Why FM?

What is FM?

Digital modulation (DM) is a generic term. DM is not a form of a signal. In the pet containment industry, all AM and FM signals are DM similar to what you would find in a car radio. Fences from Invisible Fence®, Pet Stop®, and other brands all use forms of Amplitude Modulation (AM). DogWatch is the only vendor in the pet containment industry with Frequency Modulation (FM).

Is this important to me?

The differences between AM and FM are substantial:

- AM receivers are susceptible to interference from other products such as computers, garage door openers, and televisions.

- FM signals are used by police, fire, and aircraft equipment because the reception is much more immune to interference.

DogWatch is the only manufacturer of Hidden Fences with a patented FM radio signal. We believe FM is more secure and offers major safety advantages for you and your pet.

Why did DogWatch choose to be FM?

An FM radio system allows us to offer the consumer a greater number of features. An FM radio wave is more concise and therefore allows faster reception of the signal than waves from an AM radio. Fences from DogWatch can pack more features to protect your pet (FastReact™), and are convenient for you (AutoMemory™), while providing the longest battery life in the industry.