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including the vertical and horizontal signals. The receiver has to select the proper one for each channel.<ul><li><a href="http://www.solidsignal.com/cat_display.asp?CAT=Multiswitches">Link</a></li></ul>

However with comcast - you should only need high band splitters (and I would get powered ones for that. You might check AVSForums for details on the Comcast DVRs and hook ups. I have not stayed up to date with cable in the past few years. I suspect you may not need dual inputs with their DVRs (which is a must with sat due to the polarity of the signal (each tuner must access a LNB polarity)

BTW - You will only have more HD than D* for the next five months - then Directv will have up to 100 by the end of the year. Also with cable - many of the SD channels are still analog with terrible looking picture. The do not rebroadcast these analog signals with their digital box.

Hope this helps<ul><li><a href="http://search.solidsignal.com/?i=1&amp;i1.x=21&amp;i1.y=14&amp;q=distribution&amp;site=com&amp;u1=q">You might need one of these - check comcast and AVS forums for helpt</a></li></ul>

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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.

What about multiswitches with Elliptical dishes? If you have the oval dish with two "dual LNBs" (4 cables), each of the Dual LNB's look at different satellites (101 degree and 119 degree satellites). A multiswitch is needed to see the second satellite. A multiswitch comes with the dish and is usually have 4 outputs. Multiswitches for elliptical dishes need to have 4 inputs so it can switch between the 4 LNBs rather than the 2 in the explaination in #7 above.<ul><li><a href="http://www.tivocommunity.com/tivo-vb/showthread.php?t=55509">TiVo community</a></li></ul>

Having the central distribution system would be blessing to the installer.