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September 11th 06, 03:10 AM
posted to alt.radio.broadcasting,rec.radio.shortwave
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Bitten again by IBOC
David wrote: On Sat, 09 Sep 2006 14:04:31 GMT, Ron Hardin wrote: I recorded Limbaugh yesterday, thinking to play it back later. I forgot WTVN 610 Columbus OH was running IBOC, and so there's a huge hiss and rumble on the entire recording, from interaction with the receiver's sync detection (Sony 2010). You not only get the favored rain-barrel acoustics, but there's a great clatter in the background throughout. This is the _designed_ result, not some interference with some other noise source. You can't use a sync detector on an IBOC AM station unless you get both sidebands. The digital carriers are 180 degrees out of phase so that they cancel each other out in a regular receiver. This is interesting. How many radios besides the AR7030 have this type of sideband? |
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