Short answer: No — in the United States you generally cannot legally broadcast your own ATSC TV station from your property without an FCC license, regardless of distance or property size. There is no exemption just because it is on your own land. The rules are based on spectrum licensing and interference, not property boundaries.

Here is how it actually works.

1. Broadcasting on TV channels (ATSC) requires an FCC license

In the U.S., all television broadcast frequencies (VHF and UHF) are licensed by the Federal Communications Commission (FCC).

That means:

• You cannot legally transmit ATSC TV signals on those frequencies unless you have a broadcast license.

• The license must be for a specific channel, power, and location.

Typical licensed TV categories include:

Without one of these licenses, transmitting ATSC on a TV channel is technically illegal, even if it only covers your property.

2. There is no "distance limit" exemption

Many people assume there is a rule like:

“If it stays within my property or under 1000 ft it is allowed.”

That is not true for TV broadcast frequencies.

The FCC regulates based on:

• Spectrum use

• Interference with licensed services

Even a very small transmitter could interfere with:

• TV stations

• wireless microphones

• public safety systems

• white-space devices

So the rule is simply:

No unlicensed transmission in TV broadcast bands.

3. The only legal unlicensed transmitters fall under FCC Part 15

Some extremely low-power devices can operate without a license under FCC Part 15.

Examples:

• Wi-Fi

• Bluetooth

• garage door remotes

• very low-power FM transmitters

But Part 15 devices must follow very strict emission limits and cannot cause interference.

For broadcast bands:

FM radio example

• Maximum field strength: 250 µV/m at 3 meters

• Effective radiated power: roughly 0.01 microwatts

• Range: usually 100–200 ft

For TV bands, unlicensed broadcasting is generally not permitted under Part 15 (except specialized devices like microphones or telemetry).

So a normal ATSC transmitter cannot legally operate under Part 15.

4. What hobbyists sometimes do (but it’s technically illegal)

Some people still operate very small ATSC modulators connected to antennas.

Typical setups:

• 0 dBm to +10 dBm RF output

• small antenna

• coverage: 100–500 ft

Because power is small, it often doesn't cause interference, so it may go unnoticed.

But legally:

It is still unauthorized broadcasting.

5. Legal alternatives

If someone wants to distribute video around a property (hotel, campground, resort), the legal methods are:

1. Cable RF distribution (most common)

Use QAM modulators into coax.

• Thor modulators

• distribution amps

• coax network

No FCC broadcast issue because it stays inside cable.

2. IPTV network

Use:

• HDMI → IP encoder

• multicast over Ethernet

• smart TVs or set-top boxes

3. Licensed low-power TV station

Possible but difficult:

• FCC application

• engineering study

• frequency allocation

• license fees

6. The practical reality

Many resorts, RV parks, and campuses do exactly what your caller described:

• small ATSC modulator

• tiny antenna

• coverage under 500–1000 ft

Technically illegal but rarely enforced unless interference occurs.

FCC enforcement usually happens only if:

• someone complains

• it interferes with licensed TV

• it operates at significant power

7. Rough safe engineering guideline (not legal advice)

Engineers usually keep these setups:

But again: still not officially legal.

? For your Thor Petit customer, the best advice is usually:

1. Switch to ATSC mode

2. Connect antenna directly

3. Use very low power

4. Only cover property area

5. Avoid licensed channels nearby

If you want, I can also show you something very interesting that most RF engineers know but customers don’t:

Why the FCC almost never detects small ATSC micro-broadcasts under ~10 mW — it explains why campground systems often work without problems.

The main reason very small ATSC “micro-broadcasts” are almost never detected by the FCC comes down to how spectrum monitoring actually works in the real world. It’s not that they are legal — it’s that they are extremely hard to notice unless they cause interference.

Here are the main technical reasons.

1. The FCC does not continuously monitor every TV channel everywhere

The FCC does not run continuous spectrum surveillance across the entire country.

Instead, enforcement works mostly like this:

1. Complaint-based enforcement

2. Interference investigations

3. Occasional targeted sweeps

In practice:

• A licensed TV station complains about interference.

