TWIN-LNB & Dual LNB

 TWIN-LNB An LNB with dual outputs to connect a satellite receiver to a television set and a satellite modem to a computer. This makes it possible to watch television and access the internet at the same time, provided internet access is available.

http://www.satellite.se/ordlistaen.html

"Dual LNB" or "Monobloc LNB"

Comprises two universal LNBs fixed together at a small angle in a single housing. Only one "F" connector is used. A single coaxial cable connects to the Digital (or Digital + Analogue) receiver which must be able to use DisEqC signalling to select which LNB is to be used. Normally used on an 80cm dish to receive Astra at 19.2'E and Hotbird at 13'E (but not simultaneously).

monobloc setup monobloc setting up

This type of LNB has a single output and the actual satellite signal is selected by the receiver which sends a DisEqC (22kHz) pulsed tone up the LNB cable. So only one satellite transmission can be viewed at a time. This is in contrast with dish systems that have two or more separate LNBs where, with two receivers, both satellite transmissions can be viewed or recorded simultaneously. See picture HERE. Not compatible with a Sky Digibox. Not usually suitable for fitting to a Sky minidish (although it can be done - but expect poor performance in bad weather).

http://www.satcure.co.uk/tech/lnb.htm#dual