Showing posts with label naijasat1 lectures. Show all posts
Showing posts with label naijasat1 lectures. Show all posts

Saturday, December 3, 2016

How to track mesh















HOW TO SET UP A MOTORISED SATELLITE DISH
Suitable mounting pole (2″ aluminium or steel scaffold pole)
TK brackets or and L-Bar for mounting a dish to a wall
U-Bolts
Spirit Level
Drill, F-Connectors, spanners, hammer
Compass & Satellite signal meter
POSITIONING YOUR DISH
——————-
Please bear in mind that the dish needs to be far enough away from the wall and any other obstacles so that the dish rotates freely. We normally mount the pole using TK brackets or an L-Bar which extend out from the wall by 18 inches.
You need to be able to rotate the dish between at least 30 degrees east and 30 degrees west of due south, without obstructions such as trees in the way. The furthest point you normally go to the east is the same direction as a sky minidish (28.2 east), you need to be able to rotate the dish by 60 degrees to the west from this point. Standing behind the dish, the west is to the right of a mini-dish.
If you can get a clean arc as far as 45 degrees east and 45 degrees west then there are a few more interesting satellites you can receive.
A good rule of thumb regarding obstructions – if the distance to the obstruction is twice the height of the obstruction you will have no problems. For instance if there is a fence that is 4 feet higher than the base of the dish, and the fence is 8 feet away then that will be OK.
SETTING UP THE MOUNT
——————–
The first step to setting up a motorised satellite dish is the most important one! The mounting pole that the dish and motor will be fixed to must be exactly vertical!! This point can not be over stressed. If the dish is mounted on an aluminum tube which is one metre long, and the pole is out of true by as little as one centimetre top to bottom, that is enough to stop the dish tracking properly.
So step one – Get the mounting pole 100% plumb. Use a spirit level to check this side-to-side and front-to-back.
SETTING UP THE MOTOR AND DISH
—————————–
Using Thor 1 degree as reference point, firstly you need to know your areas
latitude and the elevation angle of the dish for the Thor satellite on 1 degree west. This can be done by checking the website below
http://www.dishpointer.com/
You need to correctly set the elevation on your dish motor. Most motors are marked with a graduated scale called “Latitude” However some are marked “Elevation”
If your motor is marked Latitude, then you set the scale to equal the latitude of you location. For example Liverpool is 53.5 degrees North – so set the Latitude on the motor to 53.
If the motor scale is marked “Elevation” then the correct formula to use is Elevation = 90 minus Latitude. For Liverpool 90 – 53 = 37.
Having done that, fasten up the bolts on the side of the motor as tight as possible (without breaking them of course!)
Now you attach the dish to the motor. The motor shaft has a center line marked on it, and you centre the dish mounting bracket on this line. If you can not see the centre line with the dish attached, take a length of insulating tape or similar, and use it to extent the centering line so you can see it. Tighten the dish down so it can not move side-to-side.
Now attach the dish and motor assembly to the mounting pole, and tighten down the motor bracket, leave it a little slack so you can trotate the entire motor/dish assembly in the pole.
INITIAL ALIGNMENT OF THE DISH
—————–
The first thing you need to do is align the dish to the satellite nearest to due south. This satellite in the UK is Thor/Intelsat707 at 1 degree West. Using ProgDVB, load up the channels list for Thor. Open the channels list and click on the channel “Business TV”. This is a FTA channel that always carries a test screen with a picture of s clock or compass and the marking 1 West.
Using the dixie plug in, drive the motor to position 0.0 (fixed) the drive the Motor to Thor 1 West
Now rotate the entire motor/dish assembly to locate this satellite. This is easiest if you use a signal strength meter, or at the very least get your PC outdoors (dry weather only!) and in a position where you can see it! ProgDVB has a signal strength read out on the bottom bar of the TV picture window.
When you locate this satellite, adjust the elevation on the dish (NOT THE MOTOR!!) to get the strongest signal. For your guidance, Thor is elevated a few degrees higher than Astra. Once you have the strongest signal, lock the dish elevation so it can not move.
Now load the channel list for Astra, and using dixie plugin, drive the motor to Astra. Astra is a powerful satellite and you should have no problems finding a picture.
Go back to your dish, and using the spirit level double check that the mounting pole is still vertical and has not moved under the weight of the dish, otherwise this problem needs to be corrected before continuing.
