[Decolliber]

Thanks Moses!! I found the answer immediately:

6. Can I use a splitter to add more receivers or add dual Tuners to my DirectTiVo? NO....this is where multiswitches come into play. You cannot use regular splitters. From the explaination of LNBs above, you should understand that if I split an LNB with a regular splitter, then I will have two receivers using the same LNB and fighting over looking at odd or even transponders. One or both receivers will only be able to see half of the channels.

7. What is a multiswitch? A multiswitch takes the input from both of the LNB's (both cables from a dual LNB dish HAVE to be connected to the multiswitch)...it then locks one of the LNB's to always look at the even transponders and the other LNB to always look at the odd transponders. This is why a multiswitch only works with Dual LNBs and not single LNB's. The switch then has multiple outputs to receivers (4,8,etc). When you connect the receiver to the multiswitch, the switch determines which of the two LNB's the receiver needs to look at depending if it needs to view odd or even transponders. When you change the channel, the switch then swaps your connection to the other LNB when needed. With a multiswitch, the LNB's never change which side they are looking at.