With some Inverto Unicable LNBs it is possible to combine the signals from up to 4 LNBs so as to receive signals from different satellites. The receiver chooses which LNB to use by sending a Diseqc 1.0 command. To work the LNBs have to be programmed to know whether to recognize a Port A, B,C or D command. Once entered the port setting is retained by the LNB even if there is no incoming power.

Is there any Vix Linux software that can be used to program these LNBs?

Inverto do have a tool for performing this task. There are other LNBs that work in a similar fashion.