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With an A/B switch, using only the built-in tuner of the TV, you'll need to go through the process of reconfiguring the tuner each time you want to switch from OTA (ATSC coded signals) to CATV (QAM coded signals) and vica versa.
On the up side, the A/B switch is less expensive than adding an external tuner.
Any attempt to diplex the CATV and OTA signals short of converting the ATSC format to QAM (build the equivalent of a CATV head-end... $$$$$$$$$$$$$$) will leave you with the same problem of reconfiguring the tuner via the TV's setup menu. To make it even less convenient, you may find a channel scan is required each time you switch modes.
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If the well is dry and you don't see rain on the horizon, you'll need to dig the hole deeper. (If the antenna can't get the job done, an amp won't fix it.)
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Last edited by GroundUrMast; 24-Jun-2012 at 7:15 PM.
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