08 Jul How can a receiver be automatically turned on in time of emergency?
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How can a receiver be automatically turned on in time of emergency?
Sender: Sumit Kumar
The DRM EWF (Emergency Warning Functionality) specification explains this process. At the core, DRM carries an alarm signalling flag in its transmission. This alarm signal needs to be transmitted by ALL DRM services that cover the affected area. A receiver in stand-by mode can pretty efficiently check for this alarm signal activation and then switch-on on demand. The alarm signal contains the information for the receiver where to find the actual emergency programme (typically carried by the public broadcaster from a transmitter that best covers the affected area).