اموزش:lnb

Tekniska data Andrew 370 cm parabol
Parabolen är tillverkad i två halvor. Fokalavstånd 1225mm. Fd 0.33
Gain 50.5 dbi vid 11325 Ghz. Har en öppningsvinkel på 1.15 grader.
Med den här stora parabolen ca 2000 analoga och digitala TV kanaler.
180 cm - 370 cm paraboler.
180 cm parabol
370 cm parabol är styrd med två
motorer för att få max signal.

بنام خدا
در ابتدا با ال انبي پرميوم ايكس شروع كرديم.
در مدل پرميوم 2 ان را كاملتر كرديم.
در سري گذشته ال ان بي ها بخصوص مدل پرميوم 2 موفقيت كاملي داشتيم.
اما باز اين ال ان بي جواب بعضي از دوستان نبود.
پس تصميم بر اين گرفتيم كه با طراحي و پيشرفت جديد محصول بهتري داشته باشيم.
PREMIUM HD محصول سال 2007 ما مي باشد كه طراحي ان بيش از 1 سال و نيم طول كشيد.
و با تست ان با ابزارهاي پيشرفته و همچنين با تست نمونه هاي اين ال ان بي در ايران ،
محصول تكميلي پرميوم اچ دي ساخته شد.
اين ال ان بي با داشتن فيدهورن مخصوص و اندازه بزرگتر خود طوري طراحي گرديده كه نويزهاي اضافي را تا حد زيادي ميگيرد .
افزايش تعداد لايه هاي دروني نقش بسزايي در تقويت سيگنال دارد .
همچنين بسته بندي مخصوص و استفاده از ليزر د ر چاپ و بسته بندي جلوه خاصي به اين ال ان بي داده است.
در تصاوير زير اختلاف ان را با سري قبلي و مراحل پيشرفت و مقايسه ان با چند ال ان بي را مي بينيد.

PREMIUM 2 PREMIUM HD

نسبت به ال ان بي قبلي بزرگتر و درازتر مي باشد.

Uwaga: Kliknięcie na obrazek, otwiera nowy obrazek, z większą liczbą szczegółów.

rys. 1
Kierunek boczny Hispasata, (22.07), godz. ~10:40
Kierunek "azymut Hispa - 90st" to "51W - 90st = 39E"
Kierunki można wyznaczać wg położenia słońca,
kątomierzem(cyrolex 3zł). Trochę trudniej kompasem. rys. 2
Kierunek na Hispasata, (22 lip.) godz. ~15:20
dla Szczecina. Azym.=51W.
Linia zielona wskazuje Eutelsat 36E, azymut 26st.E
Tak obracamy ekierką w osi X i Y, żeby cień był
najwęższy.

rys. 3
Jak widać pochylenie tej anteny jest znacznie
mniejsze niż dla anteny Wizji 60cm:
http://www.ksw-funcard.civ.pl/sat/sat_30w.htm
Pochylenie może być inne, ale różnica pochylenia
miedzy, np. HB i Hispa, zawsze ta sama.
Dla Szcz.: HB 29st, Hisp 17st, więc opuszczenie=12st. rys. 4
Ponieważ HB w Szczecinie to 2st na zachód,
balustrada przebiega prawie dokładnie
w kierunku wschód - zachód.
Mała antena 60cm - Hispasat 30W.
Duża 80cm - główny kierunek HB.


rys. 5
Szacowanie kierunku Hispasata
metodą oświetlenia bocznego. Kierunek słońca 39E
Dokładny czas: http://susdesign.com/sunangle/. rys. 6
Metoda ta umożliwia oszacowanie kierunku każdego satelity.
Dla anteny 80cm, skierowanej na HB, słońce świeci
"z boku" dwa razy dziennie. Lipiec, sierpień ~godz. 8.