Now load the channel list for Hispasat, and using dixie drive the motor to Hispasat. Hispasat is a considerably weaker than Astra. You Should choose one of the Strong channels to test – The FTA channel called “Programaceo” is a good one to use, or also Disney channel. Also we have noticed that motors tend to “overshoot” a little when moving to Hispasat, you may need to tap the EAST button a couple of times to manually drive the dish slightly back to get a good signal. If you can’t seem to find a signal on Hispsat at the moment then don’t worry about that just now (time for worry comes later hehehe!!)
Now go and check again that the mounting pole has remained vertical and not moved under the weight of the dish, otherwise this problem needs to be corrected before continuing.
Now drive the dish back to 1 West (Thor)
TRACKING THE DISH
—————–
*START*
First check that you have the strongest possible signal on Thor (Business TV). Do this by grabbing hold of the top and bottom of the dish and gently flexing this dish upward and downward. You should get a worsening signal as you move the dish up – down – left – or right. If this is not he case then loosen the motor brackets and realign the motor position left right. loosen the dish elevation nuts and alter the dish up and down until you have the best possible signal. when flexing the dish you are not trying to get the strongest signal, just flex it enough to check if the signal gets better or worse in each direction.
Now drive the dish to Sirius 5 East. Load up the channels list for Sirius and choose “NOVY Canal” You should get a strong signal from this channel – around 90%. Then choose one of the weak transponders on Sirius (Viasat Ticket) These channels are very weak in the UK – even in clear weather conditions on a 1 metre dish you will not get more than about 55% signal on a perfectly aligned dish.
While on Viasat Ticket, flex the dish up and down slightly to see which gives the best signal strength. Make a note of which direction improves the signal UP or DOWN. You can also try manually driving the dish slightly further east or west with the EAST WEST buttons.
Now go back to Hispasat. Choose “Programaceo” Channel. If you are getting little or no signal flex the dish slightly up or down to see which direction gives better signal. Remember that the dish tends to move slightly too far west on Hispasat so you may need to manually drive it slightly back to the east. Again make a note of which gives better signal UP or DOWN.
If you have a good signal on Hispasat “Programaceo” of say 75% or more – try one of the weaker channels such as “P-Cinema”. These channels are again much weaker than others on Hispasat – a well aligned dish gives you around 65-70% signal. Once again flex the dish up and down to wee which direction gives best signal.
If you can’t find Hispasat AT ALL then move your dish to 8 or 15 degrees west and repeat the above process to see which is better reception UP or DOWN and make a note.
Now drive the dish back again to Thor 1W “Business TV” and check that it is still perfectly aligned and all this “flexing” has not changed the dish elevation. Realign if necessary.
Now one of 5 possible situations will have occurred. These will be dealt with below. And if you need to adjust the alignment of you dish then remember the next line!
IMPORTANT – ONLY EVER ADJUST THE DISH/MOTOR WHILE YOU ARE ON THOR 1 WEST
Situation 1. Dish gives better signal when flexed upwards on both Sirius Ticket and Hispasat P Cinema – in this case you need to DECREASE the elevation of the motor and INCREASE the elevation of the dish to compensate. Realign for strongest signal on Business TV then go to *START*
Situation 2. Dish gives better signal when flexed downwards on both Sirius Ticket and Hispasat P Cinema – in this case you need to INCREASE the elevation of the motor and DECREASE the elevation of the dish to compensate. Realign for strongest signal on Business TV then go to *START*
Note Situations 1 and 2 should never arise if you correctly set the motor elevation to your latitude (eg Liverpool – 53 degrees)!!
Situation 3. (The most common one!!) Dish gives better signal when flexed DOWNWARDS on Sirius Ticket and UPWARDS on Hispasat P Cinema – in this case you need to loosen and rotate the MOTOR a few degrees to the West (Towards HISPASAT) and then tighten up the motor, loosen the dish and rotate the dish back towards the East to compensate. Reallign for strongest signal on Business TV then go to *START*
Situation 4. Dish gives better signal when flexed UPWARDS on Sirius Ticket and DOWNWARDS on Hispasat P Cinema – in this case you need to loosen and rotate the MOTOR a few degrees to the east (Towards SIRIUS) and then tighten up the motor, loosen the dish and rotate the dish back towards the West to compensate. Realign for strongest signal on Business TV then go to *START*
5. Well Done! You get perfect alignment on all three points!! No further adjustment required
by using two very weak signals on Hispasat and Sirius you can get a perfect alignment of your dish – all other satellites are more powerful and you will have no problem with thes

