does all the sites have to be rebanded by jan. 2013 by the fcc like narrowband conv. does
There is no such overall deadline for rebanding, but the State of SC has set a deadline of December 31, 2012 as their deadline to complete rebanding of infrastructure (tower site equipment). When the rebanding process started many years ago, they expected to take 2-3 years, and that seems like it was more than 6 years ago.
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Brian I thought with rebanding only the first numbers in front of the dot decrease by 15. Do the others change too ?
So, it depends. You're correct that frequencies 866-869MHz will drop 15MHz, but that's not what causes the older trunktracking radios issues. The problem is when the frequencies 866-869MHz that end in "0" rather than "5" and drop to 851-854MHz. So, for example, a site using 868.4125MHz will not cause issues with older trunktrackers, but a site using 868.1500MHz will be a problem when it drops to 853.1500MHz.
Site 30 has no frequencies that have a "0" in the fourth place after the decimal, so it can still be tracked by older trunktrackers without issue. The same is true with sites 5, 6, 7 and 25 in the Augusta area that have been rebanded (I noted that in the db this morning).
But when a site like Site 19 Spartanbug rebands, I'll have some trouble with my older radios as 4 of the 10 frequencies have a "0" in the 4th place after the decimal. I'd miss 40% or more of the radio traffic with a radio that doesn't support rebanding.