even bigger dish.
The actual size of the dish is very often exaggerated. Many dishes are oval shaped. The dimension given is based on the longest measurement. A round dish with same size rating of oval shape dish has more area. Some manufacturers use the curvature as measurement. The size claim could be boasted by three inches. We found that every 3 inches increment gives significant improvement on performance. Same size dishes made by different manufacturer can give observable differences on reception because of the real size is different. Do not trust the dimension claimed by manufacturer. You must compare it with your own measurement.
The atmosphere can attenuate
signal. The shortest route of air traveled is directly under the equator. When
you are away from the equator, the signal has to travel a thicker air. When the
satellite is located at the same longitude with you, it has the shortest air
path to your site. When you point your dish to another satellite, which is
further away from your longitude, your air path is longer. The signal
attenuation is proportional to the air path. Cloud, rain, and snow can weaken
your signal. Wind can cause temporary off alignment of dish. The dish is never
too big. You could receive the signal well on new installation. Your dish could
be off aligning after some severe weather. This is especially troublesome on
small dish because it is touchy on alignment. Our experience shows that weather
is not a major factor of poor reception. Dish size plays a more important role.
Besides the dish, you need a good
rotor if you want to receive multiple satellites, unless you want to install
several dishes. Some rotor has a weak motor. You might have to push it to get
moving. USALS compliance is a good feature to select. Theoretically is supposed to use two motors to control the dish. One
motor rotate horizontally, and the other vertically. Since the vertical rotation
always follows a fixed geometrical pattern. By using a tilted shaft rotor, we
can eliminate the vertical motor.
All geostationary satellites were installed at a high altitude of 35,800Km above the equator. On northern hemisphere, we must point the dish toward south ±70°. On southern hemisphere, it is just the opposite way. At equator, you have to point the dish upward. At northern or southern hemisphere, depending how far you are away from the equator, you have to point the dish at an elevation angle.
Before installation, you have to find out the longitude and latitude of the installation site. Below website could help you to locate your co-ordinates. http://www.multimap.com/map/home.cgi?client=public&overviewmap=ap. You could also use a GPS.
On the chart http://www.lyngsat.com,
find a satellite, which is closest to your longitude as reference to true south.
For example, if you are at 79.6 °W
longitude. The closest satellite is AMC-5 at 79°W.
From the calculator below http://www.ses-americom.com/tools/lookangle/index.html,
enter the data and calculate your azimuth and elevation. In this case, the
azimuth calculated is 179.1°W,
and elevation is 39.7°. If the
satellite has the same longitude of your site, then, your azimuth should be 180°W,
that is the true south.
Select a rigid sport which has a clear vision to south ±70°, with the height as high as possible. No trees or objects in front.
Most rooftop is using very thin wood; your dish could off align or even blow
away if not properly reinforced. You can use concrete patio slab as support.
Blowing wind on