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What is SFN?

SFN (Single-frequency network) is a broadcast network where several transmitters simultaneously send the same signal over the same frequency channel and is not applicable to Allegion electronic devices.

Analog AM and FM radio broadcast networks as well as digital broadcast networks can operate in this manner. SFNs are not generally compatible with analog television transmission, since the SFN results in ghosting due to echoes of the same signal.

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