What is LNB ?
Low noise block is a sensor on the dish to detect the signal. The lower the noises figure the better is the quality. Typical good quality LNB has a noise figure of 0.3db and a gain of 60 db. Dual or quad LNB have higher noise figures and lower gain. It can reduce the signal quality. Most receivers have built in splitter and switch, which you can cascade, to second receiver. If the first receiver is turned off, the motor control will transfer to second receiver and so on. There is a signal lost on each cascade.
