Thanks for the explanation, it was very informative. The LNB that i have is the one you described as "the dual lnbf was an option and it looked like a cylinder with 2 coax connectors on the back". So it looks like i will be able to use my multi switch.
One other question regarding the multi switch. The switch i have i believe has 2 inputs to give me 4 outputs. If i hook this up, will it lower my signal strength or will it stay the same for all the receivers?
some multiswitches are powered by the receivers connected to them and there is usually a small loss in signal strength going through them, nothing to worry about unless your signal is already low. if the switch has a separate power supply, there may be an amplifier built into the switch to compensate for the signal loss.