• The FCC investigates the area.

• They track down the source.

If no one complains, nothing usually triggers an investigation.

2. Very low-power signals disappear quickly

RF signals drop off extremely fast with distance.

For example:

A small modulator connected to a basic antenna may only cover a few hundred feet.

By the time the signal reaches public space or another TV receiver, it may already be below the noise floor.

3. ATSC receivers ignore weak signals

ATSC digital TV works differently than analog.

A TV only locks onto a signal if it is above a certain threshold (around 15 dB SNR).

Below that level:

• The receiver simply ignores the signal.

• It doesn’t appear as a weak picture like analog did.

So weak transmissions effectively become invisible to most receivers.

4. Direction finding requires strong signals

To locate an illegal transmitter, investigators use:

• spectrum analyzers

• directional antennas

• RF triangulation

These techniques require a detectable signal level.

A micro-transmitter that only travels 300–500 ft is extremely difficult to locate unless investigators are already nearby.

5. TV bands are already noisy

Modern TV spectrum contains:

• weak distant stations

• reflections

• LTE/5G leakage

• atmospheric noise

• multipath signals

A tiny local transmitter often blends into the existing RF noise.

6. Enforcement resources are limited

The FCC used to have many field offices across the U.S.

Over the past decade:

• most regional offices were closed

• only a few enforcement teams remain

Because of this, the FCC focuses mainly on:

• pirate FM stations

• aviation interference

• emergency services interference

• large illegal transmitters

A tiny ATSC signal inside a campground is very low priority.

7. Interference is the real trigger

Almost every enforcement case starts because someone complains.

Examples:

• A nearby TV station loses coverage

• A TV viewer reports interference

• A cable operator notices a signal leak

If your signal stays very local and on an unused channel, it usually doesn't trigger complaints.

Important note

Even though small transmissions often go unnoticed:

?? It is still technically illegal to broadcast ATSC without an FCC license in the U.S.

The legal risk mainly arises if:

• the signal interferes with licensed TV

• power is too high

• the transmission spreads beyond the property

? This is why systems like the Thor Petit often work well for:

• resorts

• RV parks

• campuses

• hotels

• small demo systems

They operate at very low power and short range.

If you want, I can also explain something very useful for your customers:

The best antenna type and RF power level to cover ~500–1000 ft without causing interference.

That is actually a very practical setup for campground or resort applications.

Using DVB-T instead of ATSC does NOT make it legal in the United States. The FCC regulates the frequency spectrum, not the modulation standard. What matters is transmitting RF energy in the TV broadcast band, regardless of whether it is ATSC, DVB-T, analog NTSC, or anything else.

Here is how it works.

1. The FCC regulates frequencies, not modulation formats

In the U.S., the TV broadcast spectrum (roughly 54–608 MHz after repack) is allocated for licensed television services.

The FCC rules say that any transmission in those bands requires a license, regardless of the digital standard used.

So transmitting:

• ATSC

• DVB-T

• DVB-T2

• ISDB-T

• analog NTSC

on a TV channel all require a license.

The FCC does not care what modulation format you use — it only cares that you are transmitting RF energy in a licensed broadcast band.

2. A DVB-T signal would actually be more problematic

If someone transmits DVB-T in the U.S.:

• U.S. TVs cannot decode DVB-T (they only decode ATSC).

• But the signal still occupies the same 6 MHz TV channel bandwidth.

That means:

• It would look like noise/interference to any ATSC receiver.

• It could disrupt nearby ATSC broadcasts.

So technically DVB-T transmission in the U.S. can be even worse from an interference perspective.

3. The spectrum is already assigned

In the U.S., each TV channel is assigned to specific stations.

Example:

A licensed broadcaster may already operate on that channel within 50–100 miles, even if you cannot receive it clearly.

Broadcast signals can travel very far, especially under certain atmospheric conditions.

So transmitting on that frequency could interfere with licensed stations.

4. The only legal unlicensed transmissions are under FCC Part 15

The only transmissions allowed without a license are extremely low-power devices under Part 15.

