The emergency alert SD encoder 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 EAS or All Call information. The national public warning system in United States. 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 EH24 encoder host EAS or All Call mode by providing a contact closure. Once EAS is activated EH24 will replace all PIDS with encoded EAS message from SDE24 EAS encoder so that all programs contain message.