EAS is national public warning system in the United States. The system may be used by federal, state or local authorities to deliver important emergency information. EAS or any “All Call” system is designed to override all channels with the EAS or “All Call” information. Most EAS or “All Call” systems have been analog based. The transition to digital TV distribution provides new methods of implementation. Drake has developed a specialized SDE24EAS encoder module to digitize legacy analog EAS receivers for digital distribution.

The EAS receiver activates the EH24 encoder host EAS or “All Call” mode by providing a contact closure. Once EAS is activated the EH24 will replace all PIDS with the encoded EAS message from the SDE24 EAS encoder so that all programs contain the message.