Tracking. Sat is useful to assist users that need to install your antenna and align it with the satellites in orbit. This guide shows you in an easy- to- follow approach, how to select your dish, choose the best location, install, and eventually fine tune your satellite antenna for the best reception. This consists of the satellite dish and related mounting kit, high- grade RF coaxial cable, and the satellite TV receiver, or decoder. LNB's/LNBF are low noise 'block' down- converters. An LNBF is an LNB with an integrated feedhorn. Most LNB's in use today are actually LNBF's.
The term 'low noise' relates to the quality of the amplification and mixing that takes place inside the LNB. Their purpose is to receive, amplify and down convert the required 'blocks' of microwave frequencies to lower 9. MHz to 1. 4. 5GHz L- band frequency signals; these are then sent to the satellite TV receiver or IRD (integrated receiver decoder), via RG- 6 coax cable.
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Satellite TV service providers use multiple satellites to deliver their content - implying that multiple LNBs are required to receive all television programming supported by a satellite TV service provider. The probe has to be aligned mechanically in a vertical or horizontal direction (or left and right hand circular polarization for DBS satellites) in line with the polarization of the signal transmitted by the satellite transponders. This dual polarization is used by satellites to avoid interference between adjacent channels, and is achieved by assigning even and odd transponders on the satellite, different polarization. Switching to the correct polarized probe is carried out electronically via a voltage sent up the coaxial cable by the receiver.
It is particularly important if you are installing a feedhorn that receives Ku- Band signals. In order to find the correct focal distance for tracking, the feedhorn must be at the correct distance from the center of the dish, properly oriented, centered and perpendicular to the plane of the antenna. Follow the alignment procedure outlined below. Set the scalar ring adjustment for the f/D ratio that is called for in the antenna specifications. If you do not know the f/D ratio, you can calculate the focal distance and f/D ratio yourself using a formula.
The polar axis is a line that runs through the center of the dish pivot points. It is the axis around which the dish will rotate. Another way to look at it is ... If your dish is positioned so that it is pointing at it's highest point of travel (the zenith of the arc)...
How to Install Dish Network Satellite TV Indoors. If you aren't permitted to place your Dish Network satellite dish on a wall outside your apartment. A satellite installation kit is useful when setting up your dish.
Proper orientation in these terms means that you point the arrow of the polar axis template at 1. If you do not have a template, you can get close by siting down the long side of the servo motor; pointing it at about 1. This can be done by measuring from the feedhorn to at least 3 different points around the rim of the dish (i. The 3 measurements should be equal. Use the adjustments in the feed support legs (or guy wires if you have a buttonhook support) to make any necessary adjustments. The easiest way to check this is to use an inclinometer or universal protractor. Check the angle at the center of the dish and across the throat of the feedhorn; the measurements should be the same.
When dealing with most prime focus antennas, the number should come out between . If you notice, most of those numbers are also on scale on the side of the feedhorn. You simply set the top edge of the scalar ring even with the line that corresponds to your correct f/D setting. If the dish is very deep(example: 1. When that is the case, the focal distance is often only a few inches greater than the depth of the dish. Therefore, the feed needs to be able to .
In that case, the feed would need to have an narrower field of view so it would . Measurements should be in like units (you can't use feet for the diameter and inches for depth). For the example, we will say we have a dish that is 1. D) and 1. 8 inches deep (d). In this case, using the same diameter (D) = 1. D = 5. 0 / 1. 20 = . D = . 4. 16 which you would round up to give you a setting of .
The list below shows how far the throat is out from the scalar rings for different f/D settings. They are usually indicated by the fact that every other channel is bad. You will notice that on some satellites, only the even numbered channels will come in, while on other satellites only the odd numbered channels will come in. This happens because the probe inside the feedhorn will not turn the 9. If your satellite system is several years old, the problem is most likely that the servo motor that drives the probe has failed. Here are some steps to take to find the problem. Use a volt meter to check the voltage at the back of your receiver to make sure that the voltage is coming out of your receiver.
