Efficiency of Dish

[rizwan]

Is there any method to analyze the efficiency of my satellite Dish or about its reflecting quality ?

[KVF1966]

Re: Efficiency of Dish

The efficiency of the reception is achieved, when the angle of radiation of satellite dishes coincide with the angle of aperture of the irradiator of the Converter.

[mahrkpat]

Re: Efficiency of Dish

The only method I can think of is the strength and quality of signal that you
recieve and setting the lnb correctly also place a part. The dish like a reflector in
a torch is just there to focus the signal in a tight beam its max focus point being
the lnb, all you need to look at is that the dish is not warped in any way that
leads to the focusing effect being lost.

[Satphoenix]

Re: Efficiency of Dish

Is there any method to analyze the efficiency of my satellite Dish or about its reflecting quality ?

Analyze of efficiency means you have to compare something. This means you need a reference.

A simple solution is to use a dish with same diameter (if you have one) and compare the signal strength and snr.

Prerequisite: It is equal adjusted than the first dish, same lnb, cables...

[pan1300]

Re: Efficiency of Dish

hi rizwan

I agree with the above posts, but why do you want to know? Thoughts your dish has problems? Signal/quality/strength worse than before? As said above: check signal strength and quality of a sat whoch should give good results (check footprint eg on satbeams and take the 'best' sat). If you really want to compare with other dishes, you must compare them 1/1 (but how do you know another on's better ? ).

From what I know, most problems come from not well aligned dish, lnb's, cables and connectors. Don't know which size your dish is, but if you're really not happy with the result, why not try/buy another one (not too expensive in 'usual' sizes).

[rizwan]

Re: Efficiency of Dish

I am using slightly big dish about 12 feet and I am not satisfied with its result so far. If its result is nice , so there is no need to replace it.

[KVF1966]

Re: Efficiency of Dish

The gain of the satellite dishes shall be determined by the diameter, It is applied to the definition of the focal length to set the LNB. There is a system of calculation, but it is used producers dishes.

[toby69]

Re: Efficiency of Dish

perhaps only way to test efficiency of your (12ft dish), note signal strengh/quality, on 1 chn, 1 satellite, then use your own box and test on a friends dish on same satellite same chn, and note signal/quality again, but could really never be accurate as 1 dish might be better aligned.

[herrr]

Re: Efficiency of Dish

One thing remains to be said: results of all comparative experiments are affected by not-so-affordable receiver instruments...
Often you see as similar two signals that with a professional analyzer you can find to be very different in quality.

[mahrkpat]

Re: Efficiency of Dish

With that big a dish what you have to make sure the dish is not warped and
if the dish is not warped then look at the lnb are you able to move it backwards
and forwards to focus or rotate to skew.
You need to make sure the distance between the lnb and the dish face is
correct I am sure there is a formulae to work it out.
You also need to make sure the lnb is pointing directly to the middle of the dish
and parallel to the dish face.
A misaligned lnb can cause a great signal loss.

[rizwan]

Re: Efficiency of Dish

perhaps only way to test efficiency of your (12ft dish), note signal strengh/quality, on 1 chn, 1 satellite, then use your own box and test on a friends dish on same satellite same chn, and note signal/quality again, but could really never be accurate as 1 dish might be better aligned.

As you know different users in same city have different boxes and different LNB, so result varies a lot.

[buiacco]

Re: Efficiency of Dish

Hi,
basically it's very important that the rod where is attached your dish is
perfectly vertical, especially if you mount a motor.
after this it important to verify your efficiency signal on the best sat on the middle of our sat Horizon.
Have a nice day.

[bokkie]

Re: Efficiency of Dish

Is there something you should be reciving but you're not?
Are you losing signal in bad weather conditions?
Are you trying to receive a fringe reception but you can't quite pull it In?
If the answer is no then their isn't really a problem is there?

[easydigital]

Re: Efficiency of Dish

In fringe areas, reception is not guarenteed by the satellite operators, for the channels ..

[rizwan]

Re: Efficiency of Dish

In fringe areas, reception is not guarenteed by the satellite operators, for the channels ..

You are right , I am at the edge of the foot print of Hotbird, On some transponders it have good signal and on some it behave like 8 feet dish