Sunday, October 30, 2016

MULTI BEAM DISH






A satellite dish can receive signals from multiple satellites by using one LNB for each satellite. This configuration has advantages and disadvantages. The main advantage over a motorized dish is that you can change channels quickly, but the non-center LNBs will receive lower quality signal.
The multiple LNB bracket must keep a constant focal distance and must follow the inverted reflection ofClarke orbit. The focal distance depends on antenna and orbit reflection depends on location. The distance between LNBs is proportional with dish diameter. Later I will show how these parameters affect the LNB bracket shape and size.
But now, let’s see what kind of brackets you can build and how will you attach a LNB to them.
The two types oh holders you can build
The first type (upper) uses a metal sheet bent as an arc shape and it sits vertically with the LNBs attached as shown. The second type is an arc shape trimmed sheet that sits horizontally. I would recommend this second type because it is easier to adjust. You can make the bracket from 1 – 2 mm thick aluminium sheet or 0.5 – 1 mm stainless steel.
If you choose the horizontal type, the parameter you take into account for cutting the metal sheet is the focal distance (this is what makes it easy to build for various satellite positions). For the second type, you must follow the orbit projection.
Focal distance
The holder must keep a constant focal distance for the side LNBs. The focal distance is a dish parameter that you should know from its specifications. If you don’t, you can measure it. It is the distance from the point on the dish where the LNB “looks at” and the original LNB holder. The best way to measure it is to insert a 4 cm diameter PVC pipe through the LNB holder and see where it “points to”. Then measure its length. No matter what kind of dish you have, the pipe should point to the horizontal center (in the middle of the horizontal width of dish measured at the current point).
How to measure the focal distance of an offset dish
Now, that you know the focal distance you can make a template for your bracket. You must draw an arc with a radius equal to the focal distance. You can do this with an inextensible wire and a pencil by holding one end of the wire still on the table and drawing with the pen while tied by the wire. Or you can use a drawing software and print the result.
Inkscape example
Inkscape can be used. Draw three circles: one with the focal distance radius and the other ones with a radius smaller by 1 cm and greater by 1 cm. Align the circles in order to “catch” an arc on the page then print it. This is the template for a horizontal type bracket, but can be used for vertical type too, if you bend your piece following the circle (arc) of interest.
The holder should be equally spaced with regard to the center of the dish.
The bracket should have a width of 2 cm and a length of 40 cm to have enough to play with. It’s up to you how you attach it to the dish arm, but keep in mind that you must take into account each LNB holder (I will detail later how you can build those).
Orbit
In the vertical plane, the bracket should be a small scale representation of the Geostationary orbit. This differs depending on what satellite positions you want to receive and what is your location longitude. If you plan to receive satellites that are situated both western and eastern with regard to your longitude, the bracket must be bent in “U” shape. For the other cases it can be straight and placed oblique as it will be shown below. Imagine you sit behind the dish and look at the following drawing.
Multifeed configurations as seen from behind the dish
Let’s take some practical examples:
You live at 15 E and you want to receive 13 E, 5 E and 1 W. All these are western satellites with respect to chosen location. The highest satellite (13 E and 16 E can be considered as such here) is at the edge of the holder. No matter what will be the center LNB (although it is recommended to be on 5 E), you’re in situation B.
You live at 15 E and want to receive 19 E, 13 E and 5 E. If the center LNB is on 13 E, you’re in situation A. If center is on 19 E, you’re in situation E. Otherwise, if center is on 5 E, you’re in situation D.
You live at 35 E and want to receive 45 E and 52 E. Both are eastern satellites. You’re in situation C.
Situations A, D and E require a bent bracket, in two planes. If you built the vertical one, now you can’t do anything. This is why I recommended the horizontal piece bracket.
The inclination angle of the bracket increases (goes towards vertical) as you approach equator. If you live at equator, the LNB holder is vertical, meaning you can only add LNBs over the top of the central one (with an offset dish).
An useful tool for this is the calculator software SatHunter. Note that it is shareware and you only have 10 tries to calculate your multifeed. Don’t forget to set your location correctly.
SatHunter location settings
Then set your focal length and choose the satellites of interest. Note that as opposed to what I have described, this software shows you the front of the dish!
Multifeed calculator
If you prefer to make the calculations yourself, pick two satellites you want to receive and write down their azimuth and elevation (use DishPointer). The formula is this:
where is the focal distance and if then is the horizontal distance between LNBs and if then is the vertical distance between LNBs.
LNB attaching
You must attach LNBs to your homemade bracket. Here is what I suggest. You can make these holders from metal sheets with a thickness of 0.5 … 1 mm.
How to attach LNB to the holder
But where on the bracket do you attach them? The best way is trial and error. Connect the LNB to the receiver (via a DiSEqC switch). Note that the antenna should be pointed to a satellite (as good as possible) with the central LNB and the bracket mounted! Now take the second LNB and move it with your hand across the bracket until you get the best signal. If you built the horizontal type bracket, slightly bend it up and down to improve signal quality. When you’re satisfied, mark the bracket and drill the required holes to fix the LNB.
And one last thing, the holder can stand below the LNB as shown, or on top of them, which is actually better if your holder is “U” shaped (situation A).

