Why Do Local TV Stations Still Broadcast If They're on Cable, Satellite, and Online?

If a station's channel already shows up on cable, satellite, and in an app, why does it still run a transmitter? The question is sharpest for a small independent or religious station, where plenty of households find it easier to scroll to that channel on a cable lineup than to aim an antenna at it. Why not shut the tower down, save the money, and simply be a cable channel?

The answer turns out to be one of the more interesting pieces of how American television is put together. Broadcasting isn't a leftover habit that stations haven't gotten around to quitting. For a lot of them, the transmitter is the entire reason they get on cable at all.

It also happens to be very good news for anyone who likes pulling free television out of the air. The rule that keeps these towers running was written for broadcasters and cable subscribers, but antenna owners are the ones who quietly come out ahead. More on that at the end.

First, the cost is real

The instinct that this is expensive is correct. A full-power UHF station can radiate several hundred kilowatts, and the most powerful stations run right at 1,000 kW. Transmitters are not especially efficient at turning wall power into radiated signal. A transmitter site is also a building, not just a mast, and it needs equipment rooms, cooling, and space for the people who keep it running. All of that costs money. It runs every hour of every day, all year, because a station that stays dark for too long risks losing its license.

It's worth putting rough numbers on that. A major UHF affiliate blanketing a large market might run a transmitter drawing somewhere around 130 kilowatts from the wall, plus another 30 or so to keep the equipment cool. Running continuously, that works out to well over a million kilowatt hours a year. At typical commercial electricity rates, the power bill alone lands somewhere in the neighborhood of $150,000 to $250,000 annually, before anyone has been paid or a single piece of equipment has been repaired.

Those are ballpark figures rather than a quote, and the real number swings widely with local electricity rates, the age and efficiency of the transmitter, and how much power the station actually runs. But it establishes the scale. This is a serious recurring expense, not a rounding error.

The transmitter is only part of it. There's the tower itself, which either has to be owned and maintained or leased from someone who does. There are FCC-required obstruction lights that have to work and be monitored. There are structural inspections, grounding and lightning protection, insurance on a very tall and very expensive structure, backup power, and at least one engineer who knows how all of it works and can get there at 2:00 in the morning.

None of that is cheap, and for a station with a relatively small over-the-air audience, none of it looks justifiable on its own. That is exactly why the real reason lies somewhere else.

The license is the ticket

Here's the part most people have never heard. Under the Cable Television Consumer Protection and Competition Act of 1992, a local television station has the legal right to demand that cable systems in its market carry its signal. The cable operator does not get to say no. This is what the industry calls must-carry, or mandatory carriage.

That right attaches to the broadcast license. It is a right held by local broadcast stations, not by video programmers in general. A cable network with no transmitter has no such claim on anyone. It has to negotiate with every cable operator in the country one at a time, and it will frequently end up paying for the privilege or splitting ad time to get on.

A licensed local broadcaster skips that entirely. It files a request, and it's on the system.

Two doors: must-carry or retransmission consent

The 1992 Act gave commercial stations a choice, and which door a station picks tells you a lot about its business.

Retransmission consent is the other option. Instead of demanding carriage, the station withholds permission and negotiates. The cable operator has to strike a deal to carry the signal, and these days those deals involve the cable company paying the station a monthly fee per subscriber. This is the route the big network affiliates take, and retransmission fees have grown into one of the largest revenue lines in local broadcasting. It works because the cable operator genuinely cannot afford to drop the local NBC or CBS affiliate. Subscribers expect those channels and would demand them back. That leverage is the whole basis of the negotiation.

Must-carry is the choice you make when you don't have that leverage. The station gets carried, but it gets paid nothing. Commercial stations elect between the two every three years, per cable system.

Public television stations don't get the choice at all. Your local PBS member station, and noncommercial educational stations generally, may only seek must-carry. They can insist on being carried, but they can't turn around and charge the cable company for it the way a commercial affiliate can.

Why this matters most to independent and religious stations

Now the original question answers itself.

Picture a religious broadcaster, or a home shopping channel, or a small independent station running old movies and infomercials. Nobody is canceling their cable subscription over it. If that programmer entered a retransmission negotiation and asked to be paid, the cable operator would simply decline. It has no leverage whatsoever.

But it doesn't need leverage, because it has a license. It elects must-carry, and the cable systems throughout its market have to add it. That single election puts the channel in front of every cable household in the market on top of everyone already picking it up over the air.

So the transmitter does double duty. It reaches everyone watching over the air, and it simultaneously buys guaranteed access to an entire metropolitan area's cable subscribers. Viewed that way, the power bill starts to make sense. One signal, two audiences, and the second one is only available because the first one exists.

This is also why you'll sometimes find a station whose over-the-air programming seems oddly thin, or that transmits from an awkward site with limited coverage, and yet it appears in the cable channel lineup all the same.

It shows up in the transmitter power too. Browse the stations in almost any market and you'll notice the spread is enormous. The major network affiliates are often radiating several hundred kilowatts, and plenty of them go all the way to 1,000 kW to blanket the whole region, while other full-power stations in the same city are running 15 or 20 kW. Some of that is geography, since a station on a tall mountain needs less power than one on flat ground. Some of it is the band, because VHF channels travel much farther per watt than UHF ones, so a modest VHF number can cover as much ground as a far larger UHF number. Our post on why some stations broadcast at low power works through both of those, along with the translators and distributed transmitters that fill in the gaps. Some of it, however, is the deliberate calculation this post is about. If the guaranteed cable carriage is the main prize, a station only needs enough signal to legitimately serve its community and to reach the cable company's headend. The headend is the facility where a cable operator receives all the channels it distributes, pulling local stations off the air with its own antennas before sending everything back out to subscribers. A station that reaches that one building reaches every household on the system. Paying for a transmitter several times that size, plus the power bill to run it, buys reach it isn't counting on.

