A monoblock (or monobloc) LNB is a type of low-noise block downconverter used in communications satellite reception, this multiple combined LNBs is the simplest solution to achieve multifeed reception for two, three or four satellites.
This design consists of two, three or four independent LNBs in a single case. The two, three or four 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°, 4.3° or 6° other spacing.
Most receivers which are sold nowadays are compatible with at least DiSeqC 1.0 which allows to switch automatically between 4 satellites (all of contemporary Monoblock LNBs), as user changes channel on remote control.
View More On Wikipedia.org