User talk:Linuxcolor

What is an ODU?

ODU (Out-Door Unit) refers to the set of satellite equipment which is placed outside of the building.

The ODU typically includes:

* The satellite dish * The BUC (Block Up Convertor) * The LNB (Low Noise Block)

The ODU is connected to the IDU (In-Door-Unit) by the IFL (Intra-Facility-Link).

What is a BUC?

A BUC (Block Up-Converter) takes an L-band input and transmits it upstream to the satellite on Ka, Ku, or C band.

BUC's are rated according to their output power. A low power Ka band BUC can transmit with as little as 2 watts, while a high power C-band BUC can transmit with as much as 200 watts.

The BUC is sometimes referred to as the TXB (Transmission Block).

What is an LNB?

An LNB, or Low Noise Block, is an amplifier which receives the radio signal from the satellite after it has been reflected by the satellite dish.

In addition to amplifying the signal, the LNB also converts the signal to a frequency usable by the In-Door-Unit.

The functions of the LNB were at one time provided by two separate components, a Low Noise Amplifier (LNA) for signal amplification and a block downconverter for downconversion.

Most LNB's used for satellite television include an integrated feedhorn. An LNB with an integrated feedhorn is known an an LNBF.

C Band LNB's are measured in degrees Kelvin, with a lower number representing a higher grade LNB. Ku and Ka band LNB's are measured in decibels, with a lower number also representing a higher quality LNB. Dual and Quad LNB Units

A Dual LNB will allow you tune into two separate satellite signals at once. This is very useful if you have two television sets and wish to watch different channels on each of them. Quad-LNB's also exist for those with more than two television sets.