Curry BlakeDate: 25th - 26th May 2013
DON'T MISS IT!!!
Venue: Spirit Word Ministries
There are various satellites that we can receive in South Africa offering, Data, Pay TV and FREE-TO-AIR radio & television. Many satellite installers only learn enough about one particular service and have gaps in their knowledge about the overall principals of satellite reception and operation. Since satellite operations have a common base, once we know enough about it, we will be able do installations and setups for more types of services. For demonstration purposes in this document, we will be using INTELSAT 7/10 as an example. INTELSAT 7/10 formerly known as PAS 7/10 are in fact two satellites at the same orbital position (www.intelsat.com). Here are some technical details about these satellites:
PLEASE NOTE THE FOLLOWING :
C-Band is for distribution purposes & can only be picked up by the correct C-Band antenna & LNB.
Depending on your location, one will require an antenna between 1.5m - 3.7m.
A person will have to be in possession of the correct decoder as well, in order to receive this DVB-52 signal.
Since we will be interested in Direct-To-Home reception, we will from now on be focusing on the Ku-Band beams.
HIGH BAND vs. LOW BAND
IS 7 and IS 10 satellites operates on different frequency ranges (BANDS). Since they are virtually at the same position, they cannot transmit on the same frequencies since they will “Jam” each other. IS 7 was launched first and transmits on LOW Band while IS 10 transmits on HIGH Band.
LOW BAND – INTELSAT 7 Ku Band (10.7-11.7 GHz)
*Used by Multi-choice/DSTV and Free-To-Air channels that mainly covers South Africa.
HIGH BAND – INTELSAT 10 Ku Band (11.7-12.75 GHz)
*Used by Free-To-Air channels to cover most of the African continent and portions of Europe.
VERTICAL vs. HORIZONTAL
Both satellites (IS 7 and IS 10) also transmit vertical and horizontal beams on their different frequency bands giving us a total 4 signal types to receive.
The positive side to the fact that both satellites are in the same orbital position is that a single
Universal LNB can be used to receive IS 7 and IS 10 on their different BANDs. These LNBs are also known as DUAL-BAND (UNIVERSAL) LNBs. Simply put, these LNBs are capable of receiving four signal types: