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A monoblock (or monobloc) LNB is a type of low-noise block downconverter 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 3 degree, 4.3° or 6° 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 19.2°E/Hot Bird 13°E).
In March 2007, a new type of monoblock, called the Duo LNB was introduced by CanalDigitaal in the Netherlands for the simultaneous reception of Astra 19.2°E/Astra 23.5°E with a spacing of just 4.3 degrees. Unlike most other monoblocks, the Duo LNB was intended for use with 60 cm dishes (most monoblocks require a larger, 80 cm or 1 m dish). The Duo LNB is available in twin and quad versions.
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