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.