Wide-angle LNB for Sun Direct HD (2 degree separation)

[trishq]

Hi,

as you guys probably know, Sun Direct is the only DTH in India trying to catch two satellites at two different locations using a single LNB.

The satellites are located at 91.3 and 93.5 degrees East, and are therefore 2 degrees apart.

If I tune for 93.5 and try to get the best signal, the 91.5 measat gets cut and vice versa.

The only option is to turn it to 92.5 degrees and get partial signals from both. However, since 93.5 transponders need to be of higher quality (HD channels), I have to turn it to 93 degrees.

I have seen that using short LNBs along with Dish TV's wide dish is good for improving the signal. Currently, I am using Dish's LNBs, which are the shortest I could find.

However, because the dish is oval (horizontal), I am having some trouble getting the Vertical polarity signal from the weakest transponders (highest frequency) on Measat - 12603 and 12643. However, the horizontal signals are coming in fine (49% signal quality on stb).

I purchased a high-gain LNB from solid. However, it gave even poorer signals because it's very long (the feedhorn is long). As a result, it cannot be used for getting two signals at the same time.

I have tried Sun, Videocon, Dish, and Reliance LNBs. Reliance LNB is also decent, but has the opposite problem -- it gives me Vertical signals, but the H signals are weak or non-existent.

Any idea how to fix this, without tilting it further towards measat?

I have already tried using a bigger dish from Reliance 65 cm. But I'm using it for Airtel right now.

 

[Devesh]

You mean to say mono block LNB which is dishtv using ?

 

[trishq]

Yes, I'm using the monoblock LNB from Dish TV. But both LNBs are not in use, as the Sun Direct box is configured to use only one LNB. Actually, I just went up and turned the LNB 180 degrees, and now both V and H are coming at the same strength (49% signal quality). Let's see if it works.

 

[trishq]

The Dish TV monoblock is designed for 6 degrees separation I think. So I'm not even trying to use the dual-LNB set up. I tried searching for a dual-LNB set up with 2 degree separation, but nothing is there in the market.

 

[bhaskarkilli]

Actually my tata sky lab did not work for Sun direct. Even signal also very weak because now I am using tata sky dish.heard Sundirect dish is little bit big comparing to other dishes.

 

[trishq]

Yes. You cannot get the HD service and the SD service using the regular 60 cm dish. But you can get it using a 65 cm dish or by using Dish TV's horizontal oval dish, which is designed for use with multiple LNBs. That was something I realized early on. They should switch to a monoblock dual LNB like Dish TV.

 

[bhaskarkilli]

Yes. You cannot get the HD service and the SD service using the regular 60 cm dish. But you can get it using a 65 cm dish or by using Dish TV's horizontal oval dish, which is designed for use with multiple LNBs. That was something I realized early on. They should switch to a monoblock dual LNB like Dish TV.

Seems need to change my dish also.

 

[trishq]

Yeah. But the sun direct agent said he will give both satellites on a single 60 cm dish. He came, fixed it, and then after two weeks, I started losing the HD signal for some transponders.

 

[trishq]

That said, there's some interference for me, in the shape of some branches. Perhaps, in a clear sky, it might work.