LNB or the Low Noise Block-Downconverter plays a significant role in satellite TV set up, it is the center of attraction on a dish. It is located at the end of the arm and pointing or facing the dish.
The name is somehow literal to its function, it actually gathers or receives signals (Ku band - High frequency) that bounced off the satellite dish and converts it to low frequency (unwanted signals are filtered), it amplifies it and send it to the cable unto the receiver inside the house for viewing pleasures. It is assume of course that the Azimuth and Elevation angle and set up is correct.
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