AVS Addicted Member
Join Date: May 2002
Location: Collingswood, N.J.
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Correct, DTA's are not HD-capable. Period.
Based on the info, it's probably safe to assume that the OP's cableco is all digital, he has to use a non-HD STB and/or a DTA for subscribed basic/expanded basic cable channels. He is able to receive HD locals in the clear using the TV's internal tuner.
Re-read the first post.
1) He a cable feed split on primary TV. One for STB (non-HD) and one directly to TV for QAM/HD. No issue.
2) He will have a new secondary TV with only one RF input and a bare bones STB (RF only). An A/B switch will allow him to select either a direct feed for QAM/HD or STB feed for the additional SD channels to which he subscribes.
Another option for the OP is to rent two HD-capable STB's. Costs a bit more per month, but eliminates the need for splitters and switches.