Quote:
Originally Posted by andy
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Does ATSC even require a different power output stage, or can they re-use their old one?
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The old one generally will work fine, but the plumbing generally wouldn't meet the FCC mask. This is how many of the early tests were set up, when meeting the mask was not critical for interference during broadcasts from a single isolated transmitter. With the interim and final frequency allocations for 1600 stations, however, there were/are many cases of adjacent channel operation, especially digital next to analog during the transition years, so the mask was critical. The FCC was often clever in assigning an analog station their own adjacent channel for digital, thus making it in their own interest not to interfere with themselves.
Edit: I shoiuld note that the FCC mask specification didn't even exist during the early tests.