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Evolution Digital
4.2
Manual Clear, Full
Section 8.2 discusses the method for a manual clear, full. With the proper remote button presses, the DTA can be
manually put into a cold reset state. In this case however, the headend is not aware that the DTA has been reset
since the command was manually initiated. The DTA will need the configuration and activation commands sent
from the headend controller to bring it back to a Normal Operations Mode state.
5.0
EAS
The DTA supports in-band EAS messages delivered via SCTE-18 messages on PID 0x1FFB. More details on the
EAS messaging structure can be found in [Ref 3]. The DTA only supports force tune.
5.1
Alert Priorities
The DTA will only process EAS messages when in Normal Operations Mode. The DTA will process all EAS
messages with a priority alert of one (1) or higher. If an EAS message with priority zero (0) is received, the DTA
will store the sequence number associated with that EAS message and will not tune to the alert channel.
5.2
Exceptions List
The DTA supports an exception list. Meaning, if the DTA is tuned to a channel that is included in the exception list
delivered with the EAS message (configured in the headend) the DTA will not tune to the alert channel. It will
ignore the EAS message.
5.3
Force Tune Behavior
Upon reception of an EAS message containing a priority of 1 or greater, the DTA will force tune to the alert channel
as described in the details_major_channel_number and details_minor_channel_number fields. The major channel
number field will represent the CDS reference (EIA channel) and the minor channel will represent the MPEG
service number. Please note, the DTA will only force tune to a channel that is included in its currently loaded
channel map.
5.3.1 Duration of Force Tune
The DTA will stay tuned to the alert channel for the period of time indicated in the alert_message_time_remaining
included in the EAS message (maximum value of 120 seconds).
5.3.2 DTA Behavior
During the force tune, the DTA will not allow any channel changes (either direct or up/down changes). The DTA
will ignore all remote control button presses except volume up/down, mute and language. The DTA will ignore any
EVO-SUP-DMS2002HD-U-001-v1r0
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