LNB on a Motorized Dish

[rizwan]

Re: LNB on a Motorized Dish

If there is some mechanism for adjusting LNB as well as move the Dish ? Is there such type of Feed Horn

[gianni253]

Re: LNB on a Motorized Dish

AFAIK there is no possibility to dynamically adjust lnb ... only arc tracking can be fine tuned.

[joseram2000]

Re: LNB on a Motorized Dish

1 - Choice of installation point.
For the choice of engine installation point, we have to take into account first of all take the south clear, and that there is no object that comes between the satellites and the antenna, such as a tree, a wall, etc..
2 - Mounting Support:
Although you can place a sopot in L strongly recommend placing a wall clawed mast, as the key to good orientation of the engine will be in leveling the mast. Thus, proceed to place the grip and screw the mast Perfectly Leveling.
3 - Mount Motor.
Proceed to the motor mount as shown in the image by adjusting the nut to the value of your local latitude. See Table 1 and look at the first column of your local latitude.
Securely tighten the nut, and once installed the whole, if you need to fine tune the orientation should be performed on nuts dish and not the engine.
Once assembled the engine, proceed to anchor the mast, leaving previously leveled nuts tight enough not to fall, but with the foresight to move it later to fit.
4 - Assembly dish.
Assemble dish as per the drawing, leaving the LNB in the 6 o'clock position as if it were a clock, setting the elevation according to the geographical position of their city which can be found in Table 1.
Do not tighten the nut lifting since surely we will have to modify it slightly.

5 - Anchor Dish to the Motor
Mount the brackets on the motor shaft as shown in the picture. Locate the center of the dish clamp exactly coinciding with the longitudinal axis of the motor, and at least 1 cm. the end of the motor ****, to avoid overloading the engine weight, and tighten the nuts hard to not come loose.
7 - Configuration Receiver.
Before we proceed to the orientation of receiver configuration. Configure USALS mode (known as GO TO-X in other receptors).
We went into the menu and selected facilities USALS mode putting the latitude and longitude of our área,
Facing Motor.
We spent the final and most important point of our facility. We must guide all Parabolic + Motor.
With the help of a compass will dish + motor assembly as close pointing true south and from there we will begin the orientation.
Many installers recommend sending the engine to Intelsat 1 ° West, as it is the closest to the south, auque we send to Hotbird, as it is a satellite that is located more easily.
In theory, if the mast has been leveled, LNB at 6 and the whole south looking perfectly true, should have located the satellites. That in theory, but our experience tells us that it is NEVER the case. Thus once we refine the engine Hotbir motor + dish. For this we recall that we left the dish elevation and anchoring the mast motor slightly loose, to now be able to move, and so to tune it as if it were a fixed antenna, only the azimuth we vary it from the engine mounting the mast.
Once we have the maximum signal on Hotbird, Astra engine and sent there with input signal check. If so send Hispasat, and here again we have to refine the signal as it almost certainly will have to tweak.
Once tuned Astra Hispasat go to check that we also have signal. If no signal, we have met our goal, if not, tendermos to see the difference in elevation between Hispasat and Astra, and if it is not much and can be shared, to get a signal on both satellites.
The typical error is in the installation of an engine is usually always the same:
I locate all Eastern satellites, but the West does not, what happens?
Our experience says that 99% of the cases is that the mast is not perfectly level. Most think that if it is, because I have found a placement level, but you have to tell the time when you place the dish + motor set your weight can slightly tilt the mast
Another typical error is that at the beginning of the orientation, the engine does not go to the desired position. This sends the engine with the remote control 0 position and reset the engine from the bottom with the help of a needle.

[sucan]

Re: LNB on a Motorized Dish

One other thing, note that some transponders cannot be picked up dependent on location even though you are picking up other transponders on that same satellite! It happens to me on turksat 42east and Badr as well as Nilesat 7w...

You are right, there are huge differences in signals between some transponders even on same satellite. Some transponders have those differences in signals even through different hours of same day.

[rob45]

Re: LNB on a Motorized Dish

hi i have set mine up on mbc on 26 east thats the worst one for me then the signal on the other sats seem to be very good.

[rizwan]

Re: LNB on a Motorized Dish

You are right, there are huge differences in signals between some transponders even on same satellite. Some transponders have those differences in signals even through different hours of same day.

Signal strength vary for different duration of day mostly, when you are on the edge of foot print. Now a days Satellite companies try to reduce the signal output from Satellite to increase the life span of Satellite

[odysseas1991]

Re: LNB on a Motorized Dish

Signal strength vary for different duration of day mostly, when you are on the edge of foot print. Now a days Satellite companies try to reduce the signal output from Satellite to increase the life span of Satellite

What you guys are saying is also true, but what I further meant was this: There is some satellites that are shared at the same degree angle and hence you cannot pick them up at all, for instance some transponders in Turksat belong the 2A satellite as opposed to the 3A...

[Mobley3]

Re: LNB on a Motorized Dish

There are a lot of Satellites out there that have beams which are difficult to receive in certain areas, I.E Thor Nordic, Badr 5+6 to name 2 which are difficult in Ireland.

Regards Mobley3

[rizwan]

Re: LNB on a Motorized Dish

Transpoders have weak signals with motorized dish , workd slightly better on fixed dish, because of accurate setting of LNB for this particular satellite

[Mobley3]

Re: LNB on a Motorized Dish

You will also keep in mind that as the dish size increases the focus becomes a lot tighter.
If you step up from a 90Cm dish to a 1.1Mtr you need to spend more time setting up.

Regards Mobley3

[purenirvana]

Re: LNB on a Motorized Dish

as the dish size increases the focus becomes a lot tighter

This is exactly why I like to work with LNBs that have a long neck. They give you the opportunity to really home in on the focus point of the dish.

[pan1300]

Re: LNB on a Motorized Dish

Transpoders have weak signals with motorized dish , workd slightly better on fixed dish, because of accurate setting of LNB for this particular satellite

hi rizwan

not necessary, I've seen same results on the same dish (first fixed, afterwards motorised) - ok, perhaps needs some offset now and then, but signal wasn't worse than fixed.