rys. 7
Ten sam talerz ustawiony na Astrę 2, 28.2E.
Elewacja lub uniesienie satelity, też 28st :-);
azymut=17E, w Szczecinie.
Opakowanie po Ludwiku jest dosyć wygodne
przy szybkim ustawianiu anteny na inny kierunek.
Na mocowaniu i plastiku robimy znaki flamastrem. rys. 8
Talerz na kierunku 30W, widok z drugiej strony.
. Widać kąt pochylenia anteny. Można go oszacować
przy pomocy funkcji trygonometrycznych.
Znaki flamastrem to 28st - 17st = 11st. pochylenia.
Kąt względem śruby górnej.
rys. 9
Często niestety, trzeba przełożyć mocowanie - uchwyt
talerza "do góry nogami". Kierunek Hispasat.
Elewacja satelity 17st; azymut=51E
W tym położeniu, też działa w Szczecinie. rys. 10
Skos w całej Polsce ~30 st.
Zgodnie ze wskazówkami zegara.
Nie jest to konieczne, ale znacznie poprawia
słaby sygnał. LNB "jakiś tam" normalny Samsung
--------------------------------------------------------------------------------
Do kompletu dodajemy LNB - Astra 2 (28.2E) i mamy prawie wszystko :-)
Kliknij i zobacz jak to zrobić
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این دو ماهواره رو روی این فرکانسها دنبال کنید.
Intelsat 902: 10973-V-27500-3/4
Turksat 1C:12565-H-27283-7/8

در اين ماهواره ميتونين شبکه تهران،خراسان،کرمان،خوزستان،فارس،آذربايجان،يزد،اصفهان،خليج فارس،بوشهر،کرمانشاه،یاسوج (دنا)،شبكه اول ودوم سوم و چهارم و جام جم 3 و شبكه آموزش و راديو پيام وساير راديوهای جمهوری اسلامی رو داشته باشيد.

فرکانس شبکه های این ماهواره به قرار زیر است:

10973 V 27500 TV1,TV2,TV3,TV4,TV5,IRIB3,AMOOZESH
11073 V 3600 AZARBAYJAN
11103 V 10000 BUSHEHR,FARS,KHALIJ FARS,Dena
11083 V 3600 ESFAHAN
11093 V 3600 KERMAN
11078 V 3610 KHORASAN
11042 V 3600 KHOZESTAN
11068 V 3600 MAZANDARAN
11088 V 3600 YAZD
11018 V 3100 TvKermanshah

Why have your dish aimed at just one satellite? With a bit of home bodging and experimentation, you can get reception of more than 1 satellite from one dish.

Mount a dish in the garden on an adjustable base.
The easiest way is to do what I do, and sit your dish on an old car tyre in the garden. (I used bricks originally, but they knocked too much paint off the dish - causing it to rust). Then you can just swing the dish round to whatever satellite you want to watch. This has distinct disadvantages during bad weather - believe me its no fun re-aligning the dish in heavy rain or snow!
If you try this you must make sure the dish can't blow over every time a gust of winds blows across the garden. I use a couple of wood laths jammed up against the back of the dish and always lay the dish flat on the ground if high winds are forecast.

More than 1 dish
Point 2 dishes at 2 seperate satellites. If you mount the dishes as shown in the picture below, you will likely be in breach of planning regulations in the UK, since normally you are only allowed 1 dish. However as long as one of the dishes is not permanently mounted, you may be ok. (This is not a definitive statement of UK planning law!) Read this: "A Householder's Planning Guide for the Installation of Satellite Television Dishes" which has much more information about this area.




More than 1 lnb on a single dish.
You can use more than 1 lnb on the dish. Until recently, 3 lnb's was the most I had seen on one dish, but here is a dish with 4 !



