[Problem] To provide a signal configuration device, a signal configuration system, a signal configuration method, and a storage medium storing a signal configuration program which enable quickly transmitting data that corresponds to an emergency alert signal. [Solution] This signal configuration device 12 includes an information generating unit 21. The information generating unit 21 corresponds to a TMCC information generating unit 121 in the first embodiment shown in FIG. 2. The information generating unit 21 generates a transmission frame in which each of the multiple slots configuring the frame includes an activation control signal corresponding to whether or not an emergency alert is being broadcast.