The savings are substantial. A station radiating 15 or 20 kW is spending a few thousand dollars a year on transmitter electricity, against the low hundreds of thousands for the affiliate across town running several hundred kilowatts. For a station whose real objective is the cable slot, that gap is the difference between a viable operation and an impossible one.

That's worth knowing as a viewer, because those lower-power stations are exactly the ones that need a decent antenna and a clear path. The station you struggle to pull in isn't necessarily far away. It may just be running a fraction of the power of the affiliate that comes in perfectly.

The fine print

The right isn't unconditional, and the conditions are worth knowing.

The station has to be local. Carriage rights run within the station's market, defined by its Nielsen Designated Market Area. A station can't demand carriage in a city three states away.

The signal has to actually arrive. A station is generally expected to deliver a good quality signal to the cable system's principal headend, or else arrange to get it there at its own expense. You can't demand carriage and then leave it to the cable company to figure out how to receive you.

Cable capacity is capped. A cable operator isn't required to hand over the whole system. Must-carry obligations are limited to up to roughly one-third of the system's capacity, which keeps the requirement from swallowing the lineup in a crowded market.

Low-power stations mostly don't qualify. This is the most significant limitation of the four. LPTV stations are secondary services, and as a rule they have no must-carry right. There is a narrow "qualified low power station" exception, but the conditions are strict enough that very few stations meet them: the station has to sit within 35 miles of the headend and deliver a good quality signal to it, the market has to have been outside the largest 160 markets as of mid-1990, the community of license has to have been under 35,000 people at that time, there can be no full-power station licensed to any community in the county the cable system serves, and the station has to meet the programming obligations that apply to full-power stations. In practice that describes a rural sliver of the country. Everywhere else, a low-power station either negotiates or doesn't get carried.

Satellite works the same way

The same logic was extended to satellite a few years later. Under the Satellite Home Viewer Improvement Act of 1999, satellite providers got a copyright license to carry local stations back into their own markets, the arrangement you see marketed as "local channels." The trade was a rule usually called carry one, carry all: if a satellite provider uses that license to carry any local station in a market, it has to carry all the local stations in that market that ask.

So the broadcast license opens the same door twice. It's the qualification for cable carriage and for satellite carriage both.

Streaming is a different story

Live television streaming services carry local stations too, and it would be reasonable to assume the same rules apply there. They do not.

Services such as YouTube TV and Hulu + Live TV are not cable or satellite systems in the eyes of the law. The industry calls them virtual MVPDs, and the carriage rules written in 1992 and 1999 were built around physical systems that these services do not fit. The FCC opened a proceeding back in 2014 asking whether they should be treated the same way, and it has never acted on it. The question is still technically open.

The practical result is that must-carry does not reach them. A local station has no right to appear on a streaming bundle, and those services decide for themselves which stations to carry. In most markets they carry the major network affiliates and very little else.

This is why a station you find easily in your cable lineup may be missing from a streaming service entirely. The independent, religious and smaller stations that must-carry protects on cable have no such protection online.

It is also a genuine argument for the antenna. Over the air, you receive every station broadcasting in your market, including the ones no streaming bundle chose to carry.

So is broadcasting necessary to get carried?

For the guaranteed version of carriage, the answer is yes. The right belongs to licensed local broadcast stations, and it exists because they are licensed local broadcast stations. Give up the license and the transmitter and you give up the claim. What's left is negotiating with each operator as an ordinary programmer, which for a small independent usually means no carriage at all.

There's a second reason the license matters, and it's older than the 1992 Act. A broadcast license comes with obligations attached to serving a local community, and those obligations are the justification for the carriage rules in the first place. The bargain runs both directions: the station serves the public over the air, and in exchange it can't be locked out of the dominant distribution system in its own market.

That brings us back to something worth remembering. All of those stations, the ones you may only ever have noticed as a number on a cable lineup, are broadcasting right now, for free, to anyone with an antenna. The cable carriage is downstream of that signal, not a replacement for it.

That works out well for those of us who want to pull television out of the air. Must-carry gives every one of these stations a continuing financial reason to keep its transmitter running, including stations whose audience is mostly watching through a cable box. The towers stay lit because the carriage rights depend on it, and everything those towers put out is free to receive. The incentive was written to protect broadcasters and cable subscribers, but antenna owners are the ones who get it for nothing.

So the same rules that explain why a small religious station bothers with a transmitter are the rules keeping a full lineup of free channels over your house. All you need is something to catch them with.

See what's actually broadcasting near you

Most people are surprised by how much is in the air over their city, including plenty of stations they'd only ever seen buried in a cable channel guide. Search your city or zip code to see every station broadcasting in your area, what's on each one, and how strong a signal to expect:

If you want to understand how a single station fits several channels into one broadcast, which is why that cable lineup has so many of them, see our post on how one signal carries many channels. And if you're thinking about picking up these stations directly, our antenna buying guide is the place to start.