Cisco Headend Digital Broadband Delivery System Manuale Di Manutenzione
Chapter 6 Configure the DNCS for EAS and Conduct Tests for System Releases Prior to SR 5.0
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Configuring EAS Messages
The FCC has defined 54 EAM message types, which are listed on the FCC website.
The configuration of an EAM specifies how the set-top presents the alert. By default,
all EAMs use the same configuration, which means that they are presented by the
set-top in the same way. On a set-top (that uses an output other than the IEEE 1394
interface), the default configuration displays a red banner at the top of the screen
and the text for the message is shown in white. If the message is sent with audio
content, it is played instead of the normal program audio while the message is
active. CableCARD hosts only display text.
all EAMs use the same configuration, which means that they are presented by the
set-top in the same way. On a set-top (that uses an output other than the IEEE 1394
interface), the default configuration displays a red banner at the top of the screen
and the text for the message is shown in white. If the message is sent with audio
content, it is played instead of the normal program audio while the message is
active. CableCARD hosts only display text.
Important: If the set-top is connected to the TV with only the IEEE 1394 interface, the
TV will only receive the EAS audio. The set-top must be connected to the TV with an
additional digital video connection (HDMI
TV will only receive the EAS audio. The set-top must be connected to the TV with an
additional digital video connection (HDMI
TM
, DVI, or PrPbY) to receive the EAS
video (text).
The DNCS lets you configure an alternate behavior for each EAM by modifying one
of the existing MMM configurations and by associating an EAM configuration with
the new configuration. For example, if you want a Child Abduction Warning (e.g.,
an Amber Alert) to force tune the set-tops to a local news service, you would use the
force-tune configuration for that EAM.
of the existing MMM configurations and by associating an EAM configuration with
the new configuration. For example, if you want a Child Abduction Warning (e.g.,
an Amber Alert) to force tune the set-tops to a local news service, you would use the
force-tune configuration for that EAM.
Although the DNCS provides the capability to have a unique configuration for each
type of EAM, most operators only use a few configurations (one for messages that
will use the banner, a second for force tuning, one for required weekly tests and
finally one for required monthly tests). You should check current FCC and local
requirements to determine what settings are most appropriate for your operating
environment.
type of EAM, most operators only use a few configurations (one for messages that
will use the banner, a second for force tuning, one for required weekly tests and
finally one for required monthly tests). You should check current FCC and local
requirements to determine what settings are most appropriate for your operating
environment.
The following options can be configured as part of an EAS Configuration.
Force Tune Type—Defines where the set-top is supposed to tune when an EAM
that uses this configuration is received.
that uses this configuration is received.
Message Time—Defines the delay in seconds between repeats of the message.
For example, if this is set to 6 then the message will repeat 6 seconds after the
end of the last time the message was broadcast.
For example, if this is set to 6 then the message will repeat 6 seconds after the
end of the last time the message was broadcast.
Alert Type—Defines how long the message stays on the screen (in seconds).
Display Type—Defines the type of display motion and how long the emergency
message appears on the screen (in seconds).
message appears on the screen (in seconds).