3025EMC Master Control Switching & Channel Branding
Revision 3.0.3 Page 167
8.2. CONFIGURING THE EAS (+E OPTIONED UNITS ONLY)
8.2.1. Serial
When the EAS option (+E) is added to the EMC, it has the ability to key Emergency Alert messages
received from a Sage, TFT, Trilithic or DASDEC EAS Decoder over a serial or IP connection
(dependent on EAS device). The Emergency Alert Messages are inserted over program video and
program audio. In order to insert the audio you will have to convert the analog audio from the decoder
to AES and connect it to the AES Inputs of the EMC. See chapter 8.3 for more information on
connecting and configuring the EAS decoder.
8.2.1.1. TCP/IP
Alternately, the EMC can be configured to receive EAS messages and audio over TCP. The EMC
firmware implements the DVS/168 protocol, referred to informally as EAS over TCP/IP. FTP is used to
send text files to insert as crawls and WAV files to play as audio clips.
EAS over TCP/IP (EAS over Ethernet) is supported with Trilithic's EASy Plus box and DASDEC. For
further details, refer to the step-by-step instructions in the Trilithic “EASyPlus” Setup Tech Note.
8.3. EAS DECODER INTERFACE (EAS OPTIONED UNITS ONLY)
The EMC with the EAS option fitted is the perfect solution for on-air insertion of channel branding bugs
and Emergency Alert System messages. The EMC is designed to interface with serial port based EAS
decoders and to Ethernet based EAS decoders. The emergency alerts from these decoders are
inserted over the program video and/or audio.
This section describes how to connect the Sage, TFT or DASDEC serial port based EAS decoders to
the EMC, how to configure those decoders and the EMC and to perform tests to verify the system is
functioning properly. The Setup of the Trilithic over serial is similar to the Sage serial setup (however,
we do not have a Trilithic Decoder Configuration section at this time).
For instructions on configuring the Trilithic EAS decoder for operation over TCP refer to the Technical
Note titled, “Trilithic EASyPlus Setup”. For using the DASDEC device over TCP, refer to the DASDEC
guide (section 8.3.4).
8.3.1. Connecting the EMC to the EAS Decoder
Make sure that the basic video and audio connections are wired. You will also have to route the output
program video to an appropriate monitor to view the on-screen scrolling messages generated by the
EMC’s built in character generator. Please ensure that your EMC is out of the broadcast path when
testing functionality. Figure 8-2 gives a simplified connection overview.
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