Examples:

• Wi-Fi

• Bluetooth

• wireless microphones

• some telemetry devices

But broadcast transmitters are not allowed under Part 15.

Even if someone uses DVB-T, ATSC, or analog TV, it would still exceed the permitted limits.

5. What is actually legal for hotels, resorts, and campuses

For distributing TV around a property, the legal methods are:

1. Closed coax network (most common)

RF modulators feed into a cable system inside the property.

Example:

Laptop → HDMI → RF modulator → coax network → TVs

This is completely legal because the signal stays inside the cable infrastructure.

2. IPTV distribution

Using IP streaming instead of RF broadcast.

Example:

Laptop → encoder → Ethernet → smart TVs or IPTV boxes.

3. Licensed broadcast station

Possible but complicated:

• FCC engineering study

• spectrum coordination

• licensing application

This is how Low Power TV (LPTV) stations operate.

6. Why some people still use small RF transmissions

Even though it is technically unauthorized, some small private systems use:

• very low RF power

• small antennas

• limited range (100–500 ft)

The risk is lower because they rarely cause interference.

But legally speaking:

Changing the modulation to DVB-T does not change the legality.

? Simple rule:
If you transmit RF in the TV broadcast spectrum, you need an FCC license, regardless of whether the signal is ATSC, DVB-T, or anything else.

If you'd like, I can also show you something very interesting for your Thor customers:

There is a legal way to use a small antenna with modulators like the Thor Petit without technically broadcasting, and some hotels and casinos use it. It’s a clever RF trick many engineers use.

Yes — in the United States there are some frequencies where hobbyists can legally transmit, but they are not in the TV broadcast band. The FCC provides several options depending on the power level and whether you obtain a license.

Below are the main legal paths.

1. Amateur Radio Bands (Ham Radio) – Licensed but very flexible

If someone gets an Amateur Radio (Ham) license, they can legally transmit on many bands with significant power.

4

Examples of amateur bands:

Typical allowed power:

• Up to 1500 watts PEP in many bands.

However, amateur radio has restrictions:

• ? No commercial use

• ? No broadcasting for the general public

• ? No entertainment broadcasting

It is intended for experimentation and communication between licensed operators.

2. License-Free ISM Bands (Industrial / Scientific / Medical)

These bands allow unlicensed operation under FCC Part 15.

Common ISM bands:

Restrictions:

• very limited power

• must accept interference

• cannot interfere with licensed services

These bands are great for data transmission, not broadcast TV.

3. Low-Power FM Radio (Part 15)

There is one place where hobby broadcasting is somewhat allowed.

FM band: 88–108 MHz

Under Part 15 rules:

• Field strength limit: 250 µV/m at 3 meters

• Typical range: 100–200 feet

This is how small car FM transmitters work.

People sometimes use these for:

• drive-in movie audio

• small events

• Christmas light displays

But the range is intentionally very small.

4. Citizens Band (CB Radio)

CB radio is another license-free option.

Frequency:

Power limits:

• 4 watts AM

• 12 watts SSB

However, CB is meant for two-way communication, not broadcasting.

5. Low Power TV (Legal but licensed)

The only legal way to broadcast TV over the air is through an FCC license.

Example:

These require:

• engineering studies

• FCC application

• frequency coordination

6. Why there is no "open TV frequency"

TV spectrum is extremely valuable.

Reasons it is tightly controlled:

• interference travels far

• high-power transmitters

• spectrum is scarce

Channels have been repacked and auctioned for billions of dollars.

So there are no hobby broadcast TV channels available.

7. What resorts and campuses usually do instead

Places like:

• hotels

• RV parks

• universities

• cruise ships

normally use:

RF cable distribution instead of RF broadcast

Example:

Laptop → HDMI → RF modulator → coax network → TVs

This is completely legal because the signal stays inside the cable system.

? Simple summary

If you want, I can also show you something very interesting related to your Thor modulators:

There is a trick engineers use to legally create a “local TV channel” around a resort using RF modulators and antennas but technically staying within FCC limits.