The Truth About Digital Modulation

Many hidden fence companies promote their products as incorporating DM, or 'Digital Modulation', touting it as the latest advancement in radio transmission technology for hidden fence systems. They often claim it surpasses even FM radio, labeling it as a 'next generation' innovation. However, it's important for discerning consumers to know the reality behind these claims.

Digital Modulation (DM) is a technique used in radio signal processing to transmit and receive data via FM (Frequency Modulation) or AM (Amplitude Modulation) radio waves. This technology is widespread and utilized in various communication devices, from cell phones to hidden fences. These devices transmit information by sending signals that are 'digitally modulated' across FM or AM radio bands. While DM employs AM/FM radio technology foundations, it should not be mistaken as a revolutionary successor to these existing methods.

digital radio signal

FM Digital Radio is Far Superior to AM Technology

We’re all familiar with the difference between AM and FM radio. FM is known for providing clearer sound without static or interference, which is why music stations and emergency responders use it. The same holds true for pet containment systems. FM digital fences deliver reliable, consistent performance without signal disruption. AM radio waves, on the other hand, are prone to interference and distortion, which can cause system misfires that accidentally and incorrectly shock pets. This understandably causes stress and anxiety in dogs and cats contained by AM fences.

Clarifying Digital Modulation in Hidden Fence Systems

Digital Modulation (DM), a key element in radio signal processing, is universally employed in all hidden fence products on the market. Regardless of whether these products are based on AM (Amplitude Modulation) or FM (Frequency Modulation) radio technology, DM is the underlying technology utilized for processing their transmissions. It's crucial to understand that the application of DM in the hidden fence industry is not an exclusive or groundbreaking feature; it is a standard technology used across all available products.


What is the difference between AM and FM? FM radio signals are generally clearer and more secure compared to AM signals, which is why FM is preferred for purposes like music broadcasting and emergency services communications. This distinction also impacts hidden fence systems. AM-based hidden fence collars are more susceptible to interference from various common household electronic devices that also emit AM radio signals. This interference can cause a digital AM hidden fence collar to 'misfire,' leading to accidental and random activation that may startle or confuse your pet.


In contrast, a DogWatch® digital FM hidden fence is designed to avoid such misfires, ensuring a safer and more reliable containment system for your pet. It's essential for pet owners to be aware of these technological nuances when choosing the best hidden fence system for their needs.

Understanding FM Digital Radio Technology in Hidden Fence Systems

A key aspect in the marketing strategies of certain hidden fence companies revolves around their emphasis on Digital Modulation (DM). This focus often stems from the fact that their products are based on AM (Amplitude Modulation) radio technology, which is inherently less clear and secure compared to FM (Frequency Modulation) radio. These companies, in an effort to compete with DogWatch®, the only company in the industry offering an FM digital radio-based hidden fence product, highlight DM as a special feature. However, this can be misleading as DM is a common technology used across various applications, not a unique advancement in hidden fence systems.


It's important for consumers to recognize that DM is not an exclusive, advanced technology offered by a specific hidden fence company. In fact, all companies in this industry utilize Digital Modulation in their product lines. A relatable example is the digital AM/FM radio in modern cars. Whether the radio is set to an AM or FM station, it employs a DM to process the signal. The manufacturer of the car (be it Ford, BMW, Toyota, etc.) does not change this fundamental aspect. The perceived quality of a car radio often boils down to the choice between AM and FM stations, with FM generally providing a clearer sound.


In a similar vein, the superiority of one hidden fence product over another is not determined by the use of DM itself, but rather by the type of digital modulation employed: FM versus AM. FM-based hidden fences offer clearer and more secure containment solutions, distinguishing them from their AM-based counterparts.

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