Once again, sorry about not providing more frequent updates!
First some disappointing news: The on-air date of KTAB/KRBC's full-power DTV transmitters has been delayed until July. Something to do with unforeseen equipment delays and tower modifications...so no NBC-HD until then.
Saltsman brings up issues I haven't heard of, but then again I'm not in the day-to-day engineering loop. I do know, however, that NBC-HD was never planned for KRBC's old tower and LP DTV. At the very least, the existing 2ghz analog STL is incapable of carrying a digital signal. Only the new, multi-channel, digital 7ghz STL to the KTAB tower is capable of HD, as has always been the plan.
And to answer T-bone2006, Jeopardy and Wheel of Fortune aren't aired in HD because they are locally-originated syndicated programs. We have a very sweet master control facility, but it's still all SD for now (as are most local stations, especially in smaller markets). CBS and NBC network programming is not locally-originated; they're considered "live via satellite." The incoming network HD signals are in essence diverted around our local SD infrastructure and sent directly to the digital transmitter (though there is some fancy new equipment in the chain).
Jeopardy and Wheel of Fortune, like all syndicated programs, are delivered to us in advance via analog or digital satellite feeds, digital on-demand fiber-optics (in the case of Jeopardy and Wheel), videotape (BetacamSP, analog, or DVCPro, digital, both broadcast-standard component SD formats), or DVD. Same for the commercial spots.
Regardless of the delivery mechanism, all non-live programming is ingested into our bank of Leitch video servers, controlled by Avid/Sundance automation systems. Even though everything is "digital," there's a big, and expensive, difference between SD and HD. For a small-market broadcast operation, we're on the cutting edge; but upgrading our entire infrastructure to total HD, including syndicated programming and news, will require more time, and even more millions of dollars.
It will happen eventually, though!