Is a digital converter box really necessary for my TV?

Television holds great significance for many people in the United States, but the technology behind it has evolved slowly since its early days. TV development began in the 1870s, but it wasn't until the advent of electronic television in the early 20th century that it became widespread. While regular broadcasts existed, mass adoption didn’t happen until after World War II. In 1945, only nine commercial TV stations were on air, but by 1949, that number rose to 48. By 1960, there were 515 commercial stations, and TV was present in 85 percent of American households [source: Federal Communications Commission (FCC)].

Color television was introduced as early as 1946, thanks to CBS engineer Peter Goldmark, who also contributed to the creation of the long-playing vinyl record. He developed a color broadcasting method, but unfortunately, it was incompatible with existing TVs. In 1953, the National Television Standards Committee (NTSC) chose RCA's color broadcasting system instead.

Since then, we've seen gradual technological advancements like the remote control, cable and satellite services, and videocassette recorders (VCRs). However, none of these are strictly necessary to watch TV. If you live near a broadcast station, you can still connect a set of rabbit ears to your antenna input and enjoy the programming.

On February 17, 2009, several analog channels in the United States ceased broadcasting, with the remainder following suit on June 12, with a few exceptions. U.S. broadcasters have now fully transitioned to digital television (DTV). This change was necessary as broadcasters moved their signals to a new section of the radio spectrum. One key reason for this shift was to create space for public safety communications like police and fire services. The remaining broadcast frequencies will now be used for consumer wireless services.

The original schedule for the analog-to-digital switch had to be delayed because the FCC needed more time to inform the public about the change. The goal was to ensure minimal disruption, though their efforts led to some confusion. In order to receive digital signals, many viewers will require a converter box.

If you're in the United States and still use a traditional antenna to catch TV signals, this could explain why your old channels are no longer available.

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Digital TV Conversion

You might assume that with the shift to digital television, a new, costly high-definition television (HDTV) is necessary. While it's true that HDTV offers improved sound, larger screens, and higher resolution, you don’t have to purchase one if you don’t want to. Though prices have dropped thanks to increased competition, many households still find these sets out of reach financially.

So is buying a new, advanced TV and discarding the old one a must? The straightforward answer is no. If your TV already has a built-in digital tuner – the component that lets you tune into stations – then no new TV is required. However, if you’re still using an older model with an analog tuner, like many others, the transition doesn’t make your TV obsolete. In fact, it may even improve reception, though it won’t make the content appear in high-definition quality.

The difference between analog and digital is quite simple. Digital broadcasting is all or nothing, while an analog signal can fluctuate depending on factors like signal strength. If you’ve ever had to adjust the antenna to get a clearer picture, you’ll appreciate digital broadcasting. With digital TV, as long as there's a signal, you’ll get crisp audio and video.

That said, if your TV has an analog tuner and you’re using a terrestrial antenna (not a satellite dish), you'll need a digital-to-analog converter box to keep watching TV now that the conversion deadline has passed. You’ll need one converter box per tuner, whether it’s for your TV or for a videocassette recorder or digital video recorder. So, if you have another TV in another room, and it has an analog tuner, you’ll need a box for that one too.

Televisions that come with built-in digital tuners will likely be marked accordingly. If you're uncertain about your TV, check the owner's manual or reach out to the manufacturer for clarification. The internet is a helpful resource as well, with many companies providing details on older models online for easy access.

Do you have a digital cable or satellite TV subscription? If so, the set-top box provided with your service handles the conversion for you. The analog-to-digital transition primarily impacted local broadcasters. Satellite and cable services don’t operate on the same frequencies as local networks, meaning if you’re not using an antenna, the switch won’t have affected your service.

Are you an analog cable subscriber? Here's a tip: If you connect the cable directly to your TV, your cable company might be offering you analog service. The FCC mandates that cable companies provide analog signals for local stations that have switched to digital, as long as they continue to offer analog feeds for other channels. You may be fine for now, but if you’re concerned about future service interruptions, it’s a good idea to contact your cable provider.

There are a few exceptions to the digital conversion rule. Low-power, Class A, and TV translator stations don’t have to switch to digital just yet. These stations are typically local or rural ones, and while they weren’t required to make the switch in June 2009, they will have to transition at a later date [source: FCC].

If you frequently watch one of these stations, make sure to get a converter box with analog pass-through capability, so you can still receive those channels. Otherwise, you’ll need a signal splitter to divide the signal from your antenna for both digital and analog channels.

Benefits of the Analog to Digital Transition

The transition from analog to digital has allowed broadcasters to provide superior picture quality since digital signals can be compressed much more effectively than analog signals. Compression enables stations to pack more data into the signal. This means that digital television provides a clearer image than analog. Even though digital signals weaken over distance, much like analog ones, they maintain a consistent quality. As long as you receive the signal, the picture will stay sharp [source: Cringely].

Another key benefit of digital broadcasting is the additional bandwidth it provides. This allows local stations to offer a broader range of programming than they could with analog. How is this possible? Through multicasting, where multiple programs are broadcast within the same frequency. Many stations across the U.S. are already taking advantage of multicasting. For example, WRAL in Raleigh, North Carolina, airs a 24-hour news channel alongside its regular content [source: USA Today].

If you have a digital-to-analog converter box and a standard antenna, you can access the multicasting services offered by your local stations, provided they have it. However, keep in mind that cable and satellite providers might not add these extra channels to their offerings, so they may not be available to you if you subscribe to these services.

If you're still in need of a converter box, you might be eligible to receive a $40 coupon from the U.S. government through the dtv2009.gov website, depending on availability. Alternatively, you could choose to purchase a new TV with a built-in digital tuner, although this is typically a more expensive option.