This article will be long, but briefly and educational as usual on Cband satellite. Also, all the images i will be using for illustrations are mine. I don’t download dish from the internet and put my name on it. So i’m giving you this base on my knowledge and i know it will be beneficial for the starters or let me say beginners out there.
The talk of the town is now “BUD”. BUD simply means “BIG UGLY DISH“. Most times people find it useless or let me say calling it old school, but forgotten that in satellite world, dish are “the bigger the best”. Everyone is now going “CBAND” because it’s where entertainment is and rest of mind. I have been told by many of my friends across Africa that Nigerian is closer to many satellite, but we just too blind. I do spend alot gathering lnbf just to make sure i get what i want. Infact i have once purchase a cband lnbf of #22,000 from USA, it’s not even working at all. As bad it is, i tracked NTA on 34.5west and replaced it with the lnb, it was showing me red. So in essence, if you want to consider opting for bigger dish, Cband, you must get closer to installers that specialized on Cband installations. They’re rare, but they are available and they can charge you as high as #20,ooo to install a cband satellite for you.
In satellite, Cband most especially, we have the “CIRCULAR and LINEAR” satellite. Cband frequencies are always 4 digits, while at times the symbol rates are always 4 or 5 digits . The Circular Cband are always something like this “4148 R/L 9147” while linear Cband satellites, it’s “3777 H/V 3777”. In other to make us receive Circular satellites, we use the “Di-electric plate”. That yellow biscuits that comes with the cband lnb when you got it at first.
Further Explainations on Cband and Linear Satellites
To receive signals from a circularly polarised satellite you require a device that converts circular to linear polarisation, this can be achieved through two methods. The first method is by inserting a dielectric plate in to the existing LNBF.
This method is by far the simplest and least cost intrusive method to receive circular polarised satellite signals. However, this method is very inefficient and will reduce your satellite dish’s performance by 3dB or effectively halving the size of the satellite dish you are using.
The second methods uses a device called a waveguide polariser, this device is installed between the feedring and the LNB on a satellite dish and allows the reception of circular polarised signals. This technique will preserve your satellite signal strength at the current level. This second method, the Waveguide Polariser is the most efficient method to receive circular polarised satellite signals.
Now let me come down a bit as it seems i’m going gaga here 😀 :D.. Di-electric plates reduces the quality of your dish by 15- 18% , while that horn attached to the white scalar ring increases your signal by 12- 15%.
Now let’s take a typical example on a circular and linear satellite.
Here’s my dish setup for Linear and Circular satellite;
The TP for the Circular Sat is 4147 H 9148. Which is same as 4147 H 9148 when converted to linear by using the dielectric plate or tick tinted glass.
The above satellite on that dish is 57.0E below, 68.5 above.
To track a circular satellite, you will insert your dielectric plate to the lnb. If you place straight, it means it’s on “H” and if you put on vertical, it’s “V”.
Before using a Cband lnbf, you must know how to fix it on the white small scalar for easy job. This is what i mean;
You tie the small white scalar at the edge of the last line on the LNBF.
For linear satellite, that is, if you see tp with 4.064 v/h 19500, it means you don’t need glass or the yellow biscuits. You only fix your lnb on your dish and track.
Another issue is balancing of signals and lnb skew. Many people don’t even know what we call “skew to 6’oclock” or whatever o clock we call. This simply means, turning your lnb head to face a different directions, that’s why we often use the oclock thing.
Also another thing, for tracking a cband satellite, you must learn how to use satellite metre. It makes you more professional and with the beep sound, you will easily identify the satellite when you are almost there and already there;
That is my personal satellite metre. It’s not the TV type or video and it’s very expensive. I will advice you not to waste your money going for any satellite finder if you only know how to track dstv and joytv. Sat meters are a lil’ bit advanced for those that are already in the field for years. I have seen many guys with sat metre and yet they carry 4669 to finally track because they don’t know how to use it.
I hope with this little hints, you should at least have some hints how to track a cband satellite and how to identify the satellites TP whenever you come across any.
I will find time to share with you some funny satellite setups i have done and explain to you how to calculate satellite degrees to position your lnb and adding at least 3-4 lnbf on a single dish.
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