Monoblock LNB
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A Monoblock LNB is a type of Low-noise block converter used in communications satellite reception. This dual LNB is the simplest solution to achieve multifeed reception for two satellites.
This design consists of two independent LNBs in a single case. The two LNBs can be automatically addressed with any DiSEqC 1.0 or higher receiver. In some cases they can also be addressed with ToneBurst/MiniDiSEqC. However, they are only available for satellites with a fixed 3degree, 4.3 degree or 6degree spacing. In Europe, for example, there are monoblock single, twin and quad LNBs for the Ku band, which have a pre-defined spacing of 6 degrees (for Astra 1 / Hotbird or Astra 1 / Astra 23.5°E, for example).
Since March of 2007, a new type of monoblock, called the DUO LNB is introduced by Canal Digitaal in the Netherlands for the simultaneous reception of Astra 1 and Astra 23.5°E with a spacing of just 4.3 degrees. Unlike most other monoblocks, the DUO LNB was designed for 60 centimeter dishes, which is new because most monoblocks are designed for 80cm dishes. this monoblock This special DUO LNB is available in twin and quad versions.