Originally Posted by scott72
Thanks for the correction, I did not know that..
To give you more info, more gaps were needed between analog channels before so more channels were needed to fit in all the analog channels that were out there. With digital, there is less leakage and less separation needed. So, they were able to take channels 52 through 69 from the UHF spectrum and allocate it for the so-called "700MHz" wireless spectrum. The FCC auction is going on right now for these and over $10 Billion has already been raised.
All OTA high power analog signals have to be shutoff by Feb 2009 and these stations have to either vacate their existing channels (if between 52 and 69) or change over to digital on the same location. This depends on the market. For some TV stations, this means two changes because they are currently transmitting analog on one channel and digital on the other and after the cutoff, they actually have to vacate their digital channel and move it to another because their current digital is between 52 and 69. That's why in smaller markets these channels have not gone full power yet (such as Erie, PA).