Dissecting the DiSEqC
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Dissecting the DiSEqCby Tommy Technician. – Staff Writer for n2newsAs part of your FTA satellite installation you probably have a small metal or plated device that looks like a sea creature with COAX cables coming in and out of it. This device is called a DiSEqC which stands for “Digital Satellite Equipment Control” and is pronounced “Die-Seck”.
 This is your average diseqc switch
In order for satellite systems to fit more channels in the same amount of space they broadcast channels using vertical and horizontal polarization. A DiSEqC is like a small phone operator for the satellite word that takes a look at all the signals coming in from the Dishes and tells them which stations to pass back to the receiver. The receiver sends a signal in the form of a tone or by raising the voltage on line. The DiSEqC device understands these signals and tells the LNB what signal to pass to the receiver. If you have One LNB going to One Receiver, you do not need a switch. If you have One LNB going to Two Receivers, you most likely do not need a switch but you will need an LNB with dual outputs. If you have Two LNBs going to One receiver you need one of the following: An A/B Switch, a 2×1 DiSEqC, a 4×1 DiSEqC, a 22KHz switch, or a 4×4 Multiswitch. An A/B switch is a very inexpensive manual switch and is not recommended. A 2×1 is not widely used any more but the 4×1 DiSEqC switch is the most popular around and often shipped free with your FTA receiver. A 4×1 DiSEqC switch has 4 coax inputs, generally 2 on each side. These are called “Ports” and go to each LNB in your satellite setup. A 5th plug labeled Out or Output will lead to your one receiver. Tip: Take notes when you install yourDiSEqC so you know which dish (110, 119, 129, etc) is on which port as you will need this to configure the receiver. A 4×4 Multi-Switch is a higher end switch that has 4 inputs and 4 outputs. Generally they require the first port to provide power through a special injector that plugs in near the receiver. These flexible and powerful switches offer a lot of expansion as the can power up to 4 different receivers. DiSeQC comes in many versions. The initial version (1.0) supports 2 to 4 different LNB sources. Version 1.1 supports up to 16 different LNB sources. Version 1.2 and 1.3 add support for motors and for other types of devices used to turn and point dishes. Newer devices, some still in the lab but other hitting the market use DiSEqC 2.x to automatically scan the sky and locate all the satellites and provide automatic access to all of them. Tommy the Tech uses a simple DiSEqC 1.0 setup with a 4×4 powered switch. or If you aren’t a member but you need the latest working autoroll BIN files and keys to get your receiver back up now then Sign up with N2News below: |
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