I don't know if that should be much of a concern. Once the channel is tuned, I would think the TA sits idle until the next SDV channel is requested. I have nothing to base this on; I gave back my cisco 1520 when I dropped cable awhile back. I don't know if I agree with that. If a system were 100% SDV, that would free up tons of bandwidth. For example, there could be a bunch of new children's programming on during the daytime if "popular" channels like HBO weren't provided as linear channels, which are probably NOT viewed during that time. Cartoons take a lot less bandwidth than high-motion live programming, because of mostly static backgrounds. Perhaps lrhorer could set me straight here, but I'm wondering if SDV can be controlled at the distribution level as well. In other words, would someone on the East side of town be able to tune an SDV channel (without a TA) that was requested by some that requested that channel on the West side of town?