I have got a picture of a dish with 9 lnb's on it, but that is getting a bit extreme! Unfortunately it's not suitable for reproduction on the site.
Of course you would need a lnb switch box by your receiver if you decided to try these multiple lnb's. Or possibly have more than 1 receiver, with each lnb feeding a seperate box. This system works because as long as you use a big enough dish, you can get away with having lnb's off the main reception axis. The dish has its prime focus pointing at the weakest satellite cluster - probably Hotbird 13E in most of Europe. The other satellites are powerful enough to provide sufficient signal even though they are not being received at the prime focal point.
A simpler way of doing this is to fit a monoblock lnb. These are single lnb's that have two seperate receive heads within the casing. Most of them are set for a 6 degree seperation, so would receive Astra 19E and Hotbird 13E no problem. These have the advantage that most of them only require 1 coax cable, with the switching between the heads being done electronically by the receiver. This only works if the receiver has the facility for auto switching of course - not all of them have.




Motorise your dish.
Not a particularly cheap option, and definitely not for beginners to install. The dish has to track left-right, and also up-down to follow the orbital arc. The sorts of adjustments needed to get a dish like this working properly really need an experienced touch. If you are interested in this, get the services of a specialised satellite dealer to set it up (Not a Sky installer - most of them know how to install the toy Sky dishes and that's about it) .

Multi - satellite reception.
Why have your dish aimed at just one satellite? With a bit of home bodging and experimentation, you can get reception of more than 1 satellite from one dish.
Mount a dish in the garden on an adjustable base.
The easiest way is to do what I do, and sit your dish on an old car tyre in the garden. (I used bricks originally, but they knocked too much paint off the dish - causing it to rust). Then you can just swing the dish round to whatever satellite you want to watch. This has distinct disadvantages during bad weather - believe me its no fun re-aligning the dish in heavy rain or snow!
If you try this you must make sure the dish can't blow over every time a gust of winds blows across the garden. I use a couple of wood laths jammed up against the back of the dish and always lay the dish flat on the ground if high winds are forecast.
More than 1 dish
Point 2 dishes at 2 seperate satellites. If you mount the dishes as shown in the picture below, you will likely be in breach of planning regulations in the UK, since normally you are only allowed 1 dish. However as long as one of the dishes is not permanently mounted, you may be ok. (This is not a definitive statement of UK planning law!) Read this: "A Householder's Planning Guide for the Installation of Satellite Television Dishes" which has much more information about this area.
More than 1 lnb on a single dish.
You can use more than 1 lnb on the dish. Until recently, 3 lnb's was the most I had seen on one dish, but here is a dish with 4 !
This picture is taken with permission from the website of Gerd Schweizer in Germany, and was provided by Hauke Peinz.
The 4 lnb's, can receive Astra 28.2E / Astra 19.2E / Hotbird 13E / Sirius 5E !!
And here is a dish with 5 lnb's!
I have got a picture of a dish with 9 lnb's on it, but that is getting a bit extreme! Unfortunately it's not suitable for reproduction on the site.
Of course you would need a lnb switch box by your receiver if you decided to try these multiple lnb's. Or possibly have more than 1 receiver, with each lnb feeding a seperate box. This system works because as long as you use a big enough dish, you can get away with having lnb's off the main reception axis. The dish has its prime focus pointing at the weakest satellite cluster - probably Hotbird 13E in most of Europe. The other satellites are powerful enough to provide sufficient signal even though they are not being received at the prime focal point.
A simpler way of doing this is to fit a monoblock lnb. These are single lnb's that have two seperate receive heads within the casing. Most of them are set for a 6 degree seperation, so would receive Astra 19E and Hotbird 13E no problem. These have the advantage that most of them only require 1 coax cable, with the switching between the heads being done electronically by the receiver. This only works if the receiver has the facility for auto switching of course - not all of them have.
Motorise your dish.
Not a particularly cheap option, and definitely not for beginners to install. The dish has to track left-right, and also up-down to follow the orbital arc. The sorts of adjustments needed to get a dish like this working properly really need an experienced touch. If you are interested in this, get the services of a specialised satellite dealer to set it up (Not a Sky installer - most of them know how to install the toy Sky dishes and that's about it) .