The amount of space the HD signal takes up depends on the modulation. If your cable company is using 256 QAM, they can actually fit two HD channels in the space of each analog. If they are using 64 QAM, they can only fit one. I'm not sure about other modulation types, but most cable companies are migrating toward QAM if they're not already there.
Basically, a lot of problems will just go away along with analog :-)
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The amount of space the HD signal takes up depends on the modulation. If your cable company is using 256 QAM, they can actually fit two HD channels in the space of each analog. If they are using 64 QAM, they can only fit one. I'm not sure about other modulation types, but most cable companies are migrating toward QAM if they're not already there.
Basically, a lot of problems will just go away along with analog :-)