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Friday, September 23, 2016

naijasat1 lectures

naijasat1 lectures

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Watch 200 channels using a single 90 cm
dish to track five (5) different satellites
with four (4) lnbs;
I want to share with Century Sat family and
visitors on how you can successfully track 5
different satellites with a single 90cm dish and four
different lnbs. The dish above belong to me. I was
able to track 6 different satellites with it, using four
lnbs. The procedures is this : 1. Get 90 cm dish size ( preferably)
2. Fix your dish and get ready to track.
3. Pick up one lnb and connect it and track Eutelsat
16 @ 16 degree East as primary using frequency
10804 H 30000. Make sure you increase your
signal to at least 70% and blindscan to get your channels.
4. Fix second lnbs and place it on top of your
primary lnb to track Multi TV. The distance from
Eutelsat 16 and Multi TV is little bit far ( 16 degree
East to 28.2 degree East). Use this frequency for
Multi TV, 12525 V 30000. When you search gently above Eutelsat 16, you will find Multi TV signal
there. Look for a rope or a piece of tube to tie your
lnb or better still you can get lnb hanger in the
market. When you successfully hit green, then
blindscan to get your channels. If you track it very
well or your dish is in a good location, Badr 5 @ 26 degree East channels will automatically fall in Multi
TV.
5. Pick up third lnb and place it above Multi TV to
track Eutelsat 4/7 @ 36 degree East using
frequency 12035 V 27512, 11939 H 27500.
Eutelsat 4/7 @ 36 degree East is close to Multi TV, just move your lnb above Multi TV and you will hit
green. When you successfully hit green, simply
blindscan your receiver to get your channels.
6. Finally, pick up 4th lnb and place it under the lnb
you started from, which is the first lnb ( Eutelsat 16
@ 16 degree East). You need to come down a bit to get SES 5 signal. ( Eutelsat 16 @ 16 degree East to
SES 5 @ 5 degree East) . You can see the distance.
As I said search for SES 5 signal under the first lnb
you started from, which is Eutelsat 16. Use this
frequency , SES 5 @ 5 degree East with frequency
11919 H 27500, 12015 V 29950, 11996 H 27500. When you get the signal, then blindscan to get
your channels. Note: If you position your lnb very
well with a high signal, Eutelsat 7@ 7 degree East
channels will fall in automatically, making it 6
satellites with 90 cm dish. Please, try to increase
your signal as much as possible as you can achieve. Try to look at the picture above, it will help
you to achieve that. Notable channels on these
position include:
1. NHK World
2. Russia Today ( RT)
3. DW TV HD/Mpeg 4 4. DW TV Mpeg 2
5. ECN ( DW TV)
6. France 24 English
7. France 24 Francis
8. MNBC
9. CCTV News 10. CCTV 4.
11. CCTV Francis
12. CCTV Documentary
13. African24
14. Africa News
15. TVC News 16. TVC News Nigeria
17. Core TV
18. Liberty TV
19. Joy News
20. Joy prime
21. Max TV 22. Thunder TV
23. Trust TV
24. Metro TV
25. Kessben TV
26. ZTV
27. GHone 28. Cine plus
29. African Movie Net
30. Rave TV
31. Galaxy TV
32. Green TV
33. Aforevo TV 34. TVC Entertainment
36. Event TV
37. Lifestyle Africa
38. New world Cinema
39. TV3
40. MG TV 41. Canal English
42. ESpace TV
43. BTN
44. TIVI 5 Monde
45. Macro View
46. Canal International 47. African Health TV
48. Taurauwa TV
49. Rayuwa TV
50. Norma TV
51. Adam TV
51.GTV 52. TV XYZ
53. Trace Africa
54. MTN- GET TV
55. Boom TV
56. TVC Benin
57. Z channel 58. New world Magazine
59. Life Africa TV
60. E Tele
61. NTV
62. ABK TV
63. Money Mart TV 64. Royal TV
65. Angel TV
66. TV Gold
67. Price TV
68. Power TV
69. Brekete TV 70. Bernie TV plus
71. TV5 Monde
72. TVM Madagascar
73. New world Sport
74. MCS
75. Stadafric 76. TV Congo
77. Vision 4
78. 2STV
79. CRTV
80. TVT Togo
81. RTG1 82. RTN Gabon
83. ORTB
84. EBC
85. Alfayda
86. Virtual Games
87. 49JA 88. Bet9JA Dog Racing
89. Bet Football
90. Subet 247
91. Subset 247 VFL
92. Ark of God TV
93. Sikka TV 94. LTM
95. DBS
96. Golfe TV
97. Vox Africa
98. Gabon News 24
99. TFM Senegal 100. STV e.t.c.