We’re coming up pretty quickly on the official start to the One Year Countdown to the Digital Television Transition.

On the off-chance that the preceding sentence was complete gibberish to you, let me step back and explain. The DTV Transition refers to the coming switch from analog to digital over-the-air broadcast television. Congress has mandated that after February 17, 2009, full power television stations will stop broadcasting in analog, and will broadcast in digital exclusively. Changing over to a digital format will create efficiencies in the use of the radio frequency spectrum on which the nation’s TV broadcasters transmit their signals. Some of the old spectrum that’s freed up will be made available to first-responders such as local police and fire departments and will enhance the way they react to emergencies, which will significantly increase public safety for all Americans.

That phrase “full power broadcast TV stations,” however, is a really important distinction, as the FCC’s website points out:

While the majority of consumers in the U.S. can receive the programming of full-power over-the-air stations, there are three other categories of broadcast TV stations – “low-power,” “Class A,” and “translator” stations. There is currently no statutory deadline for these stations to convert to digital broadcasting.

That page defines what these stations are, but it’s useful to remember that not every station broadcasting in America is going to be transitioning next year.

But there is a solution: analog pass-through in digital-to-analog converter boxes. You’ve possibly heard that you can buy a converter box that will let your old analog TV sets receive and display over-the-air digital signals. There are some of these boxes that will also “pass-through” an analog signal, in addition to performing the conversion for the digital ones.

The National Telecommunications and Information Administration (NTIA) has a list of converter boxes that are eligible for their coupon program, which allows consumers to apply to receive up to two vouchers that offer a significant discount off the price of the converters. That list clearly marks the models that are “capable of passing through an analog signal to the TV set.” Right now, there are three such boxes, but it is expected that additional models will be available in the future.

For more info on the DTV Transition, you can visit the cable industry’s website GetReadyForDigitalTV.com or the NTIA’s website on this topic. If you’re a cable customer, the good news is that for any of your TVs hooked up to cable, you shouldn’t have to do anything to continue enjoying full power broadcast TV stations in their new digital format, whether you have a hi-def television or not.