Monoblock LNBs
A Monoblock LNB (also spelled "monobloc") is a unit consisting of two LNBs and is designed to receive satellites spaced close together, generally 6°. For example in parts of Europe, monoblocks designed to receive the Hot Bird and Astra 19.2°E satellites are popular because they enable reception of both satellites on a single dish without requiring an expensive, slow and noisy motorised dish. A similar advantage is provided by the Duo LNB for simultaneous reception of signals from both the Astra 23.5°E and Astra 19.2°E positions.
Read more about this topic: Low-noise Block Downconverter