Trilithic EASyCAP C5020, Operation Manual

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DRAFT
EASyCAP Encoder/Decoder - Manual
5
1. General Information
Chapter 1
Introduction
The Trilithic EASyCAP (Model EASyCAP-1) EAS (Emergency Alert System) Encoder/Decoder is
a two-U rack mounted control center capable of performing manual or automated EAS messaging
for Cable, Broadcast, and Wireline systems, in accordance with CFR 47 part 11 FCC regulations,
and the EAS Cable Handbook.
The EASyCAP receives EAS messages from up to six audio sources (internal or external),
decodes the FSK EAS message, and operates the target system equipment to replay the
message for viewers/listeners. In addition, messages can be originated by the user via local or
remote control of the EASyCAP. The EAS Audio sources for the EASyCAP include internal AM/
FM/NOAA radios and external audio inputs that can be connected to any known EAS audio
source. EAS Audio is decoded by the internal AFSK circuitry, it is then sorted and interpreted to
determine the type of emergency or test, locations for which the emergency applies, and other
information supplied in the EAS Header. If a voice message is contained in the EAS message, it
is recorded for possible playback to subscribers. EAS messages then pass through a series of
tests to determine if the message matches predefined, user configurable parameters. If these
tests pass, EAS activation (message playback) to the system occurs. To play an EAS message to
viewers/listeners, the EASyCAP activates TTLs, Contact Closures, RS-485 data commands, RS-
232 data commands, and several IP based protocols, it also supplies pertinent video and re-
encodes/plays the EAS FSK and recorded audio. The TTLs, Contact Closures, and serial data
commands, and IP protocols activate routing equipment and end-user devices to provide the
emergency audio and video to all viewers/listeners.
In addition to the EAS messaging capabilities, the EASyCAP records all received and
transmitted messages in it’s internal log for later retrieval.