The connector to check is usually labeled . Disconnect the wires that go to the dish and measure the +5 connector to GND. You should have approximately +5 to +6. Receivers put out a constant +5 supply, so the voltage should be there as long as the receiver is turned ON.
Other brands of receiver may only put out the +5 when the channel is being changed or when the polarity/skew is being adjusted. The pulse output is what tells the servo motor how far to turn the probe. You will read from . In most receivers, this voltage will only be present when the channel is being changed or when the polarity/skew is being adjusted. Then, go out to the dish and remove the feedhorn cover. Disconnect the 3 wires that are connected to the servo motor.
Measure to verify that you are getting the pulse and +5 voltage on each respective wire. If you are NOT getting the same voltage as you had at the receiver, then you have a wiring problem. If you are getting the same voltage, reconnect the 3 wires, proceed to step 4. If you hear the servo motor turning, but there is no apparent change in the position of the probe (remove the throat cover and look inside the throat to see the probe), remove the servo motor and pull up gently on the amber colored drive shaft that couples to the servo motor. If the shaft pulls out, you will need to send the entire feed to repair. You can usually purchase a servo motor at any satellite dealer.
But try these steps to determine if the problem is more serious. Take the servo motor off of the feedhorn and hook it up directly to the back of your receiver. You must disconnect the wires going to the dish for this test to be valid. If it turns when you change channels and does not drift or buzz when you are not changing channels, that tells you that the receiver and servo motor are working properly and the problem is likely to be noise being pick up by your unshielded pulse line. The only way to correct this problem is to make sure that the pulse line is shielded and the shield is grounded at one end.
You need to replace it. If you can't solve your polarity problem after following the instructions and tips above, we recommend calling out your local satellite dealer to troubleshoot the system further. Dishes range in size from 1. However, more than the shape or size, the real significant difference between the various types of dishes relates to the number of LNBs, and the number of supported outputs.
Some multi- switches allow you to add over- the- air broadcasts or cable feeds, and send both signals to each viewing area via a single coax cable. In this case, you will need a diplexer for each viewing area to split up the signals again. As indicated earlier on, broadcast signals from satellites are split in two different polarizations, and these are differentiated at the LNB. If signals with different polarization were sent over the cable at the same time, they would interfere with each other. The switch then has multiple outputs to receivers. A receiver connected to a multi- switch sends a switching signal back up the coax cable to enable the switch to select the correct LNB it needs to look at. If not, you will have to order a new dish.
These new dishes consist of a phase III dish with an integrated switch to handle both Ku, and Ka (9. With the slightly smaller 1. This is something that is best decided after you speak with your digital satellite TV service provider. In particular, these compact satellite dishes are especially suitable for city dwellers. The only real difficulty that may arise in the process is when aiming the dish to get the best signal from the satellites.
This is a crucial step and it is this step which may warrant professional assistance. Remember that the satellite dish is your main link to those satellites floating around in space, so it has to be aimed properly to pick up the signals. Some self- installation kits may be of assistance in this respect. There are a few issues that you need to take into account here.
Therefore, a satellite dish must point due South when your position is located north of the equator and North if you are located south of the equator. A suitable location is to attach the dish to a post which has been sunken in the ground. All are possible sources of interference.
In other words, there must be no obstructions between the dish site and the satellites in the sky. Once you determines that the location is suitable, you will have to decide on a permanent or portable installation. Unless you fell you will be relocating in the near future or you are living on rental property, a permanent installation in concrete is the better way to go. In addition, make sure that the growth of new foliage does not impede your system. Remember that system movement can reduce signal reception to the point of complete loss. Make sure it is long enough to reach both points. Attach the cable to the satellite dish and then run it across your yard and into the house through a drilled hole.
Attach the cable to your television set. Seal all outdoor electrical connections with weatherproof sealant, and bury the incoming receiving